Their intersection is 7 because is you look at the coordinates of both A and B they have 7 in common
Base x Height would be the formula of a rectangular prisim
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f(x) = -2x
-2x = 0
x = 0/-2
x = 0
Now putting 0 as x in g(x)
g(x) = 8x^2 - 5x + 7
g(0) = 8(0)^2-5(0)+7
= 0 - 0 + 7
= 7
Answered by Gauthmath must click thanks and mark brainliest