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2 years ago

A parabola opening up or down has vertex (0, -2) and passes through (8, -18). Write its

Mathematics

1 answer:

madreJ [45]2 years ago

5 0

Answer:

f(x) = -1/4(x - 0)^2 - 2

Step-by-step explanation:

vertex form:

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

1) put the vertex in the equation, ( (h, k) is the vertex)

f(x) = a(x - 0)^2 - 2

2) plug in the point (8, -18) to find the value of a

-18 = a(8 - 0)^2 - 2

-18 = a(64) - 2

-16 = a(64)

-16/64 = a

-1/4 = a

3) plug in the value of a into the equation

f(x) = -1/4(x - 0)^2 - 2

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Give two representations in polar coordinates for the rect- angular point (−3,−3√3)

Virty [35]

I think i saw the answer to this question on yahoo look for it there

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4 years ago

The same seven pieces shown on the top were used to make two different figures as shown (the pieces do not overlap anywhere).

mr_godi [17]

Answer:

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3 years ago

I NEED HELP ASAP PLEASE!!

Makovka662 [10]

Answer:

(2x-3) (2x+3)

zeros, x intercepts: -3/2, 3/2

Step-by-step explanation:

4x^2 -9

We know the difference of squares is a^2 -b^2

This factors into (a-b) (a+b)

Let 4x^2 =a^2

Taking the square root

2x =a

Let b^2 =9

Taking the square root

b= 3

(4x^2-9 ) = (2x-3) (2x+3)

To find the zeros, we set the equation equal to zero

(4x^2-9 ) = (2x-3) (2x+3) =0

Using the zero product property

2x-3 =0 and 2x+3 =0

2x-3+3 = 0+3 2x+3-3 = 0-3

2x=3 2x=-3

Divide by 2

2x/2 = 3/2 2x/2 = -3/2

x = 3/2 x = -3/2

These are the zeros of the equation (which are also the x intercepts)

8 0

4 years ago

Solve the whole problem i give brainliest please help me.

Anna11 [10]

Answer:

The inequality is 12.5v + 70 ≥ 215

and the amount of visits they can make is 12 visits

Step-by-step explanation:

if you take away (subtract) 70 from both sides, you'll get

12.5v ≥ 145

and when you divide both sides by 12.5, you'll get 11.6, or 12

3 0

3 years ago

Pedro bought a skateboard last week. The list price of the skateboard was $64.90. He has a 20% coupon. He has to pay 8.5%

Lapatulllka [165]

Take the original price and times it by .8 (you could times it by .2 and then subtract from the original price but multiplying it by .8 is much easier) 64.9x.8= 51.92 take your discounted price and multiply it by 1.085 to account for the sales tax (you multiply by 1.085 to account for the price of the item and the tax you could times it by .085 and then add it on to the price of the item but this way it shortens the amount of steps needed) 51.92x1.085= 56.3332
Round to the nearest cent
Answer=$56.33

3 0

3 years ago