1. 
Which of the following is NOT an appropriate way to abbreviate "z times 7"?z7

2. 
The circumference of a circle is given by the formula C = 2 π r. Which of the following is/are the variable(s) in this formula?C, r

3. 
The circumference of a circle is given by the formula C = 2 π r. Which of the following is/are the constant(s) in this formula?π, r

4. 
The circumference of a circle is given by the formula C = 2 π r. Which is/are the independent variable(s) in this formula?None of the above

5. 
Which of the following are the terms in the expression ax^{2} + bx  c?ax^{2}, bx^{2}, and c

6. 
A formula is a particular type ofexpression

7. 
Evaluate the expression 3 + x  x^{2}  x^{3} for x = (  3).36

8. 
Evaluate the expression 25  xy + x  y^{3} for x = 3 and y =  2.42

9. 
The area of a trapezoid is given by the formula , where A is the altitude of the trapezoid—so be sure to bring your inhaler if you plan on climbing to the top of it—and b_{1} and b_{2} are the bases of the trapezoid. What is the area of the trapezoid shown below? 24

10. 
Annie wants to donate 5% of her income to charity. Well, she doesn't especially want to, but she has heard that she will receive a nice tax break if she does. Let I be Annie's income, and let C be the amount Annie donates to charity. Which of the following formulas best expresses the relationship between I and C?C = 0.05I
