Answer:
you mulitple the two bottomz by the other number
example 3/4 and 2/8
8 is a common mulitple so 3/4 becomes 6/8 and now they have common denominators
Step-by-step explanation:
example 3/4 and 2/8
8 is a common mulitple so 3/4 becomes 6/8 and now they have common denominators
and the numerator gets multipled with the same number as the denominator
Suppose the function g(x) = 7x + 6 is translated down 9 units to become a new function, h(x). What's the equation of the new function?
Answer:
g(x)=7x-3
Step-by-step explanation:
the y axis becomes -3 because 6-9=-3
What is the equation of a parabola with (4,6) as its focus and y = 2 as its directrix
Answer:
The equation of the parabola is (x - 4)² = 8(y - 4)
Step-by-step explanation:
* Lets revise the equation of a parabola
- If the equation is in the form (x − h)² = 4p(y − k), then:
• Use the given equation to identify h and k for the vertex, (h , k)
• Use the value of h to determine the axis of symmetry, x = h
• Use h , k and p to find the coordinates of the focus, (h , k + p)
• Use k and p to find the equation of the directrix, y = k − p
* Now lets solve the problem
∵ The directrix is y = 2
∴ The equation is (x - h)² = 4p(y - k)
∴ The focus is (h , k + p)
∵ The focus is (4 , 6)
∴ h = 4
∵ k + p = 6 ⇒ (1)
∵ The directrix is y = k - p
∴ k - p = 2 ⇒ (2)
* Add (1) and(2) to find k
∴ 2k = 8 ⇒ ÷ 2 for both sides
∴ k = 4
* Substitute the value of k in (1) to find p
∵ 4 + p = 6 ⇒ subtract 4 from both sides
∴ p = 2
* Now lets write the equation
∴ (x - 4)² = 4(2)(y - 4) ⇒ simplify
∴ (x - 4)² = 8(y - 4)
* The equation of the parabola is (x - 4)² = 8(y - 4)
Which is an equation of the circle with a radius of 9 units and center at
(–4, 2)?
A.
(x − 9)2 + (y + 4)2 = 4
B.
(x − 4)2 + (y + 2)2 = 81
C.
(x + 4)2 + (y − 2)2 = 81
D.
(x − 2)2 + (y + 4)2 = 81
We want (x - h)^2 + (y - k)^2 = r^2.
This circle is not centered at the origin.
The point we want is in the form
(h, k).
We are given that h = -4 and k = 2.
We also know that the radius is 9.
Let r = 9 leading to (9)^2 or 81.
We know substitute in the form given above for circles not centered at the origin.
(x - (-4)^2 + (y - 2)^2 = 81
(x + 4)^2 + (y - 2)^2 = 81
Answer: Choice C
Find the distance between these points.
W(-6, -8), X(6, 8)
20
10
√8
20 is the correct answer
For this case we have that by definition, the distance between two points is given by:
[tex]d = \sqrt {(x_ {2} -x_ {1}) ^ 2+ (y_ {2} -y_ {1}) ^ 2}[/tex]
We have the following points:
[tex](x_ {1}, y_ {1}) = (- 6, -8)\\(x_ {2}, y_ {2}) = (6,8)[/tex]
Substituting:
[tex]d = \sqrt {(6 - (- 6)) ^ 2+ (8 - (- 8)) ^ 2}\\d =\sqrt {(6 + 6) ^ 2 + (8 + 8) ^ 2}\\d = \sqrt {(12) ^ 2 + (16) ^ 2}\\d = \sqrt {144 + 256}\\d = \sqrt {400}\\d = 20[/tex]
ANswer:
20
Please help me out if possible.
Answer:
C
Step-by-step explanation:
Plotting the points in a sketch quickly shows that the vertices are not at right angles to each other, thus excluding rectangle and square whose vertices are at right angles.
The best selection is a rhombus
A thirty year old man is considering buying a one-year life insurance policy for $500 with a coverage of $150,000. The probability of his living through the year is 0.994. Based ONLY on this information, should the man buy the policy?
Answer:
The man should not buy the policy.
Step-by-step explanation:
A life insurance policy is a contract that pays a sum assured to a policy holder upon death, either immediately or at the end of year of death. The policy holder pays a premium amount in advance to cater for the future benefits (sum assured).
In the scenario presented, the man is 30 years old with a probability of 0.994 of survival with respect to mortality. The high probability of being alive through the year implies that the man is very unlikely to die and thus the probability of receiving the coverage amount is too minimal
Answer: The expected value is $400, so the man should buy the insurance policy.
Step-by-step explanation:
(150,000-500)(.006)-500(.994)=400
Generalize the pattern by finding the nth term. 6, 10, 14, 18, 22, ... options: A. 4n B. 4n + 2 C. 4n + 10 D. 6n + 4
ANSWER
B.
[tex] 4n + 2[/tex]
EXPLANATION
The given pattern is:
6, 10, 14, 18, 22, ...
The first term if the pattern is a=6.
The common difference among the terms is
[tex]d = 10 - 6 = 4[/tex]
The general pattern can be found using the formula:
[tex]f(n)=a+d(n-1)[/tex]
We substitute the values to get,
[tex]f(n)=6+4(n-1)[/tex]
Expand to get;
[tex]f(n)=6+4n-4[/tex]
[tex]f(n) = 4n + 2[/tex]
The correct answer is B.
YES IM LOOKING AT YOU ANSWER PLEAAASE
Answer:
The right answer is figure B
Step-by-step explanation:
* Lets talk about the complex number
- The complex number z = a + bi consists of two part:
# a is the real part and represented graphically by the x-axis
# b is the imaginary part and represented graphically by the y-axis
- We can add and subtract them by adding or subtracting the real parts
together and the imaginary parts together
# Ex: if z1 = 2 + 3i and z2 = -1 - i
∴ z1 + z2 = (2 + -1) + (3 + -1)i = 1 + 2i
∴ z1 - z2 = (2 - -1) + (3 - -1)i = (2 + 1) + (3 + 1)i = 3 + 4i
* Now lets solve the problem
- Let find from the graph z1 , z2 and point A
- Look to the any graph and find z1 through the axes
- We moved 6 units on the x-axis (real part) and 7 units up
(imaginary part)
∴ z1 = 6 + 7i
- Similarly find z2 through the axes
- We moved 5 units on the x-axis (real part) and 2 units down
(imaginary part)
∴ z2 = 5 - 2i
* Now lets solve z1 - z2
∵ z1 = 6 + 7i and z2 = 5 - 2i
∴ z1 - z2 = (6 + 7i) - (5 - 2i) = (6 - 5) + (7 - -2)i = 1 + 9i
* Lets find in which figure the coordinates of A are (1 , 9)
∵ In figure A point A is (1 , 6)
∵ In figure B point A is (1 , 9)
∵ In figure C point A is (11 , 5)
∵ In figure D point A is (11 , 9)
∴ The right answer is figure B
PLEASE HELP ASAP 60 PTS + BRAINLIEST TO RIGHT/BEST ANSWER
Answer:
x(x-3)(x+2)
Step-by-step explanation:
x^3-x^2-6x
First subsitute out x:
x(x^2-x-6)
Find the multiples of the x's:
x(x-3)(x+2)
Answer:
x(x-3)(x+2)
Step-by-step explanation:
x^3-x^2-6x
First subsitute out x:
x(x^2-x-6)
Find the multiples of the x's:
x(x-3)(x+2)
Step-by-step explanation:
Solve the following system of equations:
-8x+3y=7
13-3y=-17
X=?
Y=?
Answer:
x = -2 and y = -3
Step-by-step explanation:
It is given that,
-8x + 3y =7 ----(1)
13x - 3y =-17 -----(2)
To find the value of x and y
eq(1) + eq(2) ⇒
-8x + 3y = 7 ----(1)
13x - 3y = -17 -----(2)
5x + = -10
x = -10/5 = -2
Substitute value of x in eq (1)
-8x + 3y =7 ----(1)
-8 * -2 + 3y = 7
16 + 3y = 7
3y = 7 - 16 = -9
y = -9/3 = -3
Therefore x = -2 and y = -3
For this case we must solve the following system of equations:
[tex]-8x + 3y = 7\\13x-3y = -17[/tex]
If we add both equations we have:
[tex]-8x + 13x + 3y-3y = 7-17\\5x = -10\\x = \frac {-10} {5}\\x = -2[/tex]
We find the value of the variable "y":
[tex]3y = 7 + 8x\\y = \frac {7 + 8x} {3}\\y = \frac {7 + 8 (-2)} {3}\\y = \frac {7-16} {3}\\y = \frac {-9} {3}\\y = -3[/tex]
Thus, the solution of the system is (-2, -3)
ANswer:
(-2, -3)
15pts awarded and brainliest will be chosen!!!!!
The ideal length of a particular metal rod is 30.5 cm. The measured length may vary from the ideal length by at most 0.015 cm. What is the range of acceptable lengths for the rod?
Answer: OPTION B
Step-by-step explanation:
Let be "x" the acceptable lengths for the rod.
You know that the ideal length of the metal rod is 30.5 centimeters and the measured length may vary from the ideal length by at most 0.015 centimeters.
Therefore, knowing this, you can say that the acceptable lengths must be:
[tex]30.5cm-0.015cm\leq x\\\\30.485\leq x[/tex]
[tex]x \leq 30.5cm+0.015cm\\\\x\leq 30.515[/tex]
Therefore, the range of acceptable lengths for the rod is the following:
[tex]30.485\leq x\leq 30.515[/tex]
This range matches with the one shown in the option B.
What is the volume of this solid?
A. 1104
B. 132
C. 96
D. 276
For this case we have that the volume of the figure is composed of the volume of a prism and the volume of a pyramid:
The volume of the prism is given by:
[tex]V = A_ {b} * h[/tex]
Where:
[tex]A_ {b}[/tex]: It is the area of the base
h: It's the height
Substituting:[tex]V = 6 * 6 * 6\\V = 216 \ units ^ 3[/tex]
The volume of the pyramid is given by:
[tex]V = \frac {1} {3} * L ^ 2 * h[/tex]
Where:
[tex]L ^ 2:[/tex]It is the area of the base
h: It's the height
Substituting:
[tex]V = \frac {1} {3} * 6 ^ 2 * 5\\V = \frac {1} {3} * 36 * 5\\V = 60units ^ 3[/tex]
We add and we have:
[tex]V = 276 \ units ^ 3[/tex]
ANswer:
Option D
When Marcie stands 5 feet from a light post, her shadow is 6 feet long. Find the height of the light post if Marcie is 4 feet tall.
22/3 or 7.3333333333333333333333333333 or 7 1/3 feet
K-12 Algebra 2. PLEASE HELP! 25 points
For a research project, students are asked to study how often students at an online high school look at social media while doing schoolwork.
A) Give an example of a question she could ask on her survey
B) How could Sofie select a simple random sample of students to take her survey?
C) she gives out 80 surveys but receives only 32 completed surveys. What are the sample and population for Sofies research?
D) of the 32 students who completed surveys, 16 said they use social media while doing schoolwork. If sofie uses only the completed surveys, what conclusion could she make about the percent of all high school students who use social media while doing schoolwork?
DO NOT ANSWER IF YOU DO NOT KNOW. I WILL REPORT YOUR ANSWER!!!!’
Answer:
A. how much of the students time is spent on social media during school hours.
B. By using some kind of selection technique Like Having students draw number from a hat, who ever have the specific numbers will take her survey.
C. The population for Sofies research would be a rate of 5/2. For every 5 people who take the survey only 2 turned it in.
D. She would conclude that 1 out of every 2 or 50 percent of students use social media while doing school work.
Step-by-step explanation:
The percent of all high school students who use social media while doing schoolwork, if Sofie uses only the completed surveys, is 50%.
What is random sample?Random sample is the way to choose a number or sample in such a manner that each of the sample of the group has an equal probability to be chosen.
For a research project, students are asked to study how often students at an online high school look at social media while doing schoolwork.
A) Example of a question she could ask on her survey-Sofie can use the question as, how many times a student look at social media while doing schoolwork?
B) The way, Sofie select a simple random sample of students to take her survey-Sofie can use a simple random sampling technique to select a simple random sample of students to take her survey.
C) Sample and population for Sofie's research-
As Sofie gives out 80 surveys but receives only 32 completed surveys. Thus, the sample is data of 32 completed surveys and the population is total 80 surveys.
D) Percent of all high school students who use social media while doing schoolwork-Of the 32 students who completed surveys, 16 said they use social media while doing schoolwork. Thus, the percentage is,
[tex]P=\dfrac{16}{32}\times100\\P=50\%[/tex]
Hence, the percent of all high school students who use social media while doing schoolwork if Sofie uses only the completed surveys, is 50%.
Learn more about the random sample here;
https://brainly.com/question/17831271
The equation for the position of an object at time t is represented by the equation f(t)=4t^2-2t. Which equation represents the instantaneous velocity at any given time, t?
Answer:
The equation that represents the instantaneous velocity at any given time, t is:
[tex]v (t) = 8t -2[/tex]
Step-by-step explanation:
In physics, the equation that describes the instantaneous velocity of an object is the derivative of the position of this object as a function of time.
In this problem we have the function that describes the position of the object at a time t.
[tex]f (t) = 4t ^ 2-2t[/tex]
Therefore to obtain the instantaneous velocity we derive f (t) with respect to time
[tex]\frac{df(t)}{dt} = 2(4)t-2\\\\\frac{df(t)}{dt} = 8t-2 = v (t)[/tex]
Finally the equation of velocity is:
[tex]v (t) = 8t -2[/tex]
Please help me please
Answer:
x = 36
Step-by-step explanation:
The angles 3x - y and 2x + y form a straight angle and are supplementary, so
3x - y + 2x + y = 180
5x = 180 ( divide both sides by 5 )
x = 36
-----------------------------------------------
5y and 3x - y are vertical angles and congruent, hence
5y = 3x - y ( add y to both sides )
6y = 3x ← substitute x = 36
6y = 3 × 36 = 108 ( divide both sides by 6 )
y = 18
Tax returns filled manually have a 20% chance of containing errors while tax returns filled electronically have a .05% chance of containing the same if 2.7 million tax returns are filed each way how many more erroneous manually filed returns will there be than erroneous electronically filed returns
Answer:
538,650
Step-by-step explanation:
We must first find how many errors there will be if filed manually and if filed electronically
Manually: 2,700,000*20% or 2,700,000*.2
Answer: 540,000 errors
Electronically: 2,700,000*.05% or 2,700,000*.0005
Answer: 1,350 errors
We must then find the difference; 540,000-1,350=538,650
Answer:
538,650.
Step-by-step explanation:
Number of erroneous manual returns = 20% of 2.7 million
= 0.20 * 2,700,00 = 540,000.
Number for electronically returned = 2,700,000 * 0.0005 = 1350.
Difference = 540,00 - 1350 = 538,650.
cats can add but they do not multiply
Lol ok where’s the question is this just for fun?
Please help me out please
Answer:
x = 30°
Step-by-step explanation:
x° is the other acute angle of the right triangle with 60° as the acute angle at the center of the circle. (The tangent line makes a right angle with the radius at the point of tangency.)
Please help me out please
Answer:
True
Step-by-step explanation:
∠4 and ∠5 are congruent and alternate angles, hence
A and B are parallel lines
HURRY!!!!
The graph shows the education levels of individuals in one town. If 500 people were surveyed, how many have a college degree or some college?
135
175
300
310
Answer:
310
Step-by-step explanation:
62 percent of 500 is 310
Hope this helps :)
Answer:
Option D, 310
Step-by-step explanation:
In the given graph 500 people were surveyed.
Now we have to calculate the number of individuals who have a college degree or some college.
Now from the given pie chart.
College degree individuals = 25% of 500
= 0.25 × 500
= 175
Individual with some college = 27% of 500
= 0.27 × 500
= 135
So the total of college dgree + some college = 135 + 175 = 310
Option D 310 is the answer.
please help, i suck at these but i think its 3/6
Answer:
it is 1/6 because there is 6 colors and the probability of getting 3 which is 1 number is 1 out of 6
Step-by-step explanation:
A piece of gum is stuck at the bottom of a tire...
Answer:
Step-by-step explanation:
This is the pre-calculus version of the arc length problem. The formula we need for this is:
[tex]s=r\theta[/tex]
where s is the arc length (here, the distance she has to travel to get the gum off the tire), r is the radius, and theta is the angle given (the angle here always always has to be in radians!!!) Filling in accordingly, we get
[tex]s=(6.5)(\frac{37\pi }{90})[/tex]
Do the math. You need the answer rounded to the nearest inch, so that means you have to multiply in the pi (I used 3.1415):
s = 8 inches
Answer:
8
Step-by-step explanation:
The ordered pair (-2,-1) is a solution to which of the following equations?
The equation that has (-2, -1) as a solution is, C. 4x - y = -7.
How to Find the Ordered Pair That is a Solution to an Equation?To determine if an ordered pair is a solution to an equation, plug in the values of the coordinates of the pair into the equation to check if it will make it true
If it makes it true, it is a solution, otherwise, it is not if it does not make the equation true.
Given the ordered pair, (-2, -1) substitute the values to check which will be true:
-4(-2) - (-1) = 7
9 = 7 [not true].
4x + y = -7
4(-2) + (-1) = -7
-9 = -7 [not true]
4x - y = -7
4(-2) - (-1) = -7
-7 = -7
Therefore, the equation is: C. 4x - y = -7.
Learn more about the solution of an equation on:
#SPJ1
Complete Question:
The ordered pair (-2,-1) is a solution to which
of the following equations?
A.-4x - y = 7
B. 4x+y=-7
C. 4x - y = -7
D. -4x + y = -7
A delicatessen offers 4 different breads, 4 cheeses, and 6 different meats. In how many ways can a sandwich be made with 1 bread, 2 cheese and 3 meats?
360
420
480
540
Answer:
360
Step-by-step explanation:
Answer:
360
Step-by-step explanation:
Give coordinates X(3,-4) and Y(-3,-4), midpoint D of XY is?
A. D(-4,0)
B. D(-3,4)
C. D(3,-4)
D. D(0,-4)
Answer:
[tex]\large\boxed{D.\ D(0,\ -4)}[/tex]
Step-by-step explanation:
The formula of a midpoint of the segment"
[tex]\left(\dfrac{x_1+x_2}{2};\ \dfrac{y_1+y_2}{2}\right)[/tex]
We have the points X(3, -4) and Y(-3 -4).
Substitute:
[tex]x=\dfrac{3+(-3)}{2}=\dfrac{0}{2}=0\\\\y=\dfrac{-4+(-4)}{2}=\dfrac{-8}{2}=-4[/tex]
If you shift the linear parent function, f(x) = x, down 7 units, what is the equation of the new function?
A. g(x) = 7x
B. g(x) = x – 7
C. g(x) = x
D. g(x) = x + 7
if you shift it down 7, the new equation would be
g(x)=x-7
hope this helps
Answer:
B
Step-by-step explanation:
An upward shift or a downward shift is reflected in the +k or -k (k being some real number). If there is a number "stuck" to the x, that reflects the steepness (slope) of the line. The slope of this line is 1, and the y-intercept (where it goes through the y-axis) is down 7 from the origin. B is your answer.
Solve the system of equations given
5x+2y=9
2x-3y=15
A. (3,-3)
B. (-3,12)
C. (12,-3)
D. (-3,3)
Answer:
{x = 3 , y = -3 thus the answer is A
Step-by-step explanation:
Solve the following system:
{5 x + 2 y = 9 | (equation 1)
{2 x - 3 y = 15 | (equation 2)
Subtract 2/5 × (equation 1) from equation 2:
{5 x + 2 y = 9 | (equation 1)
{0 x - (19 y)/5 = 57/5 | (equation 2)
Multiply equation 2 by 5/19:
{5 x + 2 y = 9 | (equation 1)
{0 x - y = 3 | (equation 2)
Multiply equation 2 by -1:
{5 x + 2 y = 9 | (equation 1)
{0 x+y = -3 | (equation 2)
Subtract 2 × (equation 2) from equation 1:
{5 x+0 y = 15 | (equation 1)
{0 x+y = -3 | (equation 2)
Divide equation 1 by 5:
{x+0 y = 3 | (equation 1)
{0 x+y = -3 | (equation 2)
Collect results:
Answer: {x = 3 , y = -3
Answer:
A) 5x+2y=9
B) 2x-3y=15
Multiply A) by 1.5
A) 7.5x +3y = 13.5 then add it to B)
B) 2x-3y=15
9.5x = 28.5
x = 3
5*3 + 2y=9
2y = -6
y = -3
answer is A
Step-by-step explanation:
What is the formula for the sum of the interior angles of a polygon
Answer:
Sum of the interior angles = (n-2) x 180°
where
n is the number of sides of the polygon
Step-by-step explanation:
The formula for the sum of the interior angles of a polygon is:
[tex]sum=(n-2)*180[/tex]
where
[tex]sum[/tex] is the sum of the interior angle of the polygon
[tex]n[/tex] is the number of polygons
Let's check the formula using an example:
We want to find the sum of the interior angles of a square, we know that a square has 4 sides, so [tex]n=4[/tex].
Replacing values
[tex]sum=(4-2)*180[/tex]
[tex]sum=(2)*180[/tex]
[tex]sum=360[/tex]
We can apply the same procedure to any convex polygon with n sides.
Answer:
The fomula for the sum of the interior angles of a polygon is:Sum of the interior angles = (n - 2) × 180°.
Where n is the number of sides of the polygon.
Explanation:
The formula (n - 2) × 180° is valid for any convex polygon.
A convex polygon is one whose interior angles (every interior angle) measure less than 180°.
You can prove and remember that formula following this reasoning:
If you pick one vertex of the polygon you can build (n - 2) diagonals, and so split the figure into n - 2 triangles.Since, the sum of the interior angles of any trianle is 180°, the sum of the total angles is (n - 2) × 180°. And this is the formula for the sum of the interior angles of a polygon.For example, for a pentagon, a polygon with 5 sides, you can can draw 5 - 2 = 3 diagonals from one vertex, and so obtain 3 triangles. Then the sum of the interior angles shall be (n - 2) × 180° = (5 - 2) × 180° = 3 × 180° = 540°.
A weather forecast predicts a 25% probability of thunderstorms for tomorrow and a 10% probability of thunderstorms and hail. What is the probability that there is hail tomorrow given that there are thunderstorms?
Answer:
[tex]P(B | A)=0.4=40\%[/tex]
Step-by-step explanation:
Call A to the event in which there are electrical storms.
Call B the event in which there is hail.
Then, by definition.
The Probability of B given A is:
[tex]P(B | A)=\frac{P(B\ and\ A)}{P(A)}[/tex]
We know that:
[tex]P(B\ and\ A)= 10\%=0.1\\\\P(A) = 25\%=0.25[/tex]
Therefore
[tex]P(B | A)=\frac{0.1}{0.25}[/tex]
[tex]P(B | A)=0.4=40\%[/tex]
The conditional probability of hail given thunderstorms is calculated using the formula P(Hail | Thunderstorms) = P(Thunderstorms and Hail) / P(Thunderstorms). Given the probabilities of 10% for thunderstorms with hail and 25% for thunderstorms, the result is a 40% probability of hail when thunderstorms are present.
Explanation:The student is asking to find the conditional probability of hail occurring, given that thunderstorms are already happening. This is a probability question that involves understanding and applying the concept of conditional probability.
The probability of thunderstorms is given as 25% (or 0.25 in decimal form), and the probability of thunderstorms with hail is given as 10% (or 0.10 in decimal form). To find the probability of hail given thunderstorms, you use the formula for conditional probability which is P(Hail | Thunderstorms) = P(Thunderstorms and Hail) / P(Thunderstorms). The 'given' part is represented by the condition after the vertical bar '|', and the numerator is the probability of both thunderstorms and hail occurring.
Substituting the given values into the formula, we get P(Hail | Thunderstorms) = 0.10 / 0.25 = 0.40 or 40%. Therefore, if thunderstorms are occurring, there is a 40% probability that there is also hail.