5/6 divided by 1/2 simplified

Rachel is a stunt driver, and she's escaping from a building that is about to explode! The variable d dd models Rachel's distance from her exit (in meters) t tt seconds after the cameras began recording the stunt. D=38t+220 What is Rachel's speed?

Jeff and jill are collecting coats for kids. They hope to collect 20 coats per day to reach their goal. They have already collected 100 coats.

What is the factores form of 4x^2+23x-72

There are 765 marbles in a in a box. there are twice as many blue marbles as green marbles. there are 3 times as many red marbles as blue marbles, how many red marbles in the box

What percent of the June budget was for Tim's Chevron and car (to the nearest tenth) ?

Megan has 30 brownies and 42 cupcakes to package. She wants to put the same numbers of brownies and cupcakes in each box. What is the greatest number of boxes she can make? How many cupcakes and how many brownies will each box contain?

Making h the subject of the formula t=gh:10

The volume of construction work was increased by 60% but the productivity of labor increased by only 25%. By what percent must the number of workers be increased?

Simplify the expression (9 + 21) (9 - 21).

What is area in math and for what do you use area for?