Which equation represents a line perpendicular to the line shown on the graph? help please

a, y=5/x-8
b, y=-5/2x+6
c, y=2/5x-1
d, y=-2/5x+9

Find the value of 1715⋅211.though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. give the numerator followed by the denominator, separated by a comma.

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Define multiplicative inverse. give an example of a number and its multiplicative inverse.