Kendall is planning to buy a laptop for 1,200 each month she doubles the amount she saved the previous month if she saved 20 dollar the month in how many month will she have enough money to buy a laptop

She will have enough money in 60 months...

Step-by-step explanation:

1 20 x 2= 40

2  40 x 2 = 80

3  80 x 2 = 160

4 160 x 2 = 320

5 320 x 2 = 640

6 640 x 2 = 1280

So the answer is 6 months.  

sorry, i can't understand your question. will later if you describe more clearly!

: )

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18