Alg I: Module 9 Quiz

• (-2,5)

• (10,0)

• (13,10)

• (25,-14)

• (-7,2)

• (2,-7)

• (1,3)

• (3,1)

Jackie bought a bottle of water and a pair of shoes for $34.40. The total for her purchase before sales tax was $32. Her receipt shows an 8% sales tax on only the shoes. Which system of equations can be used to find the price Jackie paid for the bottle of water, w, and the pair of shoes, s?

A boat traveling with an ocean current travels at a speed of 32 mph. When traveling against the current, the boat travels at a speed of 20.8 mph. What is the speed of the boat and the ocean current?

• boat: 5.6 mph

  ocean current: 26.4 mph

• boat: 9.6 mph

  ocean current: 11.2 mph

• boat: 11.2 mph

  ocean current: 9.6 mph

• boat: 26.4 mph

  ocean current: 5.6 mph

There are a total of 85 maple and walnut trees on a piece of land. There are 13 more maple trees than walnut trees. How many maple and walnut trees are on this piece of land?

• 36 maple trees and 49 walnut trees

• 49 maple trees and 36 walnut trees

• 49 maple trees and 62 walnut trees

• 62 maple trees and 49 walnut trees

A scuba diver exploring the ocean at a depth of 12 feet below the surface of the water begins descending at a rate of 1 foot per second. At the same time, another scuba diver exploring the same area of the ocean at a depth of 8 feet below the surface of the ocean begins descending at a rate of 1.5 feet per second. How long will it take for the divers to reach the same depth?

• 4 seconds

• 20 seconds

• 8 seconds

• 40 seconds

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At a coffee shop, two sizes of coffee are sold. A medium coffee costs $3, and a large coffee costs $5. Write an equation that represents the relationship between the number of medium coffees sold, x, and the number of large coffees sold, y, in an hour where sales totaled $68.

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Which of the following systems of equations have one solution?

• A

• A, D

• B, D

• C