Answers Common Core Algebra II - MA3111 B-CRCumulative Exam

Cumulative Exam — Cumulative exam Answers

40 verified answers

Which graph shows the solution to the equation below?

On a coordinate plane, 2 curves intersect at (1, 1). One curve curves up and to the right from quadrant 3 into quadrant 1. The other curve curves down from quadrant 1 into quadrant 4.

On a coordinate plane, 2 identical curves are shown. One curve starts at y = negative 3, and the other curve starts at y = 1.

On a coordinate plane, a curve and a line are shown.

On a coordinate plane, a curve and a cubic function are shown.

Free Preview

Which expression is equivalent to cos120°?

cos240°

cos300°

cos420°

Which graph represents ?

On a coordinate plane, a cubic function is shown. It has a point of inflection at x = negative 3 and it crosses the x-axis at x = negative 1.

On a coordinate plane, a cubic function is shown. It has a point of inflection at x = negative 3 and it crosses the x-axis at x = negative 5.

On a coordinate plane, a cubic function is shown. It has a point of inflection at x = 6 and it crosses the x-axis at x = 7.

On a coordinate plane, a cubic function is shown. It has a point of inflection at x = 6 and it crosses the x-axis at x = 5.

Which of the following is a binomial experiment?

Rolling a six-sided number cube 24 times and recording if a 4 comes up

Rolling a six-sided number cube and recording the number until a 4 comes up

Rolling a six-sided number cube and recording the number until an even number comes up

Rolling a six-sided number cube 24 times and recording the number that comes up

Given that , what is the value of ?

Plus-or-minus StartRoot eight-thirds EndFraction

Plus-or-minus StartRoot eleven-eighths EndFraction

Eleven-eighths

Eight-thirds

What is the value of ?

What is the solution of ?

x = 5

x = 13

x = 20

x = 328

What is the following sum?

4 x (RootIndex 3 StartRoot 2 y EndRoot) + 12 x squared y (RootIndex 3 StartRoot 2 y squared EndRoot)

8 x (RootIndex 3 StartRoot x y EndRoot) + 12 x cubed y squared (RootIndex 3 StartRoot 6 y EndRoot)

16 x cubed y (RootIndex 3 StartRoot 2 y squared EndRoot)

48 x cubed y (RootIndex 3 StartRoot 2 y EndRoot)

The histogram below shows the number of properties in a town that sold within certain time periods. Why might the graph be considered misleading?

The scales on the x- and y-axes are unequal.

The interval on the x-axis is too large for the data set.

The scale on the y-axis misrepresents the difference in the heights of the bars.

The interval on the y-axis is too large for the data set.

The graph of a logarithmic function is shown below.What is the domain of the function?

x < 0

x > 0

x < 1

all real numbers

What is the value of ?

–4.00

–0.25

1.51

2.41

Researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a grass diet. This method of gathering data is classified as

a census.

a sample survey.

an experiment.

an observational study.

Omar recorded the number of hours he worked each week for a year. Below is a random sample that he took from his data.13, 17, 9, 21What is the standard deviation for the data?Standard deviation:

4.4

5.2

26.7

A supervisor finds the mean number of miles that the employees in a department live from work. He finds and . Which mileage is within a z-score of -1.5?

21 miles

24 miles

36 miles

41 miles

Which set of transformations is needed to graph f(x) = –0.1cos(x) – 4 from the parent cosine function?

reflection across the y-axis, vertical compression by a factor of 0.1, vertical translation 4 units up

reflection across the x-axis, vertical compression by a factor of 0.1, vertical translation 4 units down

vertical stretching by a factor of 0.1, vertical translation 4 units down, reflection across the y-axis

vertical stretching by a factor of 0.1, vertical translation 4 units up, reflection across the x-axis

The College Board states that the average math SAT score is 514 with a standard deviation of 117. Colleen gathered data from 50 students in her graduating class and found the average score to be 529. She thinks that her class’s math SAT score is different from the average. Which of the following shows the correct z-statistic for this situation?

0.02

0.91

1.26

5.67

A simple random sample of 50 adults was surveyed, and it was found that the mean amount of time that they spend surfing the Internet per day is 54.2 minutes, with a standard deviation of 14.0 minutes. What is the 99% confidence interval (z-score = 2.58) for the number of minutes that an adult spends surfing the Internet per day?Remember, the margin of error, ME, can be determined using the formula .

49.1 minutes to 59.3 minutes

50.3 minutes to 58.1 minutes

54.2 minutes to 58.1 minutes

54.2 minutes to 59.3 minutes

According to a survey, 15% of city workers take the bus to work. Donatella randomly surveys 10 workers. What is the probability that exactly 6 workers take the bus to work? Round the answer to the nearest thousandth.