Question

Ava's age is 5 years less than 4 times Amy's age. If Amy's age is x years, which expression best shows Ava's age?

x
x − 1
4x − 5
5x − 4

Answer 1

The best expression would be 4x-5 since x represents Amy's age multiplied by 4. Then, subtract 5 to get Ava's age.

Answer 2

Hi!

The correct answer is 4x-5.

Explanation:

1. X is the years of Amy.
2. If you want to multiply by four the years of Amy, then you have 4X.
3. If you want to substract five years at four the years of Amy, then you have 4X - 5.

Example:

Amy's age 20, so X = 20.

Ava's age is Y.

• Y = 4X - 5
• Y = 4*20 - 5 = 75.