Three of these pairs of quantities are related by direct variation. which pair is not? a. x = hours traveled at 60 miles per hour, and y = total distance traveled b. x = length of a rectangular table, in inches, and y = length of the table, in centimeters c. x = number of $1-off coupons used, and y = amount saved d. x = time it takes to travel 60 miles, and y = speed traveled

x = time it takes to travel 60 miles, and y = speed traveled

Step-by-step explanation:

3, 12, 48, 384, 1536, 6144, 24576, 98304

step-by-step explanation:

just keep timing it by 4.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4