Question

1 The length of a rectangle is 10 inches, and the
width is represented by 3x. Which best
represents an equation and solution for x if the
area of the rectangle is 40 square inches?
A 10(3x) = 40; X = 4
B 30x = 40; x = 1;
C 3x = 40; x = 13
D 3x + 10 = 40; X = 10

Answer 1

Answer:

A

Step-by-step explanation:

To find the area of a rectangle, it is length times width (10*3x), and if it equals 40, you could just write that after the equation, and then find out that "x" would equal $\frac{4}{3}$

Answer 2

Answer:

30x = 40 ; x ≈ 1  

Step-by-step explanation:

$A^{}$ = $l^{}$ $w^{}$

$l^{}$ = 10 inch.

$w^{}$ = 3x

10(3x) = 40

30x = 40 ; x = $1\frac{1}{3}$ ≈ 1