Jack and Jill went for a walk separately. Jack’s total distance in blocks, x, was thirty blocks fewer than twice Jill’s total distance in blocks, y. The difference between five times Jack’s total distance and twice Jill’s total distance is ten blocks. The following system can be used to model this relationship.

x= 2y -30

5x-2y=10

Step-by-step explanation:

substitute x= 2y-30 into the 2nd equation

5(2y-30)-2y = 10

10y-150-2y=10

10y -150-2y= 10

8y-150=10

  +150     +150

8y= 160 so y =20   substitute y=20 into x=2y-30 so 40-30=10 so x=10 & y=20

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers