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pishuonlain [190]
2 years ago
9

ammy the trainer has two solo workout plans that she offers her clients: Plan A and Plan B. Each client does either one or the o

ther (not both). On Monday there were 5 clients who did Plan A and 3 who did Plan B. On Tuesday there were 7 clients who did Plan A and 9 who did Plan B. Tammy trained her Monday clients for a total of 6 hours and her Tuesday clients for a total of 12 hours. How long does each of the workout plans last
Mathematics
1 answer:
kotykmax [81]2 years ago
6 0

Using a system of equations, it is found that both workout plans last 45 minutes.

For the system, we have that:

  • x is the length of a Plan A workout.
  • y is the length of a Plan B workout.

On Monday there were <u>5 clients who did Plan A and 3 who did Plan B</u>, for a total of 6 hours, hence:

5x + 3y = 6

On Tuesday there were <u>7 clients who did Plan A and 9 who did Plan B</u>, for a total of 12 hours, hence:

7x + 9y = 12

The system is:

5x + 3y = 6

7x + 9y = 12

Multiplying the <u>first equation by -3:</u>

-15x - 9y = -18

7x + 9y = 12

Adding them:

-8x = -6

8x = 6

x = \frac{3}{4}

In minutes, x = 45 minutes.

Then:

9y = 12 - 7x

9y = 12 - 7(0.75)

y = \frac{12 - 7(0.75)}{9}

y = 0.75

Also 45 minutes.

A similar problem, also solved using a system of equations, is given at brainly.com/question/14183076

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