4. What is the numerical coefficient in the sequence 9n - 7?
A. 9n
B. 7
C.n
D. 9
5. Translate three times a number increased by six is fifteen.
A. 3 x n + 15 = 6
B. 3n + 6 = 15
C. 6n + 3 = 15
D. 3 + 6n = 15
6. If thrice a number is increased by 11, the result is 35. What is the number?
A. 7
B. 8
C.9
D. 10​