Question

If d(3) = 4 and d(x) = 7x – k, what is k?

EMERGENCY!! HURRYYY

Answer 1

k=17

4= 7*3 -k

k=21-4

k= 17

Answer 2

17 = k

Explanation:

d(x) = 7x – k

Let d(3) = 4

4 = 7*3 -k

4 = 21 -k

Subtract 21 from each side

4 -21 = 21-k-21

-17 = -k

Multiply each side by -1

17 = k