to find the area of a rectangle is LxW=A
plug in the given numbers you have
L = 7
W = x-8
A = 42
7 * x-8 = 42
7x-56= 42
solve for X
Answer:
it's B.
Step-by-step explanation:
(F-g) (X)
= f(x) - g(x)
(2x² + 2 )-(x²-1) =
3x²+3
$7.23
(2 x 2.49) + (3 x .75) = 4.98 + 2.25 = $7.23
x=4
6(8) = 48
