7th grade Math Review

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.

Front

What does the inequality x < 3 represent on a number line?

Back

It represents all numbers less than 3, with an open circle at 3.

Front

How do you solve the equation 8 = 2x - 12?

Back

Add 12 to both sides to get 20 = 2x, then divide by 2 to find x = 10.

Front

What is the radius of a circle if the diameter is 18?

Back

Radius = Diameter / 2 = 18 / 2 = 9.

Front

How do you solve for n in the equation 6n + 4 = -26?

Back

Subtract 4 from both sides to get 6n = -30, then divide by 6 to find n = -5.

Front

What is the value of π (pi) approximately?

Back

π ≈ 3.14.

Front

What is the difference between x ≥ 3 and x > 3?

Back

x ≥ 3 includes 3, while x > 3 does not.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

How do you find the area of a rectangle?

Back

Area = length × width.

Front

What does it mean to solve an equation?

Back

To find the value(s) of the variable that make the equation true.