Equations

• The cost of 5 notebooks is greater than the cost of 3 notebooks plus a $2 pen.

• The cost of 5 notebooks is less than the cost of 3 notebooks with a $2-off coupon.

• The cost of 5 notebooks is less than the cost of 3 notebooks plus a $2 pen.

• The cost of 5 notebooks is $2 greater than the price of 3 notebooks.

• -4

• 2/3

• 6

• 5/2

• x = 10

• x = 5

• x = 3

• x = -3

• x = 10

• x = 9

• x = -10

• x = -9

The Frederick County Fair costs $15.00 to get in and $2.50 per ride, while the Montgomery County Fair costs $10.00 to get in and $3.00 per ride. Which equations could be used to determine how many rides you would need to go on for both fairs to be of equal value?

• 15x + 2.5 = 10x + 3

• 15 - 2.5x = 10 - 3x

• 15 + 2.5x = 10 + 3x

• 15 - 10 = 2.5x + 3x

Joe’s Canoes charges an initial fee of $20 plus $4 an hour. Callie’s Canoes charges a flat rate of $14 an hour. Find the number of hours for which the total amount that both places charge would be the same. (Use an equation to help solve the problem)

• 3 hours

• 4 hours

• 1 hour

• 2 hours

Write the equation for the model.

• 3x + x = -x - 3x

• -x + 1 = 3x - 3

• 3x + 1 = -x - 3

Write the equation for the model.

• 2x + 7 = -3x + 2

• 2x - 2 = 3x - 7

• 2x + 2 = -3x + 7

Solve:
10x + 9 = 4x - 9

• 0

• 3

• -3

• -18