Lesson 2-2 Quiz

Naomi and Claire are painting a mural. Naomi paints 2 square feet per hour and has already painted 16.5 square feet.

Claire paints 4 square feet per hour and has already painted 7.5 square feet.

How many more hours will it take for Naomi and Claire to paint an equal total number of square feet

• 7 hours

• 4.5 hours

• 2.5 hours

• 6 hours

Tags

CCSS.8.EE.C.7B

Moira solved a problem on the board. In what step did Maria make her mistake?

12x + 10 = 54 – 10x

Step 1: 12x + 10 – 10 = 54 – 10x – 10

Step 2: 12x = 44 – 10x

Step 3: 12x – 10x = 44 – 10x + 10x

Step 4: 2x = 44

x = 22

• Step 1

• Step 2

• Step 3

• Step 4

Tags

CCSS.HSA.REI.A.1

75 – 3.5y – 4y = 4y + 6

• 6

• 0.0944882

• -2

• -6

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

24 + 0.44x = 19 + 1.69x

• x = 5.4

• x = 5

• x = 0.44

• x = 4

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

A red candle is 8 inches tall and burns at a rate of 7/10 inch per hour. A blue candle is 6 inches tall and burns at a rate of 1/5 inch per hour.

After how many hours will both candles be the same height?

• -4 hours

• 2.5 hours

• 3 hours

• 4 hours

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

CCSS.6.RP.A.3