Question 1

Which statement is not always true?

Accepted Answer

The product of two irrational numbers is irrational.

Answer

The product of two rational numbers is rational.

Answer

The sum of a rational number and an irrational number is irrational.

Answer

The sum of two rational numbers is rational.

Question 2

A satellite television company charges a one-time installation fee and a monthly service charge. The total cost is modeled by the function y = 40 + 90x. Which statement represents the meaning of each part of the function?

Accepted Answer

y is the total cost, x is the number of months of service, $40 is the installation fee, and $90 is the service charge per month.

Answer

y is the total cost, x is the number of months of service, $90 is the installation fee, and $40 is the service charge per month.

Answer

x is the total cost, y is the number of months of service, $90 is the installation fee, and $40 is the service charge per month.

Answer

x is the total cost, y is the number of months of service, $40 is the installation fee, and $90 is the service charge per month.

Question 3

If 4x² - 100 = 0, the roots of the equation are

Accepted Answer

-5 and 5

Answer

-5, only

Answer

-25 and 25

Answer

-25, only

Question 4

Which point is not on the graph represented by y=x² +3x-6?

Accepted Answer

(3,-6)

Answer

(-4,-2)

Answer

(2,4)

Answer

(-6,12)

Question 5

Which situation could be modeled by using a linear function?

Accepted Answer

the cost of cell phone service that charges a base amount plus 20 cents per minute

Answer

the concentration of medicine in a person’s body that decays by a factor of one-third every hour

Answer

a population of bacteria that doubles every 4.5 hours

Answer

a bank account balance that grows at a rate of 5% per year, compounded annually

Related quizzes

Related quizzes