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3. a-9b-4

4. -6p+19

Step-by-step explanation:

you have to combine like terms.

#3's answer is C

#4's answer is B

Step-by-step explanation for #3:

1. Combine like terms: 2a - a - 9b + 3 - 7

2. Solve: a - 9b - 4; answer C

Step-by-step explanation for #4:

1. Distribute 2 to p + 3: 2p + 6

2. Combine like terms: 2p - 8p + 6 + 13

3. Solve: -6p + 19; answer B

s

step-by-step explanation:

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743