Using substitution which number from the set { 15, 25, 35, 55, makes the equation y 15 = 40 true
To determine which number from the set { 15, 25, 35, 55 } makes the equation y * 15 = 40 true, we can substitute each number into the equation and see if it satisfies the equation.
For the first number, 15:
15 * 15 = 225, which is not equal to 40.
For the second number, 25:
25 * 15 = 375, which is not equal to 40.
For the third number, 35:
35 * 15 = 525, which is not equal to 40.
For the fourth number, 55:
55 * 15 = 825, which is not equal to 40.
Based on this, none of the numbers from the set { 15, 25, 35, 55 } makes the equation y * 15 = 40 true.