Question

The recommended heart rate for exercise, in beats per minute, depends on a person's age and can be represented by the expression 0.7 (220 - a). Which of the following is an equivalent expression? A. 154 - 0.7a B.154 - a C. 220 - 0.7a D. 0.7a - 154

Answer 1

The expression is:

0.7(220 - a)

Applying distributive property:

0.7*220 - 0.7a

154 - 0.7a (option A)