Deborah spent 4 out
of 5 quarters. What
percent did she
spend?

80%   hope this helps

Step-by-step explanation:

20,40,60,80,100

80%

Step-by-step explanation:

well 5 out of 100 is 20 each so you do 20 4 times to get 80% (that didnt make a lot of sence)

5

Step-by-step explanation:

 Let the first session be y =20 + 30x equation 1

 Let the second session be y = 10 + 35x equation 2

equate the two functions

20 + 30x = 10 + 35x

y = 20 - 10 +30x - 35x

y = 10 -5x

Find the y intercept (that is where y = 0)

10-5x = 0

5x =10

x = 2

substitute x = 2 into equation 1 and 2

y =20 + 30(2) = 80

y = 10 + 35(2) =80

Notice that when you plot the graph for equ. 1 and equ. 2 , it intercepts at x =2 and y =80 (2, 80)