Question

Dylan works out and burns 10 calories per minute swimming and 7 calories per minute biking. He wants to burn a minimum of 600 calories. Due to daylight limitations, the time Dylan spends swimming must be no less than twice the time he spends biking.

Answer 1

The solution in the attached figure

Explanation:

Let

x -----> the time Dylan spends swimming

y -----> the time Dylan spends biking

we know that

`10x+7y \geq 600` -----> inequality A

`x \geq 2y` -----> inequality B

Solve the system by graphing

The solution is the shaded area

see the attached figure