Need a bit of help with this. :< I was thinking that the 90 would be divided by 2 so it'd be 45. I'm not so sure however.

a - base

b - exponent

so,

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

using pemdas, (order of operations) you'll see the answer is 24.