Chris ran 2.5 laps in 81 seconds, what was his average time per lap

1) The solution x = 1/2 is a solution to which of the following equations? 5x = 20 4 = 15x -4x = 60 30 = 60x 2) Solve the following equation: |5x| = 20 -20, 20 -4, 4 4, 20 -4, 20

2x+3y=-2 4x+7y=-6 solve for the system of equations

Seth spends every Saturday mowing lawns in his neighborhood. Last month, he made $416. If he deposited 3/4 of the money into is college fund and kept the rest for himself, how much money does he have left to spend?

Check whether the function yequalsStartFraction cosine 2 x Over x EndFraction is a solution of x y prime plus yequalsnegative 2 sine 2 x with the initial condition y (StartFraction pi Over 4 EndFraction) equals0.

Solve for x: 80.375x^2 + 1505 = 6^x + 1505

It is known that x=7 is a root of the equation ax^2 + bx + 2 = 0, where a<0. Solve the inequality ax²4 + bx^2 + 2>0.

Which ordered pair is a solution of the equation? X+7y=17 Answer Choices A. Only (10,1) B. Only (-4,3) C. Both (10,1) and (-4,3)

A high school play cost an up front $30,000 to produce, plus an additional cost as of $1000 for each perfromance. Every sold out performance of the of thr play brings in $2500 of revenue to the school.

A teacher is interested in performing a hypothesis test to compare the mean math score of the girls and the mean math score of the boys. She randomly selects 10 girls from the class and then randomly selects 10 boys.

Otto spent 3/4 of the money he had saved on a new video game. If the video game cost $48, how much money did he have before he bought the game?