85 = 10x+15
70 = 10x
x = 7
180-85 = 95 = z
75% you add them together then devide by 2
So we can call first number "n"
Then all five integers would be n, n+1, n+2, n+3, n+4
So sum of them would be 5n + 10 = 100
Now you can solve for n:
5n + 10 = 100
5n = 90
n = 18
Verify: 18 + 19 + 20 + 21 + 22 = 100. All good.
So answer is 18
F(3) is 3 since the equation of the line is f(x)=3
3/2^2 or 0.75 because you have to take the middle value (3), divide it in half, then square it. That would be 0.75.
