A group of college students is volunteering for Help the Homeless during their spring break. They are putting the finishing touches on a house they built. Working alone, Irina can paint a certain room in 8 hours. Paulo can paint the same room in 7 hours. Write an equation that can be used to find how long it will take them working together to paint the room. How many hours will it take them to paint the room? If necessary, round your answer to the nearest hundredth.
(1 point)
Responses
Start Fraction 8 over x End Fraction + Start Fraction 7 over lower x End Fraction = 1; 15 hours
Image with alt text: Start Fraction 8 over x End Fraction + Image with alt text: Start Fraction 7 over lower x End Fraction = 1; 15 hours
one-eighth + Start Fraction 1 over 7 End Fraction = Start Fraction 1 over lower x End Fraction; 7.5 hours
Image with alt text: one-eighth + Image with alt text: Start Fraction 1 over 7 End Fraction = Image with alt text: Start Fraction 1 over lower x End Fraction ; 7.5 hours
Start Fraction lower x over 8 End Fraction + start fraction x over 7 end fraction = 1; 3.73 hours
Image with alt text: Start Fraction lower x over 8 End Fraction + Image with alt text: start fraction x over 7 end fraction = 1; 3.73 hours
Start Fraction lower x over 8 End Fraction+ start fraction x over 7 end fraction= 1; 1.87 hours
Image with alt text: Start Fraction lower x over 8 End Fraction + Image with alt text: start fraction x over 7 end fraction = 1; 1.87 hours
Therefore, it will take Irina and Paulo approximately 1.87 hours to paint the room together.