7.5 7th Grade Math Review

Two business owners make a purchase for supplies they need. Kristen runs a daycare center. She purchased 3 cases of toilet paper, 6 cases of assorted chips, and 5 cases of laundry soap. Each case of toilet paper cost $37.45, each case of assorted chips cost $24.38 and each case of laundry soap cost $58.61. Which is the best estimate of the total cost, in dollars, of the items?

• 450

• 500

• 570

• 600

Gavin is buying supplies for his dog grooming shop.  He buys 5 liters of shampoo, 15 pairs of scissors, 35 collars and 1 case of dog treats.  These supplies cost him $192.55 . Each liter of shampoo cost $4.99, each pair of scissors cost $6.50, and each collar cost $0.95.  What is the cost, in dollars, of the case of dog treats?

HINT: Type ONLY the numbers, NO MONEY SYMBOL!

Solve these two equations.

          5x + 6 = 67

          5(y + 6) = 67

Which statement about the solutions to these equations is true?

• x=13.2 and y=19.4

• x=14.6 and y=19.4

• x=13.2 and y=7.4

• x=14.6 and y=7.4

Jack and Diane each worked out for six days last week.

Jack did the following: 

• Weight training for a total of 180 minutes for the week.

• Worked out on the elliptical for an equal amount of time each of the six days.

• All together he did weight training and the elliptical for a total of 450 minutes. 

Diane did the following: 

• Weight training for 35 minutes each day.

• Worked out  on the elliptical for an equal amount of time each of the six days. 

• All together she did weight training and the elliptical for a total of 390 minutes. 

Determine how many minutes Jack worked out on the elliptical each day last week.

Jack and Diane each worked out for six days last week.

Jack did the following: 

• Weight training for a total of 180 minutes for the week.

• Worked out on the elliptical for an equal amount of time each of the six days.

• All together he did weight training and the elliptical for a total of 450 minutes. 

Diane did the following: 

• Weight training for 35 minutes each day.

• Worked out  on the elliptical for an equal amount of time each of the six days. 

• All together she did weight training and the elliptical for a total of 390 minutes. 

Determine how many minutes Diane worked out on the elliptical each day last week.