4 friends are going to sit together in a roller coaster car that has 4 seats. In how many different arrangements can they sit?

What is |x|+|y|, if x=5 and y=-7 A. 2 B. 12 C. - 2 D. - 12

When you work this problem, you get t = 3. Your teacher requires your answer in a complete sentence. What is your answer?

Round each number to the nearest hundred. 18,366

Combine the radicals 5√27 - 17√3

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 200 engines and the mean pressure was 5.4 lbs/square inch. Assume the standard deviation is known to be 0.8.

6. Solve the equation. Show your work. Check your answer. 3x - 7 = 5x + 19

Allie worked for 1/2 hour on Saturday and 2/3 hour on Sunday. Write the pair as a pair of fractions using common denominators. Explain your reasoning.

How to factor 4x^2+4x+1 completely?

Which expression is equal to the number of grams (g) in 2.43 kilograms (kg) ?

George wrote the number 27,026 on his paper. write a number that has a digit 7 with a value that is 10 time the value of the digit 7 in George's number