1.
Which of the following is NOT an appropriate way to abbreviate "z times 7"? -> z 7
True
False

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

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

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

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

6.
A formula is a particular type of -> expression
True
False

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

8.
Evaluate the expression 25 - xy + x - y ^{3} for x = 3 and y = - 2. -> 42
True
False

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
True
False

10.
Annie wants to donate 5% of her income to charity. Well, she doesn't especially want to, but she's heard that she'll 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
True
False