Question

There are twelve inches in one foot, creating the equation y = 12x. If a door

frame is 6.5 feet tall, how many inches tall is it?

Answer 1

78 inches.

Explanation:

By definition, a foot is equal to 12 inches. That is modeled by the equation you wrote, y = 12x, where x is the amount of feet.

Substitute 6.5 for x. y = 12*6.5 = 78 inches.

I hope this helps!