2x+6y=21 and -2x+3y=24 using the elimination method and write as an ordered pair

(-0.5,7.66)

Step-by-step explanation:

2x+6y=21

-2x+3y=24

so 3y=24+2x

reduce

y=(24+2x)/3

substitute for y

2x+6(24+2x/3)=21

2x+(72+12x)/3=21

2x+24+4x=21

6x=-3

x=-0.5

y=(24+-1)/3=7.66

Assuming that the landscaping business is open for 12 hours, opens at 8AM and closes at 8PM. There are three friends, to be fair, they will divide the total number of hours. 12 hours divided by 3 is 4 hours for each friend. Therefore the minimum hours that one friend should spend for the landscaping business is at least 4 hours.