ANSWER:
The value of y in [tex]y=-4 x^{2}+8 x+8[/tex] is -39192 when x is 100.
SOLUTION:
Given the quadratic equation is [tex]y=-4 x^{2}+8 x+8[/tex] --- eqn (1)
And we need to predict y when x =100
Let’s use the substitution method to solve this problem.
To get the value of y, substitute the x value in the equation (1)
[tex]y=-4(100)^{2}+8 \times 100+8[/tex]
[tex]=-4 \times 10000+800+8[/tex]
= -40000 + 808
y = -39192
Hence the value of y is -39192 when x is 100.
