
Evaluating Expressions with Unknown Variables

Interactive Video
•
Mathematics
•
6th - 9th Grade
•
Hard
+1
Standards-aligned

Amelia Wright
FREE Resource
Standards-aligned
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the initial expression given in the problem?
15a + 15b = 2
3x + 3y + 3z = 1
3a + 5b = 2
12x + 12y + 12z = 1
Tags
CCSS.7.EE.A.1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can the expression 12x + 12y + 12z be rewritten?
5 times (a + b)
3 times (x + y + z)
15 times (a + b)
12 times (x + y + z)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the value of x + y + z derived from the first equation?
1
3
4
1/3
Tags
CCSS.6.EE.A.2C
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final value of 12x + 12y + 12z?
4
1
12
3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the new expression introduced in the second problem?
3a + 5b = 2
3x + 3y + 3z = 1
12x + 12y + 12z = 1
15a + 15b = 2
Tags
CCSS.7.EE.A.1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What expression are we trying to find in the second problem?
15a + 15b
3x + 3y + 3z
3a + 5b
12x + 12y + 12z
Tags
CCSS.8.EE.C.8B
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why can't we solve for a + b in the second problem?
The equation is incorrect
The constants are too large
The variables are undefined
Not enough information is provided
Tags
CCSS.7.EE.A.1
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