Answer:
23
Step-by-step explanation: i took it
The equation becomes y =-0.7x²+5.4x+6 if the person who is 6 feet tall throws a ball into the air option first is correct.
<h3>What is a quadratic equation ?</h3>
Any equation of the form
Where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.
The standard form of a quadratic equation:

Plug x = 0 and y = 6
6 = c ...(1)
Plug x = 1, and y = 10.7
10.7 = a + b + c ...(2)
Plug x = 2 and y = 14
14 = 4a + 2b + c ...(3)
After solving equation (1), (2) and (3) we get:
a = -0.7
b = 5.4
c = 6

Thus, the equation becomes y =-0.7x²+5.4x+6 if the person who is 6 feet tall throws a ball into the air option first is correct.
Learn more about quadratic equations here:
brainly.com/question/2263981
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F(x) = 1/2 * 2 - 4x
Just plug in 8 for 'x':
f(x) = 1/2 * 2 - 4(8)
Multiply:
f(x) = 1 - 4(8)
Multiply:
f(x) = 1 - 32
Subtract:
f(x) = -31
If there is 20 pencils there will be 5 erasers 20:5
Answer: A=20.8, B=20.5, C=10, D=2, E=12.6
Explanation: It takes time, but all you have to do it make an equation adding all the sides together, which equals 85.9. Then find “a” and plug that back in to each side. (I’m pretty sure this is right, but sorry if I’m wrong)