Cumulative Exam — Cumulative exam

Question 1

When a number is added to of itself, the result is 24. The equation that models this problem is n + n = 24. What is the value n?

Revolt · Accepted Answer

n = 20

Question 2

The resale value of a textbook decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x owners?

Revolt · Accepted Answer

f(x) = 85(1 – 0.25)x

Question 3

Line JK passes through points J(–3, 11) and K(1, –3). What is the equation of line JK in standard form?

Revolt · Accepted Answer

7x + 2y = 1

Question 4

Which is the best description of the graph of the function f(x) = 60()x?

Revolt · Accepted Answer

The graph has an initial value of 60, and each successive term is determined by multiplying by .

Question 5

Samir, a carpenter, spent $300 on specialty tools to make toy horses for children. For each horse he makes, he spends $75 on supplies. He charges $125 for each horse. How many horses must Samir sell in order to break even?

Revolt · Accepted Answer

6

Question 6

Which best describes the range of the function f(x) = 2(3)x?

Revolt · Accepted Answer

y > 0

Question 7

Gina wants to take dance classes. She compares two dance studios to determine which has the best deal for her. Dance World charges a rate for each class. Toe Tappers charges a rate for each class plus a one-time registration fee. The system of equations shown models the total costs for taking x classes at each.Dance World: y = 15xToe Tappers: y = 25 + 12.5xHow many classes would Gina need to take for the total cost to be the same at both dance studios?

Revolt · Accepted Answer

10

Cumulative Exam — Cumulative exam Answers

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