ACT Math Prep 9th Grade

Front

What is the quadratic formula used to find the roots of a quadratic equation?

Back

The quadratic formula is x = (-b ± √(b² - 4ac)) / (2a).

Tags

CCSS.HSA-REI.B.4B

Front

How do you calculate the perimeter of a square?

Back

The perimeter of a square is calculated by P = 4s, where s is the length of a side.

Tags

CCSS.4.MD.A.3

Front

What is the standard form of a quadratic equation?

Back

The standard form of a quadratic equation is ax² + bx + c = 0, where a, b, and c are constants.

Front

How do you simplify the expression 4x + 2y - 3x + y?

Back

Combine like terms to get x + 3y.

Tags

CCSS.7.EE.A.1

Front

What is the formula for the volume of a cube?

Back

The volume of a cube is V = s³, where s is the length of a side.

Tags

CCSS.5.MD.C.5B

CCSS.6.G.A.2

Front

What does the discriminant of a quadratic equation tell you?

Back

The discriminant (b² - 4ac) indicates the nature of the roots: if positive, two distinct real roots; if zero, one real root; if negative, no real roots.

Tags

CCSS.HSA-REI.B.4B

Front

How do you find the area of a square?

Back

The area of a square is calculated by A = s², where s is the length of a side.

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

What is the relationship between the roots and coefficients of a quadratic equation?

Back

For a quadratic equation ax² + bx + c = 0, the sum of the roots is -b/a and the product of the roots is c/a.

Tags

CCSS.HSA-REI.B.4B

Front

How do you evaluate an expression like b² - 4ac for specific values of a, b, and c?

Back

Substitute the values of a, b, and c into the expression and perform the arithmetic operations.

Tags

CCSS.6.EE.A.2C

Front

What is the formula for the perimeter of a rectangle?

Back

The perimeter of a rectangle is P = 2(l + w), where l is the length and w is the width.

Tags

CCSS.3.MD.D.8