What is the volume if the density of an object is 3.0g/mL and the mass is 15.0g?

1/3x+y=9, - 2x+2y = - 6 ... what is x and y, using the substitution method?

401 people attended a high school basketball game. Seven buses were filled for the trip and 30 people traveled in their own cars. How many fans were on each bus?

Lorna and Robin work as consultants and get paid per project. Lorna is paid a project fee of $35 plus $20 per hour. Robin is paid a project fee of $25 plus $34 per hour.

Write - 2i + (9 - 3i) - (6 - 10i) as a complex number in standard form.

A bag contains yellow marbles and blue marbles, 20 in total. The number of yellow marbles is 1 less than 2 times the number of blue marbles. How many yellow marbles are there?

If b does not equal 0 , can the solution set of ax = b be a plane through the origin?

Ramon earns $1,840 each month and pays $53.40 on electricity. To the nearest tenth of a percent, what percent of Ramon's earnings are spent on electricity each month?

The city of Hamden received money for improvements of the town's park. The park committee polled a random sample of 75 residents from the town. Of the 75 residents, 27 would like to see more trees planted in the park.

Intersecting lines forming linear pair which pair of angles is a linear pair?

A small publishing company is planning to publish a new book. The production cost to include a one-time fixed cost and variable cost. There are two production methods it could use.