Alg1 Keystone Review

The letters m and n represent constants. Solve mx + n = 36 for x.

• x = (36-n)/m

• x = (n+36)/m

• x = (n-36)/m

A 5-foot-tall person casts a shadow that is 7 feet long. At the same time, a flagpole casts a shadow that is 56 feet long. What is the height of the flagpole?

• 35 ft

• 40 ft

• 45 ft

Solve |8x + 4| - 3 = 21

• x = 2 or x = -3.5

• x = 3 or x = -2.5

• x = 2.5 or x = -4

Write “a number b minus 4.5 is less than 3” as an inequality.

• b - 4.5 < 3

• b - 4.5 > 3

• b + 4.5 < 3

Find the domain and range of the function represented by the graph.

• Domain: [-4, 4], Range [-4,4]

• Domain: [-2, 4], Range [-4,4]

• Domain: [-2, 2], Range [-4,2]

Evaluate f(x) = 7x + 6 when x = 8.

• 54

• 62

• 70

Write an equation in slope intercept form of the line that passes through (2, 5) and (4, 9).

• y = 2x + 1

• y = -2x + 1

• y = 2x - 1

Write an equation of a line parallel to y = 2x - 5 that passes through the point (2, -1).

• y + 1 = 2(x - 2)

• y - 1 = -2(x - 2)

• y + 1 = -2(x - 2)

You buy 4 protein bars and 3 energy drinks for $18. Your friend buys 3 protein bars and 5 energy drinks for $21. What is the cost of each protein bar? of each energy drink?

• Protein bar: $2, Energy drink: $3

• Protein bar: $3, Energy drink: $3

• Protein bar: $3, Energy drink: $2

Determine the number of solutions of the system 3x + 2y = 8 and 3x + 2y = 12.

• Infinitely many solutions

• One Solution

• No Solution