At dinner one night Sean paid a total of $54.32. The tax was 8%, and he left a 20% tip on the check and tax.

Which equation can be used to find the amount of the check BEFORE tax and tip?

A) x + 0.28x = 54.32
B) 54.32 - 0.8x - 0.20x = x
C) x + 0.08x + 0.20x = 54.32
D) .20(x + 0.08x) + (x + 0.08x) = 54.32

Valentino starts with a population of 1,500 amoebas that increases 35% in size every hour for a number of hours, h. the expression 1,500(1+0.35)h finds the number of amoebas after h hours. which statement about this expression is true? a. it is the initial population raised to the growth factor after h hours. b. it is the sum of the initial population and the percent increase. c. it is the sum of the initial population and the growth factor after h hours. d. it is the product of the initial population and the growth factor after h hours.

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

You put the following items into your rucksack. ham 600 g cheese 380 g tomatoes 270 g how much do all the ingredients weigh in total?