Answer:
1) 
2) 
3) 
4) 
5) 
6) 
Step-by-step explanation:
1) 





2) 





3) 




4) 




5) 




6) 




Answer:
a + 3
Step-by-step explanation:
Kim's age is always three more than Tom's age.
Answer:
$45.15
Step-by-step explanation:
When you are dealing with questions with percents in them—like this one—you have to turn the percent into a decimal. To make 7.5% into a decimal, you move the decimal point 2 spaces to the left. So, 7.5% is also 0.075.
Now, we have to use this formula for these types of questions:
x + x(y)= the price with tax (or markup)
So, we can substitute the variables.
42+42(0.075)=the retail price
42(0.075)=3.15
42+3.15=45.15
So, the retail price will be $45.15