Unit 4 Practice Assessment

Karen complains x times a day. She then complains the same amount of times, x, for another 3 days. This is shown by the expression x+3x. Another way to write this expression would be

• 4x

• 3+x

• 4+x

Alex, a, ran 5 miles less than twice as much as Hank, h. Which expression models how much Alex ran?

• a=5h-2

• a=2h+5

• a=5h+2

• a=2h-5

Tommy, t, can type 28 words per minute. Samuel, s, can type 42 words per minute. Daniel, d, can type 36 words per minute. Which expression can be used for represent the total number of words all 3 of them can type in one minute?

• 106dst
• 28t + 42s + 36d
• 30,576dst
• 28d + 36s + 42t

James has a action figures. He then donates 20 of them to Goodwill. Which expression represents the number of action figures he has now?

• a + 20
• a - 20
• 20a
• a / 20

The amount of water in a reservoir has decreased 32.5% over the last year. If w represents the amount of water in the reservoir last year, which expression represents the amount of water currently in the reservoir?

• w + 0.325w
• w - 0.325w
• 32.5w
• 0.325w

Simplify this expression: 3f - 2g + 5g - f

• 2f + 3g
• 4f + 7g
• 4f + 3g
• 2f +7g

Simplify using Distributive Property 4(-2x + 8)

• -8x + 32
• 8x - 32
• -6x +12
• 6x -12

Which property is demonstrated below? (2x +3y) +z = 2x +(3y +z)

• Commutative
• Associative
• Distributive
• Additive

If you were to simplify 3y -4 + y using Commutative Property, what would you do first?

• nothing
• multiply 3 and 4
• add 3y and y
• move the terms around so that 3y and y are next to each other