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

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.7.NS.A.3

Solve!

• x = 2
• x = 6
• x = 4
• x = 8

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.3

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