7th grade Math Review

Front

What does the inequality x ≥ -2 represent on a number line?

Back

It represents all numbers greater than or equal to -2, including -2 itself.

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 does the inequality x > -2 indicate?

Back

It indicates all numbers greater than -2, not including -2.

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius of the circle.

Front

If a circle has an area of 28.26 cm², what is its radius?

Back

The radius is approximately 3 cm, since Area = π(3)² = 28.26.

Front

What is the total cost equation for renting a paddle boat?

Back

The equation is 33 = 2h + 15.

Front

How do you isolate the variable h in the equation 33 = 2h + 15?

Back

Subtract 15 from both sides to get 18 = 2h, then divide by 2 to find h = 9.

Front

What does the inequality x ≤ -2 mean on a number line?

Back

It represents all numbers less than or equal to -2, including -2.

Front

What is the solution to the inequality x < -2?

Back

It represents all numbers less than -2, not including -2.

Front

How do you find the area of a circle with a radius of 5 cm?

Back

Area = π(5)² = 25π ≈ 78.54 cm².