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son4ous [18]
3 years ago
6

what is f(x) = 2x2 28x – 5 written in vertex form? f(x) = 2(x 7)2 – 19 f(x) = 2(x 7)2 – 103 f(x) = 2(x 14)2 – 14 f(x) = 2(x 14)2

– 98
Mathematics
2 answers:
juin [17]3 years ago
7 0

Answer:

f(x)=2(x+7)^2-103

Step-by-step explanation:

f(x) = 2x^2+28x - 5

To find out vertex apply the formula x=-b/2a

The value of a=2 and b=28

x=\frac{-b}{2a} =\frac{-28}{4} =-7

Now plug in x=-7 in f(x) equation and find out f(-7)

f(-7) = 2(-7)^2+28(-7)- 5=-103

Vertex is (-7,-103)

Now use vertex formula

f(x)=a(x-h)^2+k

a=2, h=-7, k=-103

Plug in all the values in the vertex form equation

f(x)=2(x+7)^2-103

polet [3.4K]3 years ago
4 0
Hello,
++++++++++++++++++++++
Answer B
++++++++++++++++++++++

2x²+28x-5=2(x²+2*7x+49)-5-2*48
=2(x+7)²-103

++++++++++++++++++++++++++++++
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A triangle has two angles that each measure 50° What is the measure of the third angle?
professor190 [17]

Answer:

80 degrees

Step-by-step explanation:

3 0
3 years ago
A family buys a studio apartment for $180.00 They pay a down payment of $54.00, Their down payment is what percent of the purcha
Volgvan

Answer:

Part A: 30%

Part B: 45000%

Step-by-step explanation:

To get your answer, you have to divide whatever number the down payment is by the number the family is supposed to pay for the studio apartment.

Part A: You need to divide $54.00 by $180.00, when you do that, you get the answer 0.3. You convert it to percentage by doing 0.3 multiplied by 100 which give you 30. Put a percent behind it and you have 30% as your final answer.

Part B: You need to divide 81,000 by 180 which gives you 450. Then you then have to do 450 multiplied by 100 which gives you 45,000. You then add the percentage behind and you have 45000% as your final answer.

3 0
2 years ago
Read 2 more answers
In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points.
bagirrra123 [75]
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5 0
3 years ago
PLEASE PLEASE I SUCK AT MATH AND ITS ALL DUE FRIDAY PLEASE 10 piont !!! Select all the correct systems of equations.
alekssr [168]

Answer:

2x + y = 17

-6x = 3y - 51

Step-by-step explanation:

You get an infinite number of solutions when two equations are really just the same. This means you can convert one into the other simply by multiplying one to get the other.

In the above answer, if you multiply the above by -3 you get:

-6x -3y = -51

which is of course -6x = 3y - 51

So that is an example of a pair that has infinite solutions.

To find all of them, you'd carefully have to compare each 2 and see if there is a multiplier to convert one into the other. You can do that!

4 0
3 years ago
Rita makes and sells necklaces. The materials to make each necklace cost $2.75. Last week she made 8 necklaces and wants to make
Tresset [83]

Answer:

The error she made was that she was adding x and 2.75. She should subtract 2.75 from x.

Another mistake that she made was that she sold each for $7 assuming that she would make a profit of 78, but she should see each necklace for $12.5 so that she could make a profit of $78.

Step-by-step explanation:

The error she made was that she was adding x and 2.75.

She should write the equation as 8 (x - 2.75) = 78; as she spends $2.75 to make a necklace.

By using the correct equation: 8 (x - 2.75) = 78

=> 8x - 22 = 78

=> 8x = 78 + 22

=> 8x = 100

=> x = 100/8

=> x = 12.5

Another mistake that she made was that she sold each for $7 assuming that she would make a profit of 78, but she should see each necklace for $12.5 so that she could make a profit of $78.

Hope this helps you.

3 0
3 years ago
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