Algebraic Expressions and Formulas

Simplify the expression: 3x + 2y - 5x + 4y

• -2x + 6y

• x + 6y

• -2x + 6y

• -2x + 2y

Evaluate the expression when x = 2 and y = 5: 4x + 3y

• 22

• 19

• 27

• 23

Simplify the expression: 2(x + 3) - 4(x - 2)

• -2x - 14

• 2x + 14

• -2x + 14

• -2x + 10

Evaluate the expression when a = 3 and b = 2: 4a^2b - 2ab^2 + 3ab

• 72

• 84

• 96

• 90

Use the formula A = lw to find the area of a rectangle with length 6 and width 4

• 10

• 16

• 24

• 12

Use the formula C = 2πr to find the circumference of a circle with radius 5

• 25π

• π

• 10

• 10π

Use the formula V = πr^2h to find the volume of a cylinder with radius 3 and height 8

• 64π

• 24π

• 72π

• 12π

Define the term 'algebraic expression'

• A mathematical phrase that contains only numbers and operations.

• A mathematical expression that contains only variables and operations.

• A mathematical phrase that contains variables, numbers, and operations.

• A mathematical equation that contains variables and numbers.

Use the formula A = lw to find the area of a rectangle with length 8 and width 2

• 4

• 16

• 10

• 12

Evaluate the expression when a = 4 and b = 3: 5a^2b - 3ab^2 + 2ab

• -246

• 369

• 123

• 246