Find the value of f(-4) if f(x) = x2 + 7.

Just plug in -4 everywhere you see an x:
f(x) = 2x + 7
f(-4) = 2(-4) + 7
f(-4) = -8 + 7
f(-4) = -1

Your answer would be ahere is how: perimeter is how long all the sides are. in a rectangle, there are two sets of parallel sides. so, to find this, we would to the following.(15x2)+(4x2)30+838if you have questions ask! and mark me brainliest! i really wanna level up : 3