1. Evaluate the variable expression x y for the given values of x and y.

x = 7/12 y=-7/9

2Two cyclists start from the same point and ride in opposite directions. One cyclist rides twice as fast as the other. In 2 h, they are 78 mi apart. Find the rate of each cyclist.

3. Simplify.

x² 9x + (4x²) + 4x

4.Solve and check.

1/5 = c 2/3

5.The daily low temperatures, in degrees Fahrenheit, for 9 consecutive summer days in a city, were 56, 52, 57, 67, 54, 61, 58, 53, and 64. What was the average low temperature for those 9 days? 6.Evaluate the variable expression when a = 5, b = 8, and c = 2.

(b 2a)² + bc

7. simplify 5(2y-6)-(y+6)

8. -3/5 divide by (-3/4)

9. Graph by using the slope and the y-intercept y=5/6x -3

10.Translate into a variable expression seventeen less than the total of a number and nine

11.3x + (5y) 9x + 4x

12.Find the x- and y-intercepts.

x 7y = 14

13.Graph the line that passes through the given point and has the given slope.

P(6, 8);slope 5/4