U3: Review Quiz

For what value of x is the statement f(x)-g(x)=0 true?

• x=2

• x= - 1/2

• x=0

• x= - 3/2

Tags

CCSS.8.EE.C.8B

A function passes through the point (1,6) and (3,54). Select all of the equations that could represent this function.

• f(x)=2(3^x)

• g(x)=6^x

• h(x)=2x+48

• k(x)=24x-18

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

• The number of stamps increases at a constant rate per year.

• The number of stamps increases at a rate of 25% per year.

• The number of stamps increases at a rate of 125% per year.

• The number of stamps increases at a rate of 100 stamps per year.

Tags

CCSS.HSF-IF.C.8B

Select all of the linear functions from the equations below.

• f(x) = | x | - 6

• f(x) = -4 ( 2x + 5 ) + 2x - 3

• y = x² + 4

• g(x) = 2x + 4

• y = -12

Tags

CCSS.8.F.A.3

The linear function y = 15x represents the cost y (in dollars) of x tickets for a museum. Each customer can buy a maximum of four tickets. What are the domain and range of the function? Is the domain discrete or continuous?

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Let f(x) = 2x - 2^x - 1. Which of the following expressions is less than 0? Select all that apply.

• 4 (f(1) - f(2))

• f(0)

• -2f(3)

• f(-4) - f(4)

Tags

CCSS.HSF.IF.A.2

• f(h) = 5h + 15

• f(h) = 10h + 15

• f(h) = 5h + 5

• f(h) = 5h + 10

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A turtle population grows in a manner that can be represented by a geometric sequence. Identify the geometric sequence that models this growth.

• f(n) = 5(3^n-1)

• f(n) = 3(5^n-1)

• f(n) = 3 + 5(n - 1)

• f(n) = 5 + (n-1)3

Tags

CCSS.HSF.LE.A.2

The number of bacteria in a Petri dish was 620 at the start of an experiment. After two hours, the number of bacteria is 1250.

Which of the following equations represents the growth in the number of bacteria (b) in the Petri dish after h hours?

• b = 2.02h + 620

• b = 630h + 620

• b = 620(1.42)^h

• b = 620 (2.02)^h

Tags

CCSS.HSF.LE.A.2

Talia investigates the population of Virginia from 1950 to the present. She writes the function to express the population P(t), in millions of people, t years after 1950. In 2000, the population of Virginia was approximately 8 million people. She expresses this as P(j) = k, where j and k are constants. What are the values of j and k?

• j =2000 ; k = 8,000,000

• j = 0 ; k = 8

• j = 20 ; k = 8

• j = 50 ; k = 8

Tags

CCSS.HSF.LE.B.5