Yanni’s scooter uses 7 gallons of gasoline to travel 85 kilometers. his dad does some mechanical work to the scooter such that it now uses 5 gallons of gasoline to travel 70 kilometers. if the price of gasoline is $2.85 per gallon, how much less, to the nearest cent per kilometer, will it cost to run the scooter after his dad does some mechanical work?

5*2.85/70 = 0.2035714285

7*2.85/85 = 0.2347058823

0.2035714285 - 0.2347058823 = -0.03113445372

It costs 3 cent per kilometer less after the work.

none.

step-by-step explanation:

m

1

=

5

m1=5

b

=

−

1

b=-1

find the slope and y-intercept of the second equation.

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m

2

=

0

m2=0

b

=

−

6

b=-6

compare the slopes

m

m of the two equations.

m

1

=

5

,

m

2

=

0

m1=5,m2=0

compare the two slopes in the decimal form. if the slopes are equal, then the lines are parallel. if the slopes are not equal, then the lines are not parallel.

m

1

=

5

,

m

2

=

0

m1=5,m2=0