Which expression is equivalent to 7 b + 4 b minus 1 b?

10b

Step-by-step explanation:

The letter b is a variable in this equation, and variables dont change when you add/subtract numbers with the same variable on them. So it turns into really 7+4-1. You would follow the rules of PEMDAS and just go left to right, so you add 7 and 4 to get 11, then subtract one to get ten. Then you have 10b.

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p