Module 3 Topic 3 Quantitative Relationships Study Guide

The cost of an umbrella (u) is $20 less than the cost of a raincoat (r). Which equation could model this fact?

• u = r + 20

• u = r - 20

• u + r = 20

• u - 20 = r

Jaquan is buying boxes of paper. Which equation will help Jaquan determine the number of reams of paper he will get if he buys 8 boxes?

• R = 6 + N

• R + N = 6

• R = 6 - N

• R = 6N

Sophia is selling coupon books that cost $15 each. If c represents the number of coupon books she sells and t represents the total amount collected, which equation models the amount of money she could raise.

• t = 15c

• t = 15 + c

• c = 25t

• c = 25 - t

Mr. Snokes took home 18 math papers to grade. He graded m papers before dinner. How many papers did he have to grade after dinner?

• 18 + m = ?

• 18 - m = ?

• 18m = ?

• m - 18 = ?

Davius bought 3 dozen eggs. He then fried 5 eggs, Which equation represents the number of eggs (E) Davion has left? (Hint: A dozen is 12).

• E = 3 x 12 - 5

• E = 5 x 12 - 3

• E = 3 x 12 + 5

• E = 5 x 2 - 12

Susannah baked 25 brownies. She gave away b brownies Which equation shows the number of brownies she has left?

• 25 - b = ?

• 25 + b = ?

• b - 25 = ?

• 25b = ?

Which statement is correct?

• There are no independent quantities.

• The origin (0, 0) is the independent quantity and the time values are the dependent quantities.

• The distance values are the independent quantities and the time values are the dependent quantities.

• The time values are the independent quantities and the distance values are the dependent quantities.

Shelley charges $8 per hour to mow grass. She uses the equation T = 8x to determine the amount of money she made last week. What does x represent in the equation?

• The number of lawns mowed

• The number of hours she mowed grass

• The total money earned

• The amount she earns per hour

Jack earns $12.00 less than Nathan. If b is the amount that Nathan earned, how much did Jack earn?

• b + 12 = ?

• 12b = ?

• 12 - b = ?

• b - 12 = ?

Avalon sells coffee for $0.60 per cup. She uses the equation y = 0.6x to determine how much money she made last week. What does x represent in the equation?

• number of cups sold

• amount of coffee in each cup

• amount charged for each cup

• total amount of money earned