Question

Connie needs to burn at least 500 calories at the gym today. She can burn 20 calories per minute on the treadmill (t) and 10 calories per minute on the elliptical trainer (e). Which inequality below can be used to find the possible combinations of time she could spend on each machine and still meet her goal of burning at least 500 calories?

20t - 10e 500

20t + 10e 500

20t - 10e 500

20t + 10e 500
can anyone help?

Answer 1

@stgreen

Answer 2

first of all you didn't write inequalities in correct syntax
she can spend 20 minutes on treadmill to lose 400 calories,and 10 minutes on elliptical trainer to lose 100 calories.....thus she can lose 500 calories in 30 minutes (20 on t + 10 on e)
so fourth option