Substitution and elimination for

Y=-3x+5

5x-4y=-3

Jason had 126 dollars to spend on 6 books. After buying them he had 18 dollars. How much did each book cost?

In ΔABC, AB = 20 cm, AC = 15 cm. The length of the altitude AN is 12 cm. Prove that ΔABC is a right triangle.

5) At a certain high school, there are three sports: baseball, basketball, and football. Some athletes at this school play two of these three, but no athlete plays in all three.

4. A laptop and a mobile phone were bought for 40000 and 24000 respective shopkeeper made a profit of 8% on laptop and a loss of 12% on mobile phone to find his gain or loss percent on the whole transaction.

Area model represents the product of 27 and a number what is the other number

How would I write and work 3 1/5 as a decimal

The lengths of the legs of a right triangle are consecutive even integers. The hypotenuse is 58 inches. What is the sum of the lengths of the legs in inches?

In the XYZ contest, a school may enter 1, 2, 3 or at most 4 teams. Suppose 247 teams are entered in the XYZ contest. What is the smallest number of schools that could have entered the XYZ contest?

Is the number 5 prime composite, nethieror prime

At a basketball game, a vender sold a combined total of 225 sodas and hot dogs. The number of sodas sold was 49 more than the number of hot dogs sold. Find the number of sodas sold and the number of hot dogs sold