Cumulative Exam — Cumulative exam Answers

Sun, a kayaker, paddles 8 miles upstream (against the current) in 2 hours. Returning to her original location, she paddles downstream (with the current) the same distance in 1 hour. The equations represent x, the paddling speed, and y, the speed of the current.2(x – y) = a b(x + y) = 8Which are true? Select two options.a = 8b = 8a = 1b = 1a = b

What is the coefficient of x after simplifying (−x−5)2?

What is the factored form of x2 – 6x – 16?

The diagram represents the polynomial 4x2 + 23x – 72.

What are the domain and range of f(x) = 4x – 8?

The tile along the edge of a triangular community pool needs to be replaced.

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?

A rectangle with an area of x2 – 4x – 12 square units is represented by the model.

On a piano, the formula to determine the frequency, f, for the G above A440 is . Which of the following is equivalent to f?

The variables A, B, and C represent polynomials where A = x + 1, B = x2 + 2x − 1, and C = 2x. What is AB + C in simplest form?

Which represents the polynomial written in standard form?4m – 2m4 – 6m2 + 9

A perfect square trinomial can be represented by a square model with equivalent length and width. Which polynomial can be represented by a perfect square model?

Simplify the expression –3(x + 3)2 – 3 + 3x. What is the simplified expression in standard form?

Which is the completely factored form of 12x4 + 39x3 + 9x2?

What is the inverse of the function f(x) = 4x + 8?

Which term can be added to the list so that the greatest common factor of the three terms is 12h3?36h3, 12h6, __________

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