Tomas bought 3 software apps and 2 e-books for a total of $21. The two e-books cost $12. If s represents the cost of each app, the total cost of all 5 items is represented by 3 s + 12 = 21. Which statement about verifying the solution for s is true?

The solution is given by s = 6 because it makes the value of 3 s + 12 equal to 21.

The solution is given by s = 3 because it makes the value of 3 s + 12 equal to 21.

The solution is given by s = 9 because it makes the value of 3 s + 12 equal to 21.

The solution is given by s = 12 because it makes the value of 3 s + 12 equal to 21.

Question

Mathematics

Lyla Atkins

6 March, 19:18

Tomas bought 3 software apps and 2 e-books for a total of $21. The two e-books cost $12. If s represents the cost of each app, the total cost of all 5 items is represented by 3 s + 12 = 21. Which statement about verifying the solution for s is true?

The solution is given by s = 6 because it makes the value of 3 s + 12 equal to 21.

The solution is given by s = 3 because it makes the value of 3 s + 12 equal to 21.

The solution is given by s = 9 because it makes the value of 3 s + 12 equal to 21.

The solution is given by s = 12 because it makes the value of 3 s + 12 equal to 21.

+5

Answers (2)

Know the Answer?

Terrence Allison · Answer 1

b. The solution is given by s = 3 because it makes the value of 3 s + 12 equal to 21.

Explanation:

I took the test and got it right.

Step 1: Substitute s for 3. You get 3 (3) + 12 = 21.

Step 2: 3 (3) + 12 = 21 is converted to 9 + 12 = 21.

Step 3: 9 + 12 equals 21.

Celia Schultz · Answer 2

The solution is given by s=9 because it makes the value of 3s+12 equal to 21.

Step-by-step explanation:

If you replace s with 9 you will get 21