1. is the equation true, false, or open? explain. 8+4=-5+7. 2. which ordered pair is a solution of the equation y=-11x+4? (show your work) a. (0,-7) b. (-1, -7) c. (1, -7) d. (2,26) 3. complete the table and state the rule. input: output: 0 0 -- 3 2 -- 3 9 -- -- 5 15 6 -- 4. a plumber charges $65 per hour to fix a leak. what is an equation that relates the total cost of a leak repair (c) to the number of hours, (h), it takes the plumber to fix the leak. 5. solve for x: (show work) 2x=-6 6. solve for j: (show work) 8j-5+j=67 7. solve for m (literal equations): y=mx+b

1) 8 + 4 = -5 + 7

     12   =    2

        FALSE

2) y = -11x + 4

(0, -7):   -7 = -11(0) + 4   ⇒   -7 = 0 + 4   ⇒   -7 = 4   False

(-1, -7):  -7 = -11(-1) + 4   ⇒   -7 = 11 + 4   ⇒   -7 = 15   False

(1, -7):  -7 = -11(1) + 4   ⇒   -7 = -11 + 4   ⇒   -7 = -7   True

(2, 26): 26 = -11(2) + 4   ⇒   26 = -22 + 4   ⇒   26 = -18   False

C

3) Input       Output

     0                0

    1                 3            

    2                6  

    3                 9

    4                12  

    5                 15

    6                 18  

Rule: input is being added by 1, output is 3 times x

4) c = 65h

5) 2x = -6

    x = -3

6) 8j - 5 + j = 67

        9j - 5 = 67   added like terms (8j + j)

             +5   +5

        9j      = 72

        j      = 8

7) y = mx + b

  -b          -b  

y - b = mx