Evaluate each expression, remembering the order of operations. Show your work. 1. 15 + 6 ∙ 3
2. (4 + 5) ∙ 2

3.
8 6
2
−

4.
13+15
20 6 −

Evaluate each expression using these replacement values.
a = 6
b = 7
c = 5
d = −2

9.
5. 4 ∙ 2 + a
6. ab + 42
7. (a + c) + b
8. 4b + c
b c +

10.
3
a d +
b c

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The graph shows the rate at which paint is used to paint a wall. enter values to complete each statement below based on the graph. when 1 gallon of paint has been used, ( # ) square feet of the wall will be painted. the unit rate is ( # )square feet per gallon.

Which of the following domains provide a real value periods

Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.