Dan used a total of 2 1/6 of gas while driving his car, each hour he was driving, he used 7/10 gallons of gas. What was the total number of hours he was driving ?

by definition, an arc subtended by a central angle of some given measure has the same measure. so .

the answer is b

answer: -10

step-by-step explanation:

s(t) = 1 - 10t

s(x) = 1 - 10x

s(x + h) = 1 - 10(x + h)

            = 1 - 10x - 10h

s(x + h) - s(x) = 1 - 10x - 10h - (1 - 10x)

                      = 1 - 10x - 10h - 1 + 10x

                      = -10h

= -10