Work word problems

Liza can paint the kitchen in 5 hours. David can paint the same kitchen in 3 hours. If they work together, how long will it take to paint the kitchen?

• $1\ \frac{5}{8}\ hours$

• $1\ \frac{7}{8}\ hours$

• $\frac{1}{5}\ hours$

• $\frac{8}{15}\ hours$

It takes Jack ten hours to clean the yard. Cody can clean the yard in 7 hours. How long would it take if they worked together.

• 4 hours and 12 minutes

• 3 hours 12 minutes

• 4.12 hours

• 3.12 hours

Working together Sal and Joe paint the house in in 4.95 hours. Alone Sal can do it in 9 hours. How long would it take Joe to paint the house alone?

• 15 hours

• 8.5 hours

• 13.95 hours

• 11 hours

Tags

CCSS.HSA.CED.A.1

Harry can wash the gym floor in five hours. Ken can wash the gym floor in nine hours. If they work together how long will it take them

• 4.2 hours

• 1. 8 hours
• 3.21 hours

• 5.5 hours

Ryan can paint the wall in 10 hours. Anjie can paint the wall in 8 hours. How long will it take them together.

• 2 hours

• 1.25 hour

• 4.44 hours

• 6 hours

Working together Jane and John can dig a hole in 5.14 hours. Had she done it alone Jane could have dug the hole in 12 hours. How long would it take John to do it alone?

• 7 hours

• 8.99 hours

• 2.4 hours

• 6.86 hours

Peter can mow the lawn in 40 minutes and John can mow the lawn in 60 minutes. How long will it take for them to mow the lawn together?

• 48 minutes
• 50 minutes
• 24 minutes
• 12 minutes

Tags

CCSS.HSA.CED.A.1

Lucy and Quinn have started a car washing business. Lucy can wash a car in 3 hours. Together, Lucy and Quinn can wash a car in 1 hour. How long does it take Quinn to wash a car by herself? 

• It takes Quinn 4 hours. 
• It takes Quinn 2 hours. 
• It takes Quinn 1.5 hours. 
• I don't know. It's too cold to wash cars! *DON'T PICK THIS!*

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.2

CCSS.HSA.REI.B.3

CCSS.HSA.REI.C.6

Solve!

• x = 2
• x = 6
• x = 4
• x = 8

Tags

CCSS.7.EE.B.4A

What is the least common multiple of  x²-16 and x²+4x-32?

• (x + 4)(x – 4)(x + 8)
• (x-4)2 (x+8)
• (x + 4)(x – 4)
• (x - 4)(x-4)2(x + 8)

Tags

CCSS.HSA.APR.A.1

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3