# Grade 9 Math

## What is the value of x in the equation 2x + 5 = 15?

6

## Simplify the expression 3(2x + 5) - 4(3x - 2).

-2x + 23

## Find the value of y in the equation 4y - 7 = 25.

8.5

## Solve the equation 3(x + 4) = 27.

9

## What is the slope of the line passing through the points (2, 5) and (4, 9)?

2.5

## Find the area of a triangle with base 8 cm and height 5 cm.

20 cm

## If the radius of a circle is 4 cm, what is its circumference?

8π cm

## What is the square root of 49?

7

## Simplify the expression 2x² + 5x - 3x² + 4.

-x² + 2x + 4

## Find the value of x in the equation 4(x - 3) = 12.

6