8th Winter Exam Practice #1

Front

What is the formula to convert miles per hour (mph) to feet per second (fps)?

Back

To convert mph to fps, multiply by 1.46667. (1 mph = 1.46667 fps)

Front

How do you simplify the expression: 2r - 2(7r + 8) + -4?

Back

Combine like terms: 2r - 14r - 16 + -4 = -12r - 20.

Front

Evaluate the expression b² + 4 when b = -3.

Back

Substitute -3 for b: (-3)² + 4 = 9 + 4 = 13.

Front

What is the percent decrease formula?

Back

Percent Decrease = ((Original Price - Sale Price) / Original Price) * 100.

Front

How do you find the slope of a line given two points?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What is the definition of slope in a graph?

Back

Slope is the measure of the steepness of a line, calculated as the rise over run.

Front

What is the value of 62 mph in feet per second?

Back

62 mph is approximately 90.9 feet per second.

Front

What does it mean to simplify an expression in algebra?

Back

To simplify an expression means to combine like terms and reduce it to its simplest form.

Front

What is the result of evaluating the expression 3x + 2 when x = 4?

Back

3(4) + 2 = 12 + 2 = 14.

Front

How do you calculate the percent decrease from $65.50 to $52.40?

Back

Percent Decrease = ((65.50 - 52.40) / 65.50) * 100 = 20%.