Two rules come in handy here:
[tex]\dfrac{a^m}{a^n}=a^{m-n}[/tex][tex]\sqrt[c]{x^r}=x^{\frac{r}{c}}[/tex]So we have
[tex]
\dfrac{\sqrt[4]{6}}{\sqrt[5]{6}}=\dfrac{6^{\frac{1}{4}}}{6^{\frac{1}{5}}}=6^{1/4-1/5}=\boxed{6^{9/20}}
[/tex]
The answer is B.
Hope this helps.
46. Perhatikan gambar!
Bila amperemeter menunjuk angka 0,6 A,
maka nilai yang terukur pada Volmeter adalah
Jika
ham
arus
RE
A
A. 1,5 Volt
B. 3,4 Volt
C. 4,5 Volt
D. 6,2 Volt
A
paraan berikut van tidak benar dari
Answer:
B. 3,4 VoltStep-by-step explanation:
Here we need to use Ohm's Law, because we have electric current, voltage and resistances. This law state: [tex]V=IR[/tex]
So, first we need to calculate the total resistance to then find the voltage. The resistances can be placed in two ways: in parallel, in series.
The pair 4 and 8 ohms are parallel, so we solve:
[tex]R_{T}=\frac{1}{R_{1}}+\frac{1}{R_{2}}[/tex]
[tex]\frac{1}{R_{T}}=\frac{1}{4}+\frac{1}{8}=\frac{8+4}{32}=\frac{12}{32}=\frac{3}{8}[/tex]
Which is, [tex]R_{T}=frac{8}{3}[/tex]
Now, this total resistance of parallels ones is placed in series with the 3 ohm resistance, in this case we just sum, because they are in series:
[tex]R=3+\frac{8}{3}=\frac{9+8}{3}=\frac{17}{3}=5.67 ohm[/tex]
Now that we have the total resistance of the circuit, we use the Ohm's Law:
[tex]V=IR\\V=(0.6A)(5.67ohm)=3.4 Volt[/tex]
Therefore, the right answer is B.
Tamara estimated 50‾‾‾√ to fall between 7 and 8. Collin gave a more precise estimate, saying that it’s between 7.0 and 7.1. Brett says that he can estimate the value so that it’s between 2 consecutive rational numbers with decimals to the hundredths. Between what two consecutive numbers does 50‾‾‾√ lie? between 7.07 and 7.08 between 7.08 and 7.09 between 7.09 and 7.10 between 7.10 and 7.11
Answer:
√50 lies between 7.07 and 7.08.
If h is a linear function with h(1) = 10 and h(3) = -6, what is h(5)?
Answer:
h(5) = - 22
Step-by-step explanation:
Given that h is a linear function say, h(x) = ax + b ......... (1)
Now, given that h(1) = 10 and h(3) = - 6
Hence, we can write from equation (1), a(1) + b = 10, ⇒ a + b = 10 .......... (2)
And a(3) + b = - 6, ⇒ 3a + b = - 6 ........ (3)
Now, solving equations (2) and (3) we get (3a - a) = - 6 - 10
⇒ 2a = - 16
⇒ a = - 8
So, from equation (2), we get, b = 10 - a = 18
Therefore, the linear function is
h(x) = - 8x + 18
Hence, h(5) = - 8(5) + 18 = - 22 (Answer)
PLEASE HELP!! WILL MARK BRAINLIEST AND THANK YOU!!! IM DESPERATE!!
Find the area.
______m²
Answer:
693 m²Step-by-step explanation:
This is a parallelogram.
The formula of an area of a parallelogram:
[tex]A=bh[/tex]
b - base
h - height
From the graph we have b = 21m and h = 33m.
Substitute:
[tex]A=(21)(33)=693\ m^3[/tex]
Teresa was the designing a game to play at lunch time with her friends she wanted to know which number on the die is the luckiest she roll a die 50 times the dial and it's showing the number five 20 times she claimed she rolled a five 20% of the time
Answer:
Teresa is wrong. 20 times does not always mean 20% because it depends on the total times she rolled the die. Since she rolled the die 50 times, the fraction she got five was 20/50, which is 40%.
Pick the expression that matches this description: A polynomial of the 5^th degree with a leading coefficient of 7 and a constant term of 6
Choose 1 answer:
(Choice A) 7x^6-6x^4+5
(Choice B) 6x^7-x^5+5
(Choice C) 6x^5+x^4+7
(Choice D) 7x^5+2x^2+6
Derick solves the problem below.
-3(4n + 2) = -4n + -2 (4n - 6)
After solving, he says that the equation has no solution.
If Derick is correct, show how you know.
If Derick is incorrect, show how you know and describe the solution to the equation.
As it is proved that the equation has no solution, Derick is correct
Step-by-step explanation:
Given
[tex]-3(4n + 2) = -4n + -2 (4n - 6)[/tex]
We have to solve the equation in order to check if Derick was solved the equation correctly or not.
So,
Applying distributive property first
[tex]-12n -6 = -4n -8n +12\\-12n-6 = -12n+12\\-12n+12n-6 = 12\\-6 = 12[/tex]
As the variable is already cancelled in the equation there is no unique solution.
In order for an equation to have infinite solutions the constant on both sides of equation should be same which is not the case in the given equation
So,
As it is proved that the equation has no solution, Derick is correct
Keywords: Linear equations, variables
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Final answer:
Upon simplification, the equation results in a contradiction (-6 = 12), proving Derick's conclusion of no solution to be correct.
Explanation:
To determine if Derick's conclusion that the equation -3(4n + 2) = -4n + -2 (4n - 6) has no solution is correct, we first simplify the equation. Distributing the coefficients on both sides gives:
-12n - 6 = -4n - 8n + 12
Combining like terms on the right side leads to:
-12n - 6 = -12n + 12
Adding 12n to both sides and simplifying:
-6 = 12
This statement is a contradiction, implying that there is no value of n that can satisfy the original equation, meaning Derick's conclusion of no solution is correct.
Find the ratio of the surface area to volume of the rectangular prism brlow
Answer:
[tex]A = 2(width*length) + 2(length*height)+2(width*height)\\=> 2(wl+lh+wh)\\where \ w = width,\ l=length \ and \ h = height[/tex]
l = 8, w = 5, h = 6
A = 2(5*8 + 8*6 + 5*6)
A = 236
[tex]Volume = width * length * height\\V = wlh[/tex]
V = 5*8*6
V = 240
Ratio of A to V = A / V
236/240 = 236:240
Step-by-step explanation:
The surface area of any object is the total area of each face of that object. Now, we have a rectangular prism with dimensions given. Considering a face of the prism, there is an opposite face and this is why the area of each face was multiplied by 2. That is how the formula for the surface area of an object is derived
For the volume, the formula is multiplying the height, width and length
When the area and volume is computed, we now take the ratio of the answers to arrive at 236/240 which in ratio form is 236:240
PLZ HELPPPPP
maria borrowed 300 dollars from her parernts. She agreed to pay 15 dollars back each week. Which equation shows how much money, M, Maria owes after n week
A. M= -15n+300
B. M= 15n + 300
c. M= -15 + 300n
D. M= 15-300n
Answer:
A. M = -15n + 300
Step-by-step explanation:
Given:
Money Borrowed =300
Money to be paid each week = $15
Total number of weeks = 'n'
We need to find the equation which shows Money owes 'M' after 'n' weeks by maria.
Money Owes after n week will be equal to Total Money Borrowed minus Money to be paid each week multiplied by number of weeks.
framing in equation form we get;
[tex]M = 300-15n[/tex]
Hence The Equation representing the Money owes by Maria after n week is [tex]M = 300-15n[/tex]
Answer:
A M= -15n+300
Step-by-step explanation:
How can I solve this question
Answer:
The value of x can be 5 or 2
Step-by-step explanation:
In given triangle ABC
Interior Angle A = [tex]x^{2} +3x+20[/tex]
Interior Angle B = [tex]x^{2} +14x-5[/tex]
Exterior Angle I = [tex]3x^{2} +10x+25[/tex]
We know that
Exterior Angle of triangle is summation of corresponding opposite angles
Angle I = Angle A + Angle B
[tex]3x^{2} +10x+25= (x^{2} +3x+20)+(x^{2} +14x-5)[/tex]
[tex]3x^{2} +10x+25= 2x^{2} +17x+15[/tex]
[tex]1x^{2}-7x+10=0[/tex]
[tex]x^{2}-2x-5x+10=0[/tex]
[tex]x(x-2)-5(x-2)=0[/tex]
[tex](x-5)(x-2)=0[/tex]
length of a room is 3 times its breadth and height is 4.6 m.if the total cost of carpeting the floor of a room at the rate of Rs. 60 per square meter is Rs. 4500,Find the total cost of papering the 4 walls at the rate of Rs. 6.
The student's homework question involves the calculation of a room's floor area for carpeting costs and then determining the wall area for papering costs, utilizing given ratios and costs per square meter.
The question involves calculating the area of a room's floor and using that to determine the cost of carpeting, followed by calculating the cost of papering the walls. To solve for this, we use the given ratio of the length being 3 times the breadth (let's say the breadth is 'b', then the length would be '3b'). When the carpeting cost of Rs. 60 per square meter totals Rs. 4500, we can find the area of the floor by dividing the total cost by the per square meter cost, which gives us an area of 75 square meters (i.e., 4500 / 60 = 75 m2).
Assuming the room to be a rectangle, the length and breadth can be determined from the area (since length times breadth = area), and given the relationship between length and breadth, we can solve for 'b' and then find '3b'. Once we have the dimensions of the floor, we can calculate the perimeter (2 times (length + breadth)) and use the given height to find the total area of the walls. The cost of papering is then determined by multiplying the wall area by the cost per square meter (Rs. 6 in this case).
If 6 pounds of pasta feeds 20 people. How much would 4 pounds of pasta feed?
Answer:
13.333...
Step-by-step explanation:
20 divided by 6 = 3.33...
3.33 * 4 = 13.333
Find the zeros of the function in the interval [-2pi, 2pi] f(x)= -4sin x
Answer:
Zeros are [tex]x=-2\pi,-\pi,0,\pi,2\pi[/tex]
Step-by-step explanation:
[tex]f(x)=0\\-4\sin x=0\\\sin x=0\\[/tex]
[tex]\sin(-2\pi)=0\\\sin(-\pi)=0\\\sin(0)=0\\\sin(\pi)=0\\\sin(2\pi)=0[/tex]
It's B) 0, ±pi, ±2pi on edge
Given
f(x)=3x2+7x and g(x)=2x2-x-1, find (f+g)(x).
Answer:
5x^2+6x-1
Step-by-step explanation:
Remember that (f+g)(x)=f(x)+g(x).
(3x^2+7x)+(2x^2-x-1)
3x^2+2x^2+7x-x-1
5x^2+6x-1
The sum of the functions f(x) = 3x^2 + 7x and g(x) = 2x^2 - x - 1, represented by (f+g)(x), equals to 5x^2 + 6x -1.
In mathematics, particularly in algebra, the operation (f+g)(x) represents the sum of the two functions f(x) and g(x). In order to find the sum, you simply carry out the addition operation on the functions term by term. Given your functions f(x) = 3x^2 + 7x and g(x) = 2x^2 - x - 1, the sum (f+g)(x) is then calculated as follows:
Add the x^2 terms: 3x^2 (from f(x)) + 2x^2 (from g(x)) = 5x^2Add the x terms: 7x (from f(x)) - x (from g(x)) = 6xAdd the constants: There's no constant in f(x), and -1 in g(x), so the sum is -1
Therefore, (f+g)(x) = 5x^2 + 6x -1.
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Need help! Please ! Thanks !
Answer:
Step 1: Distribute each term of the first polynomial to every term of the second polynomial. Remember that when you multiply two terms together you must multiply the coefficient (numbers) and add the exponents.
Step 2: Combine like terms (if you can).
its 76 degrees fahrenheit at the 6000-foot level of a mountain, and 49 degrees Fahrenheit at the 12000-foot level of the mountain. write a liner equation to find the temperature T at an elevation x on the mountain, where x is in thousands of feet.
[tex]T = \frac{-9}{2}x + 103[/tex] is the linear equation to find the temperature T at an elevation x on the mountain, where x is in thousands of feet.
Solution:
The linear equation in slope intercept form is given as:
T = cx + k ------ (i)
Where "t" is the temperature at an elevation x
And x is in thousands of feet
Given that its 76 degrees fahrenheit at the 6000-foot level of a mountain
Given, when c = 6 thousand ft and [tex]T = 76^{\circ}[/tex] fahrenheit
This implies,
From (i)
76 = c(6) + k
76 = 6c + k
⇒ k = 76 - 6c ----- (ii)
Given that 49 degrees Fahrenheit at the 12000-foot level of the mountain
Given, when c = 12 thousand ft and [tex]T = 49^{\circ}[/tex] fahrenheit
This implies,
From (i)
49 = c(12) + k
49 = 12c + k
Substitute (ii) in above equation
49 = 12c + (76 - 6c)
49 = 12c + 76 - 6c
49 - 76 = 6c
6c = -27
[tex]c = \frac{-9}{2}[/tex]
Substituting the value of c in (ii) we get
[tex]k = 76 - 6( \frac{-9}{2})\\\\k = 76 + 27 = 103[/tex]
Substituting the value of c and k in (i)
[tex]T = \frac{-9}{2}x + 103[/tex]
Where "x" is in thousands of feet
Thus the required linear equation is found
The linear equation that represents the temperature T at an elevation x on the mountain (where x is in thousands of feet) is T = -4.5x + 103.
Explanation:
This is a problem involving linear equations in Mathematics. We are given two data points, (6, 76) and (12, 49) where the first value in each pair is an elevation (in thousands of feet) and the second value is the corresponding temperature in degrees Fahrenheit. We can use these points to derive a linear equation of the form T = mx + c where T is the temperature, m is the slope, x is the elevation, and c is the y-intercept. The slope of the line m can be calculated using the formula (y2-y1)/(x2-x1) = (49-76)/(12-6) = -27/6 = -4.5. Therefore, every thousand feet in elevation leads to a temperature drop of 4.5 degrees Fahrenheit. To calculate the y-intercept c we can substitute x and y values from one of our points into the linear equation. For instance, using point (6, 76) we get 76 = -4.5*6 + c, which gives c = 103. Therefore, the linear equation to find the temperature T at an elevation x (in thousands feet) is T = -4.5x + 103.
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how do you graph y>3x-4
Answer:
Given inequality:
[tex]y>3x-4[/tex]
To graph it.
Solution:
In order to graph the given inequality, we will first graph the equation of the line by replacing the inequality sign with equal to sign.
Thus, we will graph the line [tex]y=3x-4[/tex]
On comparing the line equation with standard equation [tex]y=mx+b[/tex] where [tex](0,b)[/tex] represents the y-intercept point of the line, we can conclude the y-intercept point for the given line is [tex](0,-4)[/tex]
We can find another point by plugging in [tex]x=1[/tex] in the equation.
So, we have:
[tex]y=3(1)-4[/tex]
[tex]y=3-4[/tex]
[tex]y=-1[/tex]
So, the other point is [tex](1,-1)[/tex]
Potting (0,-4) and (1,-1) on the graph.
We can joint the two points and extend it infinity in order to graph the equation of line.
Now, since the inequality sign is greater than,
1) so we make sure that the line of the equation is a broken line as the line is not included in the solution for the inequality.
2) The part of the graph lying above the line would be shaded as the solution for the inequality.
The James family hosted an independent day party they expected 70 gusts but 7 times fewer showed up how many phone attend the party
Answer:10 people
Step-by-step explanation:
7 times less showed up so, 70 divided by 7 is 10. 10 guests attended.
The James family expected 70 guests for their party, but 7 times fewer showed up. By dividing the expected guest number by 7 (70 ÷ 7), we find that 10 guests attended the party.
Explanation:The James family expected 70 guests to attend their independent day party. However, 7 times fewer guests showed up than expected. We can calculate this by dividing the expected number of guests by 7.
Step 1: Identify the total number of guests expected which is 70.
Step 2: Divide the expected number of guests by 7. This is because the actual number of attendees was 7 times fewer than the expected.
Step 3: Perform the division: 70 ÷ 7 = 10.
So, 10 guests attended the independent day party hosted by the James family.
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NEED HELP )Where is the number 3 - 6 located on a horizontal number line?
3 units to the left of 3
3 units to the right of 3
6 units to the right of 3
6 units to the left of 3
Answer:
The right option is 6 units to the left of 3.
Step-by-step explanation:
In the number line, +x means x units moved to the right and -x means x units moved to the left.
Now, in our case, we have to locate the number 3 - 6 on the horizontal number line.
Now, we can start with position 3 on the number line then move 6 units to the left.
Therefore, the right option is 6 units to the left of 3. (Answer)
Answer:
Last option is correct.
6 units to the left of 3
Step-by-step explanation:
given:
The given number is.
[tex]=3-6[/tex]
[tex]=-3[/tex]
So, the number is -3.
The number -3 located on horizontal line as shown in the attached file.
Therefore, the number -3 located on the horizontal line is 6 units to the left of 3.
ALGEBRA 100 Points helppp please:))
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The sun is roughly 93,000,000 miles away from Earth
We can round this to 100,000,000
As a power of 10, this is [tex]10^{8}[/tex]
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Answer:
There are an estimated 1 quadrillion ants living on earth. A quadrillion as a power of 10 would be [tex]10^{15}[/tex], because there are 15 zeros in a quadrillion.
Evaluate AB/CD fo A = 5, B = -22, C = 4, and D = -6
Answer:
4.583 or 55/12
Step-by-step explanation:
A = 5, B = -22 and C = 4, D = -6. 5 multiplied by -22 is equal to -110, and 4 multiplied by -6 is equal to -24. Because a negative divided by a negative is a positive by the same rules of multiplication of negatives is a positive, just get rid of any negative signs in the equation. Now you have 110 / 24. 110/24 is equal to 4.583 or 55 / 12 in fraction form.
Factor completely 9x4y − 6x3y2 + 3x2y3.
Will give crown thingy
3x2y(3x2 − 2xy + y2)
3xy(3x2 − 2xy + y2)
3xy2(3x2 − 2xy + y2)
3x2y(3x2 + 2xy + y2)
Answer:
It's the first choice: 3x^2y(3x^2 - 2xy + y^2).
Step-by-step explanation:
9x4y − 6x3y2 + 3x2y3
We take the Greatest Common Factor which is 3x^2y:
= 3x^2y(3x^2 - 2xy + y^2).
Answer:
3x^2y(3x^2 - 2xy + y^2)
Step-by-step explanation:
You can give the guy above me a crown now lol 4 years later
The position of an object at time t is given by s(t) = 6 - 14t. Find the instantaneous velocity at t = 6 by finding the derivative.
By using the difference quotient
Answer:
It results -14 in either way
Step-by-step explanation:
Velocity As A Rate Of Change
The velocity of an object can be computed as the rate of change of its displacement (or position taken as a vector) over time. If we compute it as a derivative, it's called instantaneous velocity, and if computed as the slope of the function (difference quotient) at a certain point it's the average velocity
The position of the object as a function of time is
[tex]\displaystyle s(t)=6-14t[/tex]
Computing the derivative
[tex]\displaystyle s'(t)=-14[/tex]
We can see it's a constant value. If we use the slope or rate of change:
[tex]\displaystyle v=\frac{s_2-s_1}{t_2-t_1}[/tex]
Now let's fix two values for time
[tex]\displaystyle t_1=5\ sec,\ t_2=8\ sec[/tex]
and compute the corresponding positions, by using the given function
[tex]\displaystyle s_1=6-14(5)=-64[/tex]
[tex]\displaystyle s_2=6-14(8)=-106[/tex]
Now we compute the average velocity
[tex]\displaystyle v=\frac{-106-(-64)}{8-5}[/tex]
[tex]\displaystyle v=\frac{-106+64}{3}=\frac{-42}{3}[/tex]
[tex]\displaystyle v=-14[/tex]
We get the very same result in both ways to compute v. It happens because the position is related with time as a linear function, it's called a constant velocity motion.
The domain of u(x) is the set of all real values except 0 and the domain of v(x) is the set of all real values except 2. What are the restrictions on the domain of (u circle v) (x)?
options are
u(x) Not-equals 0 and v(x) Not-equals 2
x Not-equals 0 and x cannot be any value for which u(x) Equals 2
x Not-equals 2 and x cannot be any value for which v(x) Equals 0
u(x) Not-equals 2 and v(x) Not-equals 0
Answer:
C
Step-by-step explanation:
I just did the test
Answer:
c
Step-by-step explanation:
someone should pls answer my question
Answer:
what is your question???????
Two kids are roller skating. Amy, with a mass of 55 kg, is traveling forward at 3 m/s. Jenny, who
has a mass of 40 kg, is traveling in the opposite direction at 5 m/s. They crash into each other
and hold onto each other so that they move as one mass. How fast are they traveling?
Answer:
They traveling at [tex]0.37\ m/s[/tex] in backward direction.
Step-by-step explanation:
Given mass of Ammy [tex]m_1=55kg[/tex]
and velocity is forward at [tex]v_1=3m/s[/tex]
Also, mass of Jenny [tex]m_2=40kg[/tex]
Who is travelling in opposite direction [tex]v_2=-5m/s[/tex]
Let velocity in forward direction is positive and velocity in backward direction is negative.
Also, velocity after crash is [tex]v[/tex]
As they crashed into each other and they moved as one mass. We can apply principle of conservation of momentum.
Conservation of momentum says momentum before collision should equal to momentum after collision.
[tex]m_1v_1+m_2v_2=(m_1+m_2)v[/tex]
[tex](55\times3)+(40\times(-5))=(55+40)v\\\\165-200=95v\\\\-35=95v\\\\v=\frac{-35}{95}=-0.368m/s[/tex]
So, velocity after collision [tex]v[/tex]≅[tex]-0.37m/s[/tex] is in opposite direction. That is the direction of Jenny.
Six times a larger number is equal to the sum of a smaller number and 18. The difference of twice the larger number and the
smaller number is 6. Let x represent the smaller number and y represent the larger number. Which equations represent the
situation?
y = 6x+18
y = 2x-6
o y = 6(x+18)
y = 2(x-6)
oy-ax+3
y-1x+6
The set of equations that represent this situation is:
[tex]y = \frac{1}{6}x + 3[/tex]
[tex]y = \frac{1}{2}x + 3[/tex]
Solution:
Let "x" represent the smaller number
Let "y" represent the larger number
Given that,
Six times a larger number is equal to the sum of a smaller number and 18
Here "times" represents multiplication
Six times a larger number = sum of a smaller number and 18
6 x larger number = smaller number + 18
6y = x + 18
Thus,
[tex]y = \frac{1}{6}(x + 18)\\\\y = \frac{1}{6}x + 3[/tex]
Also given that difference of twice the larger number and the smaller number is 6
twice the larger number - smaller number = 6
2y - x = 6
Thus,
2y = x + 6
[tex]y = \frac{1}{2}(x + 6)\\\\y = \frac{1}{2}x + 3[/tex]
Thus the set of equations that represent this situation is:
[tex]y = \frac{1}{6}x + 3[/tex]
[tex]y = \frac{1}{2}x + 3[/tex]
Answer:
the correct answer is D
Step-by-step explanation:
Your teacher is giving you a test worth 100 points containing 40 questions. There are two point and to
ur point questions on the test. How many of each type of question are on the test?
Answer:
There are 30 two point questions and 10 four point questions on the test.
Step-by-step explanation:
Given:
Your teacher is giving you a test worth 100 points containing 40 questions. There are two point and four point questions on the test.
Now, to find number of each type of question are on the test.
Let the two point questions be [tex]x[/tex].
And let the four point questions be [tex]y[/tex].
So, total questions:
[tex]x+y=40.[/tex].........( 1 )
⇒ [tex]y=40-x.[/tex]
Now, total number of points of the questions on the test:
[tex]2x+4y=100.[/tex]
Substituting the value of [tex]y[/tex]:
⇒ [tex]2x+4(40-x)=100[/tex]
⇒ [tex]2x+160-4x=100[/tex]
⇒ [tex]160-2x=100[/tex]
Adding both sides by [tex]2x[/tex] we get:
⇒ [tex]160=100+2x[/tex]
Subtracting both sides by 100 we get:
⇒ [tex]60=2x[/tex]
Dividing both sides by 2 we get:
⇒ [tex]30=x[/tex]
⇒ [tex]x=30[/tex].
The number of two point questions = 30.
Putting the value of [tex]x[/tex] in the equation ( 1 ) we get:
[tex]30+y=40.[/tex]
Subtracting both sides by 30 we get:
⇒ [tex]y=10.[/tex]
The number of four point questions = 10.
Therefore, there are 30 two point questions and 10 four point questions on the test.
The graphs of y=x-3 and y = 3x -4 intersect at
approximately
1) (0.38,-2.85), only
| 2) (2.62,3.85), only
3) (0.38,-2.85) and (2.62,3.85)
4) (0.38, -2.85) and (3.85,2.62)
Answer:
Option 3) (0.38,-2.85) and (2.62,3.85)
Step-by-step explanation:
The correct question is
The graphs of y=x^2-3 and y=3x-4 intersect at approximately...
we have
[tex]y=x^2-3[/tex] ----> equation A
[tex]y=3x-4[/tex] ----> equation B
Solve the system by graphing
Remember that the solution of the system is the intersection point both graphs
Equate equation A and equation B
[tex]x^2-3=3x-4[/tex]
[tex]x^2-3x-3+4=0[/tex]
[tex]x^2-3x+1=0[/tex]
The formula to solve a quadratic equation of the form
[tex]ax^{2} +bx+c=0[/tex]
is equal to
[tex]x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}[/tex]
in this problem we have
[tex]x^2-3x+1=0[/tex]
so
[tex]a=1\\b=-3\\c=1[/tex]
substitute in the formula
[tex]x=\frac{-(-3)\pm\sqrt{-3^{2}-4(1)(1)}} {2(1)}[/tex]
[tex]x=\frac{3\pm\sqrt{5}} {2}[/tex]
so
[tex]x_1=\frac{3+\sqrt{5}} {2}=2.62[/tex]
[tex]x_2=\frac{3-\sqrt{5}} {2}=0.38[/tex]
Find the values of y (substitute the value of x in equation A or equation B)
For x=2.62 ----> [tex]y=(2.62)^2-3=3.85[/tex]
For x=0.38 ----> [tex]y=(0.38)^2-3=-2.85[/tex]
therefore
The intersection points are approximately (0.38,-2.85) and (2.62,3.85)
determine the equation of the parabola passing through the points (-3,13), (0,1), and (1, -7)
Answer:
y=-5x+1
Step-by-step explanation:
The equation is: y=mx+b
m = the slope of the line
b = the y-intercept (0,b)
The y-intercept is (0,1) so b = (0,1)
So the equation would be y =mx+1
Now in order to calculate the slope, the equation is:
y₂-y₁ over
x₂-x₁
So we should use the points (-3,13) and (1,-7).
-7-13 over (over means a fraction symbol)
1+3
Simplify:
-20 over 4 =-5/1 = -5
M=-5
So the equation is now:
y=-5x+1
Answer:
Step-by-step explanation:
You need to do some solving simultaneously to get these values. Your quadratic equation is of the form
[tex]ax^2+bx+c=y[/tex]
Use the coordinates you've been given to solve 3 equations. It will be super simple if we start with the coordinate (0, 1). Here's why (obvious after some substitution is done):
[tex]a(0)^2+b(0)+c=1[/tex] which gives us that
c = 1. Now we have a variable to plug in for c to solve for a and b. Again, we have coordinates that we can use to create 2 more equations:
[tex]a(-3)^2+b(-3)+1=13[/tex] and, simplified:
9a - 3b = 12
and the second equation is:
[tex]a(1)^2+b(1)+1=-7[/tex] and, simplified:
a + b = -8
Now combine the 2 bold equations and solve by elimination or substitution to find either a or b. I chose elimination and multiplied the second equation by 3 to get a new equation:
3a + 3b = -24
Using the elimination method:
9a - 3b = 12
3a + 3b = -24
You can see that the b's subtract each other away, leaving us with
12a = -12 so
a = -1
Now plug -1 in for a to solve for b:
-1 + b = -8 so
b = -7 and the quadratic is
[tex]-x^2-7x+1=y[/tex]