The miller's are comparing babysitting services for their two children.
the babysitter's block charges a rate of $15 an hour per child plus an initial fee of $25 per household.
super sitters charges a flat rate of $20 an hour per child.

it will take 2.5 hours for the hours of service to cost the same.

Step-by-step explanation:

Let L represent the hours of service for which both babysitting services would cost the same.

Let x represent the cost of L hours when using the Babysitter's Block.

Let y represent the cost of L hours when using the Super Sitters.

The Babysitter's Block charges a rate of $15 an hour per child plus an initial fee of $25 per household. This means that the cost of L hours for the two children would be

x = 25 + 30L - - - - - - - - - - - -1

Super Sitters charges a flat rate of $20 an hour per child. This means that the total cost for L hours for the two children would be

y = 40L

To determine the the hours of service for which both babysitting services would cost the same, we would equate x to y. It becomes

25 + 30L = 40L

25 = 40L - 30L = 10L

L = 25/10 = 2.5 hours

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation: