Review math 1st Semester

What is the solution to the equation @@x^2 - 9 = 0@@?

• x = 3

• x = -3

• x = 0

• x = 9

• 0.71

• 0.57

• 0.81

• 0.61

Evaluate the expression @@5x^2 - 3y - \left|-16+x\right| + 8y@@ when x=-2 and y=4.

• 20

• 22

• 18

• 24

What is the perimeter of a square with side length 4?

• 12 units

• 14 units

• 16 units

• 18 units

• 42

• 49

• 56

• 36

What is the value of @@\frac{3}{4} + \frac{1}{4}@@?

• 0

• 1

• 2

• 3

What is the formula for the area of a triangle?

• @@rac{1}{2} imes base imes height@@

• base imes height

• @@rac{1}{3} imes base imes height@@

• base + height

What is the decimal equivalent of 0.25?

• 25% or @@\frac{1}{4}@@

• 50%

• 10%

• 75%

What is the slope of the line represented by the equation @@y = 2x + 3@@?

• 1

• 2

• 3

• 4

What is the area of a rectangle with length 5 and width 3?

• 12 square units

• 15 square units

• 18 square units

• 20 square units