Answer:
the answer is D
Step-by-step explanation:
this is because the number is unknown so you have to put a variable
Answer:
4
Step-by-step explanation:
6/7(14/3)
(6(14))/21
4
Answer:

Step-by-step explanation:
Combine like terms (terms with the same exponent).

"Standard form" means to list terms so the exponents go from high to low (descending order).
Answer:
13.2/hour
Step-by-step explanation:
10% of 12 = 1.2
12+1.2=13.2