Answer:
A) 
is the expression to represent total amount of money she earns babysitting for Smith family.
B) 
she will earn for Smith family for 7 hours
C) It would take 
for Margie to make 
when babysitting for the Smith family
Step-by-step explanation:
Given.
Mr. and Mrs. Smith pay Margie 
an hour to babysit their son, Shea.
Mr. and Mrs. Jones pay Margie $8 an hour to babysit their children, Sarah, Susan, and Dawn.
Let x be number of hours.
Solving for Part A.
Amount of Money earn from Smith family = Pay per hour 
Number of hours =
Solving for Part B.
x=7
Margie earns from smith family for 7 hours = 
Solving for part C.
Margie earned = 
To find number of hours
No of hour Margie has done babysitting for Smith family 
Answer:
$7.50
Step-by-step explanation:
First we find what is the value at which the eccentric collector offers to buy the quarters for. We know the value at which they will buy the quarter for is 600% of the face value - which is $0.25.
Now we do some math and find the value at which the person will buy the quarter for is $1.50.
Now we multiply the value by 50 since Larry would be giving 50 quarters.
$1.50*50 = 7.50
So, Larry will receive $7.50 for selling his 50 quarters to the eccentric collector.
