Expressions Unit Test Review
Authored by Amy Rodak
Mathematics
7th Grade
CCSS covered
Used 5+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
Which of the following expressions is a trinomial?
2a + 5(4x)
3(4x) x 7
5(2x + 1)
9-3(5x)+13a
Answer explanation
Remember a trinomial has 3 terms. A term is a collection of variables and numbers (like 3x) put together using multiplication or dividion. We separate term using additiion and subtraction.
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
108
-108
36
-18
Answer explanation
Remember to use order of opearaitons on this
P: (4 - 7) = -3
E (-3)2 = 9
(remember a - times a - is a positive)
M: 3(9) = 27
A: 9 + 27 = 36
Tags
CCSS.6.EE.A.2C
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
If the expression 3x2 + 1 is evaluated for x = -4, which of the following would be the result?
-47
48
49
50
Answer explanation
This is tricky because you are substituting a negative number in for a base to an exponent. Remember if you are putting this in your calculator use ( ). Here is what is should look like and why....
3(-4)2 + 1
This should give you 16 (NOT -16) because -4 x -4 = 16.
3(16) + 1 = 49
Tags
CCSS.6.EE.A.2C
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
The expression 5(6x + 9) - (8x + 5) can be rewritten as which of the following?
-10x + 20
22x + 40
-10x + 70
22x + 50
Answer explanation
This is ticky becuase we are subtracting the two expressions so pease change to add the negative to help keep track of signs.
LOOK: Rewrite:
5(6x + 9) + -1(8x + 5)
30x + 45 + -8x + -5
22x + 40
Tags
CCSS.6.EE.A.3
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
What is the greatest common factor of 120 and 84?
12
18
3
6
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which of the following calculations is incorrect if you need to decrease 38 by 7%
38(1 - 0.7)
38 - 0.7(38)
(38 - 7) x 9.3
38(.93)
Answer explanation
Percent decrease can be represented by:
Taking 0.07 (38) then subtracting by 38. Looks like:
38 - 38(0.07)
Factor out:
38 (1 - 0.07)
Which is 38(0.93)
Tags
CCSS.6.RP.A.3C
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which of the following is Not a factor of the expression 6x + 30?
3
5x
5
6
Tags
CCSS.7.EE.A.1
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