Shelly is going shopping at the mall to buy 3 pairs of shoes. she has a coupon for $2 off per pair of shoes after buying the first pair at full price. shelly is willing to spend $80 to $167 not including tax. if the shoes she purchases are all the same price, what is the least and most amount she can spend per pair?

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.