Question

Which equation is true when k = -15? 3k - 11 = -34 -53 + 4k = 7 k3+ 17 = 12 k5 + 2.5 = 0.5

Answer 1

To find the true equation when k = -15, we substitute -15 in each equation and check if it holds true. The equation 3k - 11 = -34 is true when k = -15.

Step-by-step explanation:

To find which equation is true when k = -15, we need to substitute -15 in each equation and check if it holds true. Let's go through each equation:

1. 3k - 11 = -34: Substituting k = -15, we get 3(-15) - 11 = -34, which is true.
2. -53 + 4k = 7: Substituting k = -15, we get -53 + 4(-15) = 7, which is false.
3. k³ + 17 = 12: Substituting k = -15, we get (-15)³ + 17 = 12, which is false.
4. k⁵ + 2.5 = 0.5: Substituting k = -15, we get (-15)⁵ + 2.5 = 0.5, which is false.

Therefore, the first equation, 3k - 11 = -34, is the true equation when k = -15.