Lea and Marie are washing all the windows in their house. It would take Lea 80 minutes to wash the windows by herself, and it wo
uld take Marie 60 minutes to wash them by herself. Lea creates a table so she can find out how long it will take to wash the windows if they work together. What is the missing value in the table that represents the rate for Marie?
J j=agv where a is a constant of proportionality. j=1 when g=4 and v=5 1=a*4*5 1=20a a=1/20 a= 0.05 j=0.05gv When g=10 and v=9, j=0.05*10*9 j=0.5*9 j=4.5
For this you count rise over run aka how many up divided by how many over starting from 0. here it’s 7 up and 3.5 side, 7 divided by 3.5 is 2 and the line is going down so it’s negative 2 (D)