Which phrase describes an unknown or changeable quantity?

A. 2 times the number of pages in the book

B. 60 seconds multiplied by 5

C. 3 dollars and 76 cents

D. 15 years of schooling

17x - 2 (8x - 3) = 0

Sam spent 5/6 of an hour at the dentist's office. He spent 1/10 of the time in the waiting room. How much time did he spend at the dentist's office other than in the waiting room? 1/12 of an hour 3/25 of an hour 3/4 of an hour 11/12 of an hour

What is the equation and solution for. D=12 for 4d-24-12=0

James is following this recipe to make flapjacks. James uses 450 g of sugar. How many flapjacks is James making? Recipe: Makes 8 flapjacks 125 ml syrup 90 g sugar 180 g oats 125 g margarine 30 g sultanas

Write a word problem using 9 And 10 as factors. Write an equation to solve your problem.

Mr. Li has a bag of Skittles. There are 5 blue Skittles, 3 red Skittles, and 12 yellow Skittles. What is the probability of pulling out a blue Skittle? Express your answer as a simplified fraction. BONUS: What is your answer as a percent?

Sarah and Emmaree put on just dance. After school. When they started, it was 4:45pm and they danced until 5:30pm how many degrees does the minute hand turn by the time they stop dancing?

A gigameter is 1.0*10^16 kilometers. How many square kilometers are in 5 square gigameters? Write your answer in scientific notation.

X ^3 + 6x^2 + 12x+8 : (x+2)

40% of the 35 male guests wear glasses