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ohaa [14]
2 years ago
12

Anybody know how to do these? i need help pls contact me

Mathematics
2 answers:
Oksana_A [137]2 years ago
5 0
The awnser is 1!!!!! good luck!
Charra [1.4K]2 years ago
3 0

Answer:

your answer is 1 hope it's helps you

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The graph of a quadratic function f has zeros of -8 and 4 and a maximum at (-2,18). What is the value of a in the function’s equ
Harrizon [31]
<h3>Answer: C) -1/2</h3>

==================================

Work Shown:

We will use the general vertex form y = a(x-h)^2+k

(h,k) is the vertex, and the 'a' value stretches or compresses the graph vertically

(h,k) = (-2,18) since the highest point is at (-2,18)

Use either root -8 or 4 to plug into the equation as well. I'll use -8

The root -8 means the point (-8,0) is an x intercept.

----------------

Plug the values mentioned into the equation below. Then solve for 'a'.

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

y = a(x-(-2))^2+18 ... plug in (h,k) = (-2,18)

y = a(x+2)^2+18

0 = a(-8+2)^2+18 ... plug in (x,y) = (-8,0)

0 = a(-6)^2+18

0 = a*36+18

0 = 36a+18

36a+18 = 0

36a = -18 ... subtract 18 from both sides

a = -18/36 .... divide both sides by 36

a = (-1*18)/(2*18)

<h3>a = -1/2</h3>

---------------

Alternatively, you could use (x,y) = (4,0), instead of (x,y) = (-8,0), and you'll get the same 'a' value as well.  

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3 years ago
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What is the surface area of the cylinder with height 8 ft and radius 5 ft? Round your answer to the nearest thousandth.
m_a_m_a [10]
A≈408.41ft² < that is the answer
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Who else uses time4learning? am i the only one?
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Answer:

i think i used it before

Step-by-step explanation:

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The difference 3 1/2 minus 1 1/2 must be<br> between and
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Step-by-step explanation:

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3 years ago
Can anyone help me with this im having some difficulty
Whitepunk [10]

Answer:

option C

Step-by-step explanation:

(a+b)(a+b) = a^2 + 2ab + b^2

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