Simplify 21 a + (-18b) - 6a+11b

20% of the 6th graders are in the play. If 32 students are in the play, how many 6th graders are in the play?

A submarine sandwich 1.5feet long is cut into 0.25 foot pieces. how many pieces will there be?

Examples of unit price

How should you perform the snapping of the wrist when throwing a Frisbee?

luis spends 2 hours out everyday. He spends 45 minutes lifting weights. 42 minutes doing cardio, and the rest of the time he spends on his boxing training. What percentage of time does he spend boxing?

How many of the unknown flow rates and/or mole fractions must be specified before the others may be calculated?

At a gas station, Lora took 1/6 minute to fill 3/5 gallon of gas. At this rate, how many gallon of gas could Lora fill in 1 minute? use a mixed number to express your answer. 5/18 3 3/5 1 5/8 18/5

5 and three tenths - 2 and five tenths

What does 2*4+5-3=? Then divide the answer by Five.

A box of chocolates contains 5 milk chocolates and eight dark chocolates. You randomly pick a chocolate and eat it. Then you randomly pick another piece. What is the probability that both pieces are milk chocolate? Show your work: