X+y=5

3x-y=7

solve each system of equations by the addition method

In a village the number of houses and the number of flats are in the ration9:5 the number of flats and the number pf bungalows are in the ratio 10:3 there are 30 bungalows in the village. How many houses are there in the village?

A jar contained 18 red marbles, 14 green marbles, and 20 blue marbles. A marble was selected at random, the color was recorded, and the marble was placed back in the jar. The table shows the results after 60 trials.

How can I determine the variable y if I have the variable x?

For what value of x is the equations 2^2x+7 = 2^15 true?

A printer can print 27 pages in 4.5 minutes. How much time does it need to print 324 pages?

Solve for t 1/2t + 6 = - 7

Gasoline can power a car because the fuel has electrical potential energy chemical potential energy nuclear potential energy static potential energy

Caroline baked bread each day for 5 days for a bake sale. She baked 3 types of bread each day and used 2 cups of flour for each recipe. How many cups of flour did Caroline use?

Find the mean and standard deviation of each data set. Round to the nearst hundredth. 1. 4 8 5 12 3 9 5 2

Julia needs to cut 4 pieces of yarn, each with the same length and a piece of yarn 7.75 inches long let x represent the length of each of the equal pieces of yarn that Julia decides to cut.