What is - 30:2? I've been trying to figure this out ... do I do it on calculator, if so how?

6 less than the quotient of z divided by 3

A libary has 2000 books. there are 3 times as many non fiction books as fiction books. write and solve a system of equations to determine the number of nonfiction and fiction books.

A university needed to transport 90 fans to its football game from the stadium parking lot. The university rented a bunch of vans and put 10 fans in each van. Which equation, when solved, will tell the number of vans that the university rented?

The edge of a cube whose volume is 1728 cm 3

Current Law requires that wheelchair ramps have a height to length ratio of 1: 12 and old ramp has a height to length ratio of 2: 21 its height is 8 inches workers replace this ramp with a new one that has the same height how much longer must a new

The following table shows the time in various cities when it is 4:00 a. m. in New York. New York 4:00 a. m. San Juan 5:00 a. m. Buenos Aires 6:00 a. m. Dublin 9:00 a. m. Rome 10:00 a. m. Istanbul 11:00 a. m. Saint Petersburg 12:00 p. m.

Adventura needs to know animals weight in kilograms is 20 pounds is about 9 kilograms and a dog weighs 30 pounds use a ratio table to find the dogs weight in kilograms explain your reasoning

What angles does a triangle have

The denominator of a fraction is 4 more than its numerator. when 12 is added to this fraction, the resulting fraction's denominator is twice the denom

The ages of five friends are 20,31,28,31 and 25. How many of the friends are older than the average (arithmetic mean) age?