21 is 24% of what number? If necessary, round your answer to the nearest hundredth.

It takes 6 hours and 30 minutes for a train traveling from Washington D. C. to arrive in Boston, Massachusetts. If the two stations are 455 miles apart, write and solve an equation to find the average speed of the train in miles per hour.

a man bought x boxes of doughnuts for $3.49 each. He paid with a $50 bill and received the correct amount of change. If he received more then $10 but less then $20, which inequality represents yhe number of boxes of doughnuts he could have bought

Mr. Hill is building a walkway from the corner of his house out to his vegetable garden in the corner of the yard. The dimensions of the yard and the garden are shown.

A system of three linear equations in three variables is inconsistent. How many solutions to the system exist?

Nine members of the drama club are going to New York to see a broadway play as a group. Total cost for tickets, including a $15.00 handling fee, will be no more than $258.00. What is the maximum cost of each ticket?

On a test Matilda answered 12 out of the first 15 correctly. If this rate continues how many of the next 25 problems will she answer correctly?

Which expression shows the value of a $10,000 investment that has lost 1.2% if it's value for five years In a row

The bear population in RI has been increasing by 8% each year. In the year 2010 there were only 20 bears spotted in RI. Based on this info, a. create a function a (t) that represents the bear pop, t years since 2010 b. determine bear pop in 2020 c.

A ladder leaning against a house makes an angle of 30° with the ground. the foot of the ladder is 7 feet from the foot of the house. how long is the ladder?

Would you rather have 40 hours a week of video game time or 40% of your week?