Final Grade of the 6 Weeks (Worth 2 Grades)

Front

Solve: 7x = 3x + 24

Back

6

Front

When Lisa was born, her parents put $8,000 into a college fund account that earned 9% simple interest. What is the interest earned after 18 years?

Back

$12,960

Front

Peppy Pets charges a flat fee of $15 plus $3 per hour to keep a dog during the day. Happy Hounds charges a flat fee of $21 plus $1 per hour. For how many hours is the total fee charged by the companies the same?

Back

3

Front

Jenny writes the equation y = 1/2x + 5. Why is she incorrect?

Back

The slope is -2, the equation should be y = -2x + 5

Front

A rental car agency charges $30.00 per day plus per mile $0.15. Another rental car agency charges $36.00 per day plus $0.10 per mile. How many miles would have to be driven in one day for both rental agencies to cost the same amount to rent?

Back

120

Front

Define simple interest.

Back

Simple interest is calculated using the formula: I = PRT, where I is the interest, P is the principal amount, R is the rate of interest per year, and T is the time in years.

Front

What is the formula for finding the slope of a line?

Back

The slope (m) is calculated as m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x = 0.

Front

How do you solve a linear equation with variables on both sides?

Back

To solve, first isolate the variable by moving all terms involving the variable to one side and constant terms to the other side.

Front

What is a flat fee in a pricing model?

Back

A flat fee is a fixed charge that does not change regardless of the amount of service used.