Algebra questions, help

1. Solve for c. ab - c = 9
A. -ab - 9
B. 9 + ab
C. ab - 9

2. Find two consecutive integers whose sum is 73.
Which of the following equations could be used to solve the problem?
A. 2x = 73
B. 2x + 1 = 73
C. 2x + 2 = 73
D.x2 + 1= 73

3. Jimmy has seven times as many dimes as nickels. Their value is $3.75. How many nickels does he have?
A. 35
B. 15
C. 5


Please help me, these questions i'm having trouble with.

1. C
2. B
3. C

1) C

2) C

3) C

1. C

2. B

I'm too lazy to answer 3. It's Saturday.