Solving and Justifying Solutions to Equations
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sally correctly solved an equation and got w = 15 as her answer. What type of solution does this equation have?
One Solution
No Solution
Infinite Solutions
Tags
CCSS.8.EE.C.7A
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Lisa correctly solved an equation and got 5 = 1 as her answer. What type of solution does this equation have?
One Solution
No Solution
Infinite Solutions
Tags
CCSS.8.EE.C.7A
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the Error
What error did the student make when solving the equation:
1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = 1/2
The student found an incorrect common denominator
The student did not multiply all terms by the common denominator
The student did not use opposite operations appropriately
The student did not correctly eliminate the variable from one side of the equation
4.
DRAG AND DROP QUESTION
1 min • 1 pt
Step 1) GIVEN
Step 2) (a)
Step 3) COMBINE LIKE TERMS
Step 4) SUBTRACTION PROPERTY
Step 5) (b)
Step 6) DIVISION PROPERTY
Step 7: SIMPLIFY
DISTRIBUTIVE PROPERTY
COMBINE LIKE TERMS
MULTIPLICATION PROPERTY
ADDITION PROPERTY
SUBTRACTION PROPERTY
DIVISION PROPERTY
Tags
CCSS.HSA.REI.A.1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
No Solution
Infinite Solutions
Tags
CCSS.8.EE.C.7A
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sarah incorrectly solved the equation -6(7n+7)=-294 as shown.
Step 1: -6(7n + 7) = -294
Step 2: -42n - 42 = -294
Step 3: -42n = -336
Step 4: n = 8
Between which two steps did Sarah make a mistake?
Step 1 and Step 2
Step 2 and Step 3
Step 3 and Step 4
Tags
CCSS.HSA.REI.A.1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Peter incorrectly solved the equation 86=-5(-6+2x)+3x as shown.
Step 1: 86 = -5(-6 + 2x) + 3x
Step 2: 86 = 30 + 10x + 3x
Step 3: 86 = 30 + 13x
Step 4: 56 = 13x
Step 5: 4.3 = x
Step 1 and Step 2
Step 2 and Step 3
Step 3 and Step 4
Step 4 and Step 5
Tags
CCSS.HSA.REI.A.1
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