Question

using the substitution which number from the set [15,25,35,55]
makes the equation y plus 15 equals 40 true?

Answer 1

To make the equation y + 15 = 40 true, we need to substitute the value of y with a number from the set [15, 25, 35, 55] and check if it satisfies the equation.

Let's substitute each number and check:

1. For y = 15:
15 + 15 = 30 ≠ 40 (not true)

2. For y = 25:
25 + 15 = 40 (true)

3. For y = 35:
35 + 15 = 50 ≠ 40 (not true)

4. For y = 55:
55 + 15 = 70 ≠ 40 (not true)

The only number in the set [15, 25, 35, 55] that makes the equation true is y = 25.