Brian has a model collection of cars, trains, amd fire engines. He has 28 cars. The number of fire engines is 2 times the number of trains. He has 67 models in all. How many of each type of model does he have?

What is difference of 4/5 - 5//7

Grandpa's age is 6 yrs less than 6 times junior's age. The sum of their age is 78. find each of their ages?

What does h equal to: 2/3h-1/3h+11=8

Find the solution to the equations. 3x - y = - 4 X + y = 0

How would you write an equation of a circle that is (-3,2) with a radius of 5

What is the next number in the sequence of 12, 13, 15, 17, 111, 113, 117, 119, 123?

There are 6 gray keys for every seven blue keys write the possible ratios for gray to black keys

What formula do you use to find the volume of a triangle with a triangle base?

What is 6.825 as a mixed number in simplest form

Mark wants to paint a mural he has one and 1/3 gallons of yellow paint 1 1/4 gallon of green paint and 7/8 gallons of blue paint mart plans plans to use 3/4 gallons of each paint color how many gallons of paint will he have left after painting the