7th Grade Math

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where C is the circumference and r is the radius.

Front

How do you solve for x in the equation 51 - x = 45?

Back

To solve for x, subtract 45 from 51: x = 51 - 45, so x = 6.

Front

What does the inequality s - 10 ≤ 1 represent?

Back

It represents that the value of s must be less than or equal to 11.

Front

What is the definition of circumference?

Back

The distance around a circle.

Front

How do you calculate the total cost of a taxi ride if the base fare is $3 and the cost per mile is $1.50?

Back

Total cost = base fare + (cost per mile * number of miles).

Front

If a circle has a radius of 7 inches, what is its circumference?

Back

C = 2π(7) ≈ 43.98 inches.

Front

What is the first step in solving the equation 2x + 3 = 11?

Back

Subtract 3 from both sides: 2x = 8.

Front

What does it mean to isolate a variable in an equation?

Back

To isolate a variable means to get the variable alone on one side of the equation.

Front

In the equation y = mx + b, what do m and b represent?

Back

m is the slope of the line, and b is the y-intercept.

Front

How do you convert an inequality into an equation?

Back

Replace the inequality sign with an equal sign to find the boundary point.