Start with

Simplify the left hand side by summing like terms (the one involving z):

Subtract 5z from both sides:

Subtract 7 from both sides

Divide both sides by 11:

a. How many quarts did they make is 25 quarts of lemonade
b. How much money will they make if they sell it all is $62.50
a. Calculation to determine How many quarts did they make.
Given: 1 gallon =5 quarts
Hence:
5 gallons of lemonade=5×5 quarts of lemonade
5 gallons of lemonade=25 quarts of lemonade
b. Calculation to determine how much money will they make if they sell it all
Given: 1 quarts=$2.50
Hence:
25 quarts=25 ×$2.50
25 quarts=$62.50
Inconclusion:
a. How many quarts did they make is 25 quarts of lemonade
b. How much money will they make if they sell it all is $62.50
Learn more here:
brainly.com/question/13442515
Answer: the answer is 8.8
Step-by-step explanation: multiply 2.2 by 4
2.2 X 4