Agroup of college students is volunteering for the homeless during their spring break. they are putting the finishing touches on a house they built. working alone, wade can paint a certain room in 7 hours. rhondda can paint the same room in 5 hours how long will it take them working together to paint the room? round your answer to the nearest hundredth if necessary

a.2.92hours

b.17.5hours

c.6hours

d.0.08hours

Option 'A' is correct.

Step-by-step explanation:

Since we have given that

Number of hours Wade take to paint a certain room = 7 hours

Number of hours Rhondda take to paint a certain room = 5 hours

Work done by Wade is given by

Work done by Rhondda take to paint a certain room =

Work done if they working together is given by

Number of hours if they working  together to paint the room is given by

Hence, option 'A' is correct.

Step-by-step explanation:

y³ (y² − 10) = -9y

Move everything to one side:

y³ (y² − 10) + 9y = 0

Factor out common term:

y (y² (y² − 10) + 9) = 0

Distribute:

y (y⁴ − 10 y² + 9) = 0

Factor:

y (y² − 1) (y² − 9) = 0

Solve:

y = 0, ±1, ±3

Since y > 0, the two possible values for y are 1 and 3.