Kevin drove 95 miles to meet his friend amanda at an

amusement park amanda drove 125 miles to get to the

same amusement park. given that kevin's truck uses one

gallon of gasoline every 15 miles and amanda's hybrid car

uses one gallon of gasoline every 40 miles, approximately

how many more gallons of gasoline did kevin's truck use

than amanda's car to reach the amusement park?

3.2 gallons more.

Step-by-step explanation:

Kevin used  95 / 15 = 6.333 gallons of gasoline.

Amanda used 125/40 =  3.125 gallons.

So Kevin used 6.333 - 3.125

= 3.2 gallons more.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

7.3

step-by-step explanation: