What is the area of a rectangle with a length of 21 feet and a width of 15 feet

315 ft

Step-by-step explanation: The length of a rectangle is length times width, so 21 (length) times 15(width) is 315 ft.

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )

14.29%

step-by-step explanation: