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3 years ago

Identify the value of x that makes each pair of ratios equivalent

1 answer:

8 0

I would be B. because from 4 to 20 is times 5 so you just divide 45 by 5 and you get 9.
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10. Emmilynn gets paid $975 each month. If she opens a savings account with a $100 check she

blondinia [14]

Answer:

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5 0

3 years ago

What is the y value of the vertex 4x^2+8x-8

Oksana_A [137]

Answer:

The y-value of the vertex is $-12$

Step-by-step explanation:

we know that

The equation of a vertical parabola into vertex form is equal to

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

where

(h,k) is the vertex of the parabola

In this problem we have

$f(x)=4x^{2}+8x-8$ -----> this a vertical parabola open upward

Convert to vertex form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$f(x)+8=4x^{2}+8x$

Factor the leading coefficient

$f(x)+8=4(x^{2}+2x)$

Complete the square. Remember to balance the equation by adding the same constants to each side

$f(x)+8+4=4(x^{2}+2x+1)$

$f(x)+12=4(x^{2}+2x+1)$

Rewrite as perfect squares

$f(x)+12=4(x+1)^{2}$

$f(x)=4(x+1)^{2}-12$

The vertex is the point $(-1,-12)$

The y-value of the vertex is $-12$

5 0

3 years ago

Read 2 more answers

$23.77 with a 10% tip

Triss [41]

Answer:

$26.15 total

Step-by-step explanation:

23.77(1.1)=26.147

5 0

2 years ago

Read 2 more answers

The table shows values for functions f(x) and g(x)

statuscvo [17]

Answer: When f(x)=g(x) , x equal to -2 or -1

Step-by-step explanation:

8 0

3 years ago

If prices increase at a monthly rate of 3.9%, by what percentage do they increase in a year?

kykrilka [37]

If it increases at 3.9% a month, then in a year it increases 46.8%.
This is because a year has 12 months and so take 3.9(12)=46.8

8 0

3 years ago