David can unload a delivery truck in 20 min. Allie can unload the same delivery truck in 35 min. if they work together, how long will the unloading take?

A bag contains 3 blue and 2 green marbles. What is the probability of drawing a blue marble folowed by a green marble, without replacing the first marble?

Steve's doctor has advised him to take protein supplements. He bought two brands, Brand A and Brand B. The table gives the amount of calcium, iron, and vitamins (in milligrams per spoonful) in each of the two brands.

During her pre-college years, Elise won 30% of the swim races she entered. During college, Elise won 20% of the swim races she entered. We can conclude that, in high school and college combined, Elise won

Anita runs 5/8 mile everyday. How many miles does she run in 5 days?

The sequence is recursive. Find the value of the next term in the sequence. 5,8,11,14,17, ...

Line L1 has the equation 3x-30y=6 Express the equation of L1 in the slope-intercept form

In Mrs. Smith's enrichment class, 25% of the students are boys. There are 7 boys in the class. How many total students are in Mrs. Smith's enrichment class?

If a octagon is 25 centimeters long then the perimeter of the octagon is how many meters

In parallelogram ARMY, angle A equals (3x+10) ° and angle Y equals (2x+15.5) ° what is X?

A box contains 2 white, 3 red, and 4 black marbles. you choose two marbles and each are chosen at random. find the probability that both marbles are black