Solving Real-World Problems with Linear Equations

What is the first step in solving a real-world problem using linear equations?

• Using a calculator

• Assigning a variable to the unknown quantity

• Drawing a diagram

• Guessing the answer

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CCSS.3.OA.D.8

If Adrian's age is represented by x, how would you express her brother's age?

• x - 3

• x + 7

• x + 3

• x - 7

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CCSS.6.EE.A.2

CCSS.6.EE.B.6

What is the total sum of the ages of Adrian, her brother, and her sister?

• 30

• 40

• 50

• 60

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CCSS.3.NBT.A.2

CCSS.3.OA.D.8

In the rectangular room problem, if the width is represented by w, how is the length expressed?

• 2w

• w + 10

• w + 5

• w - 5

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CCSS.HSA.CED.A.2

CCSS.HSA.CED.A.4

CCSS.HSA.SSE.A.1

CCSS.HSA.SSE.B.3

What is the perimeter of the rectangular room?

• 100 feet

• 70 feet

• 80 feet

• 90 feet

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CCSS.3.MD.D.8

In the dog pens problem, how is the length of each pen expressed if the width is w?

• 2w + 5

• w + 5

• 2w + 3

• w + 3

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CCSS.3.MD.D.8

How many feet of fence are available for the dog pens?

• 160 feet

• 180 feet

• 200 feet

• 150 feet

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CCSS.3.MD.D.8

In the circle and square problem, what variable represents both the width of the square and the diameter of the circle?

• x

• w

• z

• y

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CCSS.HSA.CED.A.2

What is the total length of the gold wire used for the pendant?

• 8 inches

• 12 inches

• 10 inches

• 14 inches

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CCSS.3.MD.B.4

What is the approximate width of the square in the pendant problem?

• 1.2 inches

• 1.4 inches

• 1.6 inches

• 1.8 inches

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CCSS.3.MD.B.4