At a party, everyone shook hands with everyone else. There were 66 handshakes. How many people were at the party? Explain.

In ΔQRS, the measure of ∠S=90°, the measure of ∠Q=29°, and RS = 83 feet. Find the length of SQ to the nearest tenth of a foot.

20,000 pounds equals how many English tons? A. 2,000 tons B. 10,000 tons C. 1 ton D. 10 tons

Mr. hershman has purchased a farm that is in the shape of a rectangle. the dimensions of the piece of land are 1.3 km by 3.15 km. how many square kilometers did he buy, and how many hectares did he purchase

What sales tax, at the rate of 5% must you pay on the purchase of a computer hard drive that cost $229?

The intensity, or loudness, of a sound can be measured in decibels (dB), according to the equation I (dB) = 10log[1/10], where I is the intensity of a given sound and I0 is the threshold of a hearing intensity.

A recipe for brownies calls for 4 eggs and 1 1/2 cups of flour. If the recipe makes 15 brownies, how many cups of flour will be needed to make 60 brownies?

A rectangular table measures 48 inches wide and 60 inches long. a tablecloth covers the table and hangs over the edge by 10 inches on each side. what is the area of the tablecloth measured in square inches

Missing lenght on the right side. solve for c. 8", 6" = c

What is the difference Of these mixed numbers 7 4/6 - 4 1/6

At the end of February there are 692 houses in our town. Some new house are built in March. At the end of March there are 967 houses. How many houses are built in March?