Answer:
The solutions of the equation are √3 - 1/2 and -√3 - 1/2
Step-by-step explanation:
* Lets revise how to make the completing square
- The form of the completing square is (x - h)² + k, where h , k
are constant
- The general form of the quadratic is x² + bx + c, where b , c
are constant
- To change the general form to the completing square form equate
them and find the constant h , k
* Now lets solve the problem
∵ x² + x = 11/4 ⇒ subtract 11/4 from both sides
∴ x² + x - 11/4 = 0
- Put the equation equal the form of the completing square
∵ x² + x - 11/4 = (x - h)² + k ⇒ solve the bracket power 2
∴ x² + x - 11/4 = x² - 2hx + h² + k
- Equate the like terms
∵ x = -2hx ⇒ divide both sides by x
∴ 1 = -2h ⇒ divide both sides by -2
∴ -1/2 = h
∴ the value of h = -1/2
∵ -11/4 = h² + k
- Substitute the value of h
∴ -11/4 = (-1/2)² + k
∴ -11/4 = 1/4 + k ⇒ subtract 1/4 from both sides
∴ -12/4 = k
∴ k = -3
∴ The value of k is -3
- Substitute the value of h and k in the completing square form
∴ (x - -1/2)² + (-3) = 0
∴ (x + 1/2)² - 3 = 0 ⇒ add 3 to both sides
∴ (x + 1/2)² = 3 ⇒ take square root for both sides
∴ x + 1/2 = √3 OR x + 1/2 = -√3
∵ x + 1/2 = √3 ⇒ subtract 1/2 from both sides
∴ x = √3 - 1/2
OR
∵ x + 1/2 = -√3 ⇒ subtract 1/2 from both sides
∴ x = -√3 - 1/2
* The solutions of the equation are √3 - 1/2 and -√3 - 1/2
What is the tangent ratio for B
Answer:
C [tex]\frac{2}{1}[/tex]
Step-by-step explanation:
Recall the mnemonics SOH-CAH-TOA
The tangent ratio is the ratio of the opposite side of the right triangle to the adjacent side.
From the diagram, the side opposite to <B is 2 units and the adjacent side is 1 unit.
This implies that;
[tex]\tan \angle B=\frac{2}{1}[/tex]
The correct choice is C
How do I solve this?
Answer:
[tex]\large\boxed{4\sqrt{-81}+\sqrt{-25}=41i}[/tex]
Step-by-step explanation:
[tex]i=\sqrt{-1}\\\\\sqrt{-81}=\sqrt{(81)(-1)}=\sqrt{81}\cdot\sqrt{-1}=9i\\\\\sqrt{-25}=\sqrt{(25)(-1)}=\sqrt{25}\cdot\sqrt{-1}=5i\\\\4\sqrt{-81}+\sqrt{-25}=4(9i)+5i=36i+5i=41i[/tex]
A company that produces video games has hired you to set the sale price for its newest game. based on the production costs and consumer demands , the company has concluded that the equation p(x) = -0.3x^2 + 45x - 1000 represents the profit p (in dollars) for x individual games sold. What will the company's profit be if 100 games are sold?
Answer: 500 dollars
You just plug in 100 to the x’s in the equation
The company's profit be if 100 games are sold is $41100
The profit function is given as:
[tex]p(x) = -0.3x^2 + 45x - 1000[/tex]
When the number of games is 100, it means that
x = 100
So, we substitute 100 for x in the profit function
[tex]p(x) = -0.3x^2 + 45x - 1000[/tex] becomes
[tex]p(100) = -0.3(100)^2 + 45(100) - 1000[/tex]
Evaluate the exponents
[tex]p(100) = -0.3(10000) + 45(100) - 1000[/tex]
Open all brackets
[tex]p(100) = -3000 + 45100 - 1000[/tex]
Evaluate like terms
[tex]p(100) = 41100[/tex]
Hence, the company's profit be if 100 games are sold is $41100
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30 points and brainliest!! \Part A: A number is increased by 54. The sum is then divided by 9. The result is 21.
Write an equation to represent the description above. Use n for the number.
Equation: _____________________________
Part B: Find the value of n. Show your work.
n = __________________________________
Part C: Choose two numbers and use them to do the following:
Write an equation that shows your first number added to n equal to your second number. Solve your equation for n.
Equation: _____________________________
Solution: ______________
Answer:
Part A) The equation that represent the situation is [tex]\frac{n+54}{9}=21[/tex]
Part B) The value of n is [tex]n=135[/tex]
Part C) The equation is [tex]35+n=60[/tex] and the solution is [tex]n=25[/tex]
Step-by-step explanation:
Part A) A number is increased by 54. The sum is then divided by 9. The result is 21. Write an equation to represent the description above. Use n for the number
Let
n-----> the number
we know that
The linear equation that represent this situation is equal to
[tex]\frac{n+54}{9}=21[/tex]
Part B) Find the value of n
we have
[tex]\frac{n+54}{9}=21[/tex]
solve for n
Multiply by 9 both sides
[tex]n+54=21*9[/tex]
[tex]n+54=189[/tex]
Subtract 54 both sides
[tex]n=189-54[/tex]
[tex]n=135[/tex]
Part C) Choose two numbers and use them to do the following:
Write an equation that shows your first number added to n equal to your second number. Solve your equation for n
I choose 35 and 60
[tex]35+n=60[/tex]
Solve for n
Subtract 35 both sides
[tex]n=60-35[/tex]
[tex]n=25[/tex]
If 1 dish of craft paint covers an area of 720 square centimeters, how many dishes of paint are required to paint the top surface and the lateral faces of the table shown in the diagram? Ignore the bottom of the tabletop and the legs.
(540 + 540 + 900 + 900) + (2160) = (Surface area of Lateral faces) + (Top) = 5040 sq cm.
5040 / 720 = dishes of craft paint = 7 dishes
Answer:
7 dishes
Step-by-step explanation:
You purchase an item at a store and have a total of $153.60.The cashier then adds a 5% tax to your total. If you pay with two 100$ bills how much change will you get back?
Answer:
38.72 change
Step-by-step explanation:
153.6 x 1.05 = 161.28
100 x 2 = 200
200-161.28 = 38.72
Answer:
42.36
Step-by-step explanation:
what is the value of g(3)?
a. 2
b. 3
c. 9
d. 14
The answer is 3 because you need to use the last equation which is x is greater than or equal to 3.it doesn't make sense to use any of the other two equations because it asked what is the value of g(3).hope this helps if it does please mark brainliest
The answer is 3 you’re welcome
What is the solution to this system of equations?
x + 2y − z = 3
2x − y + 2z = 6
x − 3y + 3z = 4
Answer: The system of equations has no solutions.
Step-by-step explanation:
Identify the equation as:
[tex]x + 2y - z=3[/tex] [Equation 1]
[tex]2x -y + 2z=6[/tex] [Equation 2]
[tex]x - 3y + 3z=4[/tex] [Equation 3]
Multiply [Equation 1] by -2 and add this to [Equation 2] :
[tex](-2)(x + 2y - z)=3(-2)[/tex]
[tex]\left \{ {{-2x - 4y +2z=-6} \atop {2x -y + 2z=6}} \right.\\ ..........................\\-5y+4z=0[/tex]
Find another equation of two variables: Multiply [Equation 3] by -2 and add this to [Equation 2]:
[tex](-2)(x - 3y + 3z)=4(-2)[/tex]
[tex]\left \{ {{2x -y + 2z=6} \atop {-2x +6y -6z=-8}} \right.\\........................\\5y-4z=-2[/tex]
Then you get this new system of equations. When you add them, you get:
[tex]\left \{ {{-5y+4z=0} \atop {5y-4z=-2}} \right.\\..................\\0=-2[/tex]
Since the obtained is not possible, the system of equations has no solutions.
The solution to the system of equations x + 2y - z = 3, 2x - y + 2z = 6, and x - 3y + 3z = 4 is (-1, 1, 2) utilizing substitution method.
Explanation:The subject of this question is to find a solution to the system of linear equations. We can solve this system by methods of either substitution, elimination or matrix - but let's use substitution. First, let's isolate x in the first equation: x = 3 - 2y + z. Then we substitute x into the second and the third equation:
2(3 - 2y + z) − y + 2z = 6(3 - 2y + z) − 3y + 3z = 4
After simplifying these equations, we find y = 1 and z = 2. Plugging these back into x = 3 - 2y + z, we get x = -1. Therefore, the solution to the system is (-1, 1, 2).
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Find the perimeter of an isosceles triangle ABC. Side AB=4, and the base BC=3. Angles B & C are both 70 degrees.
Answer:
11 units
Step-by-step explanation:
Since ∆ABC is isosceles, it means that at least two sides are congruent/equal in length.
Sides CA and AB are congruent, since BC is the base. So, CA = 4.
That means the perimeter is 4 + 4 + 3 = 11 un
In rabbits. brown fur B is dominant to white fur (b) and short fur (H) is dominant to long fur (h).
A brown. long-furred rabbit (Bbhh) is crossed with a white, short-furred rabbit (bbHh). Both the Band H traits
assort independently from one another
What percentage of the offspring will be brown with long fur?
The cross between Bbhh and bbHh yields genotypic frequencies
1/4 BbHh1/4 Bbhh1/4 bbHh1/4 bbhhso that 1/4 of the offspring should be expected to be brown with long fur (genotype Bbhh)
Answer:
1/4
Step-by-step explanation:
Four expressions are shown below:
4(8x + 2)
4(7x + 3)
32x + 8
28x + 12
Which two expressions are equivalent to 4(7x + 2 + x)?
It’s the first one and the third one
Answer: A and C
Step-by-step explanation:
What are the zeros of the quadratic function f(x) = 6x2 + 12x – 7?
x = –1 – and x = –1 +
x = –1 – and x = –1 +
x = –1 – and x = –1 +
x = –1 – and x = –1 +
It an expression or a way of saying f(x)=6x2+12-7
Answer:
[tex]x=-1+\frac{\sqrt{78} }{6}[/tex] and
[tex]x=-1-\frac{\sqrt{78} }{6}[/tex]
Step-by-step explanation:
[tex]f(x) = 6x^2 + 12x - 7[/tex]
To find out the zeros of the quadratic function, we apply quadratic formula
[tex]x=\frac{-b+-\sqrt{b^2-4ac}}{2a}[/tex]
From the given f(x), the value of a=6, b=12, c=-7
Plug in all the values in the formula
[tex]x=\frac{-12+-\sqrt{12^2-4(6)(-7)}}{2(6)}[/tex]
[tex]x=\frac{-12+-\sqrt{312}}{2(6)}[/tex]
[tex]x=\frac{-12+-2\sqrt{78}}{2(6)}[/tex]
Now divide each term by 12
[tex]x=-1+-\frac{\sqrt{78} }{6}[/tex]
We will get two values for x
[tex]x=-1+\frac{\sqrt{78} }{6}[/tex] and
[tex]x=-1-\frac{\sqrt{78} }{6}[/tex]
FRUIT The circle graph shows the results of a survey about students’ favorite fruit. If 300 students were surveyed, how many students chose bananas as their favorite type of fruit?
a.
222 students
b.
78 students
c.
26 students
d.
132 students
Answer:
B 78 students
Step-by-step explanation:
The answer is d. 132 students
Which of the following conditions make a pair of triangles congruent?
Answer:
SSS, SAS, ASA, AAS, and HL. These tests describe combinations of congruent sides and/or angles that are used to determine if two triangles are congruent.
Step-by-step explanation:
The width of a rectangle is fifteen feet less than its length. If the area of the rectangle is 54 square feet, find the width.
Answer:
3 ft
Step-by-step explanation:
It is because 3 times 18 is 54 and 3 is 15 less than 18
The width of a rectangle is 3 feet .
What is area of rectangle?The area can be defined as the amount of space covered by a flat surface of a particular shape. It is measured in terms of the "number of" square units (square centimeters, square inches, square feet, etc.)
According to the question
Let length of rectangle = x
The width of a rectangle is fifteen feet less than its length.
i.e,
Width of a rectangle = x - 15
Now,
Area of the rectangle = 54 square feet .
Length * Width = 54
x (x - 15 ) = 54
[tex]x^{2}[/tex] - 15x - 54 = 0
[tex]x^{2}[/tex] - (18-3)x - 54 = 0
[tex]x^{2}[/tex] - 18x + 3x - 54 = 0
x(x-18) +3(x-18) = 0
(x-18) (x+3) = 0
x= 18 , -3
length of rectangle = 18 feet
Width of a rectangle = 18 - 15
= 3 feet
Hence, The width of a rectangle is 3 feet .
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Paul bought a concert ticket for $25. He sold the ticket at a 35% markup. How much did Paul sell the ticket for? *
Answer:
33.75
Step-by-step explanation:
find 35 % of 25 then add that to 25.
He sold the ticket at $33.75.
What is Markup ?Markup is the amount by which a product is sold above its cost price.
It is given that
Cost Price of the ticket is $25
Selling price = ?
Markup = 35%
Selling Price = 1.35 * 25 = $33.75
Therefore he sold the ticket at $33.75.
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The cost of a cell phone varies directly with the number of minutes it is used. If it costs $52.36 to talk for
175 minutes, what is the cost to talk for 325 minutes?
Answer:
$97.24
Step-by-step explanation:
You can use a direct proportion.
175 is to $52.36 as 325 minutes is to x.
Use two ratios of minutes/dollars:
175/52.36 = 325/x
Cross multiply.
175x = 52.36 * 325
175x = 17,017
x = 17,017/175
x = 97.24
Answer: $97.24
Write a rule for the function represented in the table
Answer:
i think that it is y=5n
Step-by-step explanation:
What is the length of the altitude of the equilateral triangle below
Answer:
Step-by-step explanation:
Recall that an equilateral triangle has three equal interior angles, all 60°. Let b represent the length of the base. Draw a dashed line from the upper vertex to the base, perpendicularly. This dashed line represents the height or altitude of the triangle.
Now construct a triangle whose opposite side is this altitude, whose hypotenuse is b (and whose base is (1/2)b).
The altitude (opp) is then given by sin Ф = opp / hyp = opp / b. Solving this for the altitude (opp), we get b·sin 60°:
alt (opp) √3
------------- = ------
hyp 2
b·√3
so that 2 alt = b·√3, or alt = ------------
2
Thus, for any equilateral triangle of side length b, the height of the triangle is
√3
alt = height = b · ------
2
Please note: Your problem statement refers to "the equilateral triangle below." It's important that you share such illustrations, along with all instructions. In this case your question was general enough so that I could use the definitions of "sine," "equilateral," etc., to come up with a general answer.
Answer:
do u have a pic i can see
Step-by-step explanation:
So what am I supposed to be looking for?
Answer:
C. 2.5
Step-by-step explanation:
If the number is -2.5
Basically the opposite in a summary
Answer:
C
Step-by-step explanation:
The additive inverse is what you add to a number to get zero.
That is, the negative of a number
Here A is positioned at - 2.5
The additive inverse is 2.5 → C
Since - 2.5 + 2.5 = 0
Simplify ( 2 + sqrt-3 / 2) (2 - sqrt-3 / 2)
Answer:
[tex]2.5[/tex]
Step-by-step explanation:
The given radical expression is
[tex](2+\sqrt{-\frac{3}{2} }) (2-\sqrt{-\frac{3}{2} })[/tex]
Observe that, the given expression can be written as difference of two squares.
That is; [tex](x+y)(x-y)=x^2-y^2[/tex]
We apply this property to obtain:
[tex](2+\sqrt{-\frac{3}{2} }) (2-\sqrt{-\frac{3}{2} })=2^2-(\sqrt{-\frac{3}{2} })^2[/tex]
We now simplify to get:
[tex](2+\sqrt{-\frac{3}{2} }) (2-\sqrt{-\frac{3}{2} })=4-\frac{3}{2}[/tex]
This simplifies to:
[tex](2+\sqrt{-\frac{3}{2} }) (2-\sqrt{-\frac{3}{2} })=\frac{5}{2}=2.5[/tex]
John wants to deposit $1000 as a principle amount, with an interest of 4% compounded quarterly. Cayden wants to deposit $1000 as the principle amount, with an interest of 3% compounded monthly. Explain which method results in more money after 5 years. Show all work.
Answer:
John will get more money after 5 years.
Step-by-step explanation:
To calculate compound interest we use the formula
[tex]A=P(1+\frac{r}{n})^{nt}[/tex]
A = Amount
P = Principal
r = Rate of interest ( in decimal )
n = number of compounding period (quarterly = 4) (monthly = 12)
t = time in years
John wants to deposit $1000 with an interest of 4% compounded quarterly for 5 years.
[tex]A=1,000(1+\frac{0.04}{4})^{(4)(5)}[/tex]
[tex]A=1,000(1.01)^{20}[/tex]
A = 1000 ( 1.22019 )
A = $1220.19
John will get $220.19 as interest after 5 years.
Cayden wants to deposit $1,000 with an interest of 3% compounded monthly for 5 years.
[tex]A=1,000(1+\frac{0.03}{12})^{(12)(5)}[/tex]
[tex]A=1,000(1.0025)^{60}[/tex]
A = 1,000 ( 1.161617 )
A = 1161.62
Cayden will get $161.62 as interest after 5 years.
Therefore, John will get more money after 5 years.
A tank measure 30 centimeters by 30 centimeters by 50 centimeters. It is filled with water from a tap that flows at a rate of 6 liters per minute. How long would it take to fill 4/5 of the tank with water? Give your answer in minutes and seconds.
Answer:
6 minutes
Step-by-step explanation:
There are two ways you can simplify this problem:
1. change the dimensions to 3 dm × 3 dm × 5 dm, because 1 L = 1 dm³
2. Adjust the 5 dm dimension to 4/5 that value: 4 dm. Then you're filling a whole volume that is 3 dm × 3 dm × 4 dm = 36 dm³ = 36 L.
__
At the rate of 6 L/min, the tank will be filled to the desired level in ...
(36 L)/(6 L/min) = 6 min . . . . and 0 seconds
_____
A decimeter is 0.1 m = 10 cm, so 1 cubic decimeter is (10 cm)³ = 1000 cm³ = 1 liter. Using decimeters as the unit of measure in volume problems can make conversion to liters trivial.
what is the quotient of 7^2/2x+6 divided by 3x-5/x+3
[tex]\bf \cfrac{7^2}{2x+6}\div \cfrac{3x-5}{x+3}\implies \cfrac{7^2}{2x+6}\cdot \cfrac{x+3}{3x-5}\implies \cfrac{49}{2~~\begin{matrix} (x+3) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}\cdot \cfrac{\begin{matrix} x+3 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix} }{3x-5}\implies \cfrac{49}{2(3x-5)}[/tex]
simplify
[tex](x^{2} + 3x - 4) + (4^{2} - 5) - (7x + 3)[/tex]
X^2-4x+4 is the answer, to save you points next time, use an app called M8thw8y
First you want to drop the parenthesis. If there is a “+” sign, you do not have to change anything. If there is a “-“ sign, you have to distribute the negative in order to simplify, so imagine you are distributing -1 to 7x + 3 to make it -7x -3.
So, you now have x^2 + 3x - 4 + 16 -5 - 7x -3. (I evaluated the 4^2 to 16)
Now, what you want to do now is to combine like terms. Notice that there is only one x^2, so it is the same. There are two terms that have “x”. 3x and -7x react like normal numbers and they form -4x. The numbers who don’t have x on them you combine like terms.
Answer is x^2 - 4x - 12
Ivan is putting books in his bookcase. He has
already put 74 books in the bookcase but he has
225 books. How many more books does he have to
put in the bookcase?
Answer:
151
Step-by-step explanation:
because 225-74 =151
151 books
There are 225 books, and 74 have already been placed on the shelf. Subtract 225 minus 74 to find that Ivan needs to place 151 more books on the shelf.
what are regular and irregular numbers
Do you mean irrational?
The angles of a pentagon are x, x − 5
, x + 10
, 2x + 15and 2x + 30
. Find all the angles.
Answer:
65°, 70°, 80°, 155°, 170°
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
here n = 5 ( pentagon )
sum = 180° × 3 = 540°
Sum the given angles and equate to 540
x + x - 5 + x + 10 + 2x + 15 + 2x + 30 = 540
7x + 50 = 540 ( subtract 50 from both sides )
7x = 490 ( divide both sides by 7 )
x = 70
Hence angles are
x = 70°
x - 5 = 70 - 5 = 65°
x + 10 = 7 0 + 10 = 80°
2x + 15 = (2 × 70) + 15 = 140 + 15 = 155°
2x + 30 = (2 × 70) + 30 = 140 + 30 = 170°
LM has the endpoints L at –5 and M at 9. To find the point x so that x divides the directed line segment LM in a 2:3 ratio, use the formula x = (x2 – x1) + x1.
x = (9 – (–5)) + (–5)
x =
Answer:
3/5
Step-by-step explanation:
Bruh i gotchu Simple
A bag contains 10 pieces of flavored candy 4 lemon 3 strawberrys 2 grape and 1 cherry one piece of candy will be randomly picked from the bag what is the probability the candy picked is not grape flavored
Answer:
The probability that the candy picked is not grape flavored would be 4/5
Step-by-step explanation:
We are given that a bag contains 10 pieces of flavored candy. 4 lemon, 3 strawberry, 2 grape and 1 cherry. The probability that the candy picked is not grape flavored is calculated as;
(number of candy that are not grape flavored)/ ( total number of candy in the bag)
= (4+3+1)/(10)
= 8/10
=4/5
Therefore, the probability that the candy picked is not grape flavored would be 4/5
To find the probability that a randomly picked candy is not grape flavored, we will follow these steps:
1. Count the total number of pieces of candy in the bag. This is the sum of all the different flavors of candy:
- 4 lemon candies
- 3 strawberry candies
- 2 grape candies
- 1 cherry candy
The total number is 4 + 3 + 2 + 1 = 10 candies.
2. Count the number of candies that are not grape flavored. Since there are 2 grape candies, the number of candies not grape flavored is the total minus the grape candies:
10 (total candies) - 2 (grape candies) = 8 candies that are not grape flavored.
3. Calculate the probability of picking a non-grape flavored candy. Probability is the number of favorable outcomes divided by the total number of possible outcomes. In our case, the favorable outcomes are the instances where we pick a non-grape flavored candy, and the total possible outcomes are picking any candy from the bag:
Probability (not grape flavored) = Number of non-grape flavored candies / Total number of candies
Probability (not grape flavored) = 8 / 10
4. Simplify the fraction, if needed. In this case, the fraction 8/10 can be simplified to 4/5 by dividing both the numerator and denominator by the greatest common divisor, which is 2.
Therefore, the probability of picking a candy that is not grape flavored from the bag is 4/5, or 80% if expressed as a percentage.