# Algebraic Expressions

### Quizzes

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 of→expression |

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

8. |
Evaluate the expression 25 - xy + x - y^{3} for x = 3 and y = - 2. |

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? |

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 |