Models and Substitution

You traveled 52 miles. Then, your avg rate is 12 mph. What algebraic expression models the distance?

• 52+12/h

• 12/h-52

• 12h+52

• 12-52

Evaluate expression: 5a + b for a= 6 and b= 3

• 33

• 36

• 30

• 59

7. Solve the system of linear equations: 2x + 5y = 13 and 3x - 2y = 4

• x = 4, y = 4

• x = 3, y = 1

• x = 2, y = 3

• x = 5, y = 2

Solve the following system of equations: 5x - 4y = 3 and 2x + 3y = 8

• x = 4, y = 3

• x = 2, y = 1

• x = 3, y = 2

• x = 1, y = 5

10. Solve the following system of equations: 5x - 4y = 3 and 2x + 3y = 8

• x = 4, y = 3

• x = 2, y = 1

• x = 3, y = 2

• x = 1, y = 5

Evaluate expression:
½a - 5b
when a= -12 and b= -3

• -21

• -9

• 9

• 21

What is the value of
xy + 2z,
when x = -2, y = 4 and z = -5

• -2

• 28

• 18

• -18

Find the value of this expression if c = 4
14 + 3c² - 15 + c

• 37

• 51

• 41

• 121

Solve: 6x² + 3y ; x= 2 and y= 4

• 76

• 158

• 36

Three times a number increased by nine

• 3h-9

• 3(h-9)

• 3(h+9)

• 3h+9