What is it called when two angles add to 90?

60 people are invited to a party there are 24 cups in a package and 18 napkins in the package what is the least number of packages of cups and napkins that will be bought if each party guest gets one cup and one napkin

There were 15 students on the school bus before Brad's stop. Twelve students, including Brad, got on the bus at his stop. The bus went to a high school and 6 students got off and 3 more got on.

20 1/5 subtract 17 2/3

Raul has 5 boxes of golf balls. Each box contains y golf balls. His father gives him another 8 golf balls. A. Find the total number of golf balls Raul has in terms of y B. If y=4, how many golf balls does Raul have altogether?

In a paper do you write 100 percent or one hundred percent

When looking at a rational function f of x equals the quantity x plus three times the quantity x minus two times the quantity x plus five all divided by the quantity x minus three times the quantity x plus two times the quantity x minus 5, Charles

recently 5/8 of the items sold at Debbies Sporting Good were baseball caps. at Sasha Sports 7/10 of the items sold were baseball caps which store sold a greater fraction of baseball caps?

You want to find the height of a tower used to transmit cellular phone calls. You stand 100 feet away from the tower and mesure the angle of elevation to be 40°. How high is the tower to the nearest foot

A helicopter leaves central airport and flies north at 180 mi/hr. Twenty minutes later a plane leaves the airport and follows the helicopter at 330mi/hr. How long does it take the plane to overtake the helicopter

A rectangular piece of paper with length 29 cm and width 12cm has two semicircles cut out of it. Find the area of the paper that remains.