End of Semester Test: Algebra 2B practice
(Plato, 11 wrong – marked)
Ms. Walker's class set up an online fund with a goal to raise $1,280 to go on a field trip. Ms.
Walker starts the fund by depositing $5. Each week the balance of the fund is twice the balance
of the previous week. Which equation can be used to find the number of weeks, x, after which
the balance of the fund will reach 1,280, and how many weeks will it take to reach the class
goal? - Answer: 5(2)^x = 1,280; x = 8
Sam purchased a new car for $17,930. The value of the car depreciated by 19% per year. -
Answer: WRONG - 17,930 (0.81)^x _< 1900
Which expressions are equivalent to the given expression. - Answer: log10(20x^5) - 1, log10
(10x)
Page 1 of 7
, To keep producing a specific shirt style, a company must make a profit of at least $5,000 on the
style. Complete the statements about the about the system's possible solutions - Answer:
[meets]
[meets]
Leo is looking at two different savings plans. Leo wrote a system of equations to represent the
account balance of either plan, y, after x years. Which two equations are part of the system? -
Answer: WRONG - 400(1.02)^x
Correct - 400e^0.02x
If the measure of angle 0 is 7x/4, which statements are true? - Answer: (Not all correct answers
were selected)
tan(0) = -1
the measure of the reference angle is 45°
Consider the equation, cos(0) = -3/10. If 0 is an angle in quadrant II, what is the value of tan(0) -
Answer: -sqrt 91/3
When a graph is symmetric about the origin, it is an ___ function. When a graph is symmetric
about the y-axis, it is an ___ function. A function is considered ___ if f(-x) = f(x), and it is
considered ___ odd if f(-x) = -f(x) - Answer: [odd]
[even]
[even] [odd]
Consider the function y=1/2cos(2x)-1 Which statement is true about the function? - Answer:
The midline of the function is y = -1
To create function d, the graph of the parent cosine function undergoes these transformations: -
Answer: horizontal shift [right 0.5 of a unit]
Page 2 of 7
(Plato, 11 wrong – marked)
Ms. Walker's class set up an online fund with a goal to raise $1,280 to go on a field trip. Ms.
Walker starts the fund by depositing $5. Each week the balance of the fund is twice the balance
of the previous week. Which equation can be used to find the number of weeks, x, after which
the balance of the fund will reach 1,280, and how many weeks will it take to reach the class
goal? - Answer: 5(2)^x = 1,280; x = 8
Sam purchased a new car for $17,930. The value of the car depreciated by 19% per year. -
Answer: WRONG - 17,930 (0.81)^x _< 1900
Which expressions are equivalent to the given expression. - Answer: log10(20x^5) - 1, log10
(10x)
Page 1 of 7
, To keep producing a specific shirt style, a company must make a profit of at least $5,000 on the
style. Complete the statements about the about the system's possible solutions - Answer:
[meets]
[meets]
Leo is looking at two different savings plans. Leo wrote a system of equations to represent the
account balance of either plan, y, after x years. Which two equations are part of the system? -
Answer: WRONG - 400(1.02)^x
Correct - 400e^0.02x
If the measure of angle 0 is 7x/4, which statements are true? - Answer: (Not all correct answers
were selected)
tan(0) = -1
the measure of the reference angle is 45°
Consider the equation, cos(0) = -3/10. If 0 is an angle in quadrant II, what is the value of tan(0) -
Answer: -sqrt 91/3
When a graph is symmetric about the origin, it is an ___ function. When a graph is symmetric
about the y-axis, it is an ___ function. A function is considered ___ if f(-x) = f(x), and it is
considered ___ odd if f(-x) = -f(x) - Answer: [odd]
[even]
[even] [odd]
Consider the function y=1/2cos(2x)-1 Which statement is true about the function? - Answer:
The midline of the function is y = -1
To create function d, the graph of the parent cosine function undergoes these transformations: -
Answer: horizontal shift [right 0.5 of a unit]
Page 2 of 7
