What word phrase can you use to represent "5x + 2"?

the sum of five times a number x and two

five times the sum of a number x and two

two times the sum of a number x and five

a number x times the sum of five and two

What is the definition of a coefficient?

The number in front of a variable

The letter used to represent a quantity

The little number or letter used to raise to a power

The number in back of a variable

A random sample of the students in two different universities were surveyed for their sleep habits. The results are shown in the table above. Which of the following statements is supported by the information in the table?

The hours of sleep per night varies more among students at University A than students at University B.

More students attend University B than University A.

More than half of the students at University B get 7 hours of sleep per night.

Half of the students at University A get 6 hours of sleep per night.

A company polls a group of 1,067 people randomly selected to represent New York City. The company determines that 10% of the sample group does not like cheese, while the remaining 90% does like cheese. The poll is true with a 3% margin of error. If there are 8.5 million people in New York City, what is the best estimate for the number of people who do not like cheese?

Between 595,000 and 1,105,000 people

Between 425,000 and 1,275,000 people

Between 722,500 and 977,500 people

A research assistant randomly selected 75 undergraduate students from the list of all students enrolled in the psychology-degree program at a large university. She asked each of the 75 students, "How many minutes per day do you typically spend reading?" The mean reading time in the sample was 89 minutes, and the margin or error for this estimate was 4.28 minutes. Another research assistant intends to replicate the survey and will most attempt to get a smaller margin of error. Which of the following samples will most likely result in a smaller margin of error for the estimated mean time students in the psychology-degree program read per day?

300 randomly selected undergraduate psychology-degree program students

40 randomly selected undergraduate psychology-degree program students

40 randomly selected undergraduate students from all degree programs at the college

300 randomly selected undergraduate students from all degree programs at the college

A researcher wanted to know if there is an association between exercise and sleep for the population of 16-year-olds in the United States. She obtained survey responses from a random sample of 2000 United States 16-year-olds and found convincing evidence of a positive association between exercise and sleep. Which of the following conclusions is well supported by the data?

There is a positive association between exercise and sleep for 16-year-olds in the United States.

There is a positive association between exercise and sleep for 16-year-olds in the world.

Using exercise and sleep as defined by the study, an increase in sleep is caused by an increase of exercise for 16-year-olds in the United States.

Using exercise and sleep as defined by the study, an increase in sleep is caused by an increase of exercise for 16-year-olds in the world.

A researcher places two colonies of bacteria into two petri dishes that each have area 10 square centimeters. After the initial placement of the bacteria the researcher measures and records the area covered by the bacteria in each dish every ten minutes. The data for each dish were fit by a smooth curve, as shown above, where each curve represents the area of a dish covered by bacteria as a function of time, in hours. Which of the following is a correct statement about the data above?

At time t = 0, bacteria covers 10% of Dish 1 and 20% of Dish 2.

At time t = 0, both dishes are 100% covered by bacteria.

At time t= 0, Dish 2 is covered with 50% more bacteria than Dish 1.

For the first hour, the area covered in Dish 2 is increasing at a higher average rate than the area covered in Dish 1.

A researcher places two colonies of bacteria into two petri dishes that each have area 10 square centimeters. After the initial placement of the bacteria the researcher measures and records the area covered by the bacteria in each dish every ten minutes. The data for each dish were fit by a smooth curve, as shown above, where each curve represents the area of a dish covered by bacteria as a function of time, in hours. Which of the following is a correct statement about the data above?

At time t = 0, bacteria covers 10% of Dish 1 and 20% of Dish 2.

At time t = 0, both dishes are 100% covered by bacteria.

At time t= 0, Dish 2 is covered with 50% more bacteria than Dish 1.

For the first hour, the area covered in Dish 2 is increasing at a higher average rate than the area covered in Dish 1.

SAT math practice

Authored by teacherSusan Huang

Mathematics

9th - 12th Grade

CCSS covered

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

CCSS.HSA.CED.A.2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Tags

CCSS.HSF.LE.B.5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tags

CCSS.7.EE.B.4A

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tags

CCSS.HSA.REI.D.10

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If 5 less than 3 times a certain number is 7 less than the number, what is the number?

-1

-2

Tags

CCSS.8.EE.C.7B

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tags

CCSS.HSF.IF.A.2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

In a certain game, a player can solve easy or hard puzzles. A player earns 30 points for solving an easy puzzle and 60 points for solving a hard puzzle. Tina solved a total of 50 puzzles playing this game, earning 1,950 points in all. How many hard puzzles did Tina solve?

Tags

CCSS.8.EE.C.8C

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SAT math practice

If 5 less than 3 times a certain number is 7 less than the number, what is the number?

In a certain game, a player can solve easy or hard puzzles. A player earns 30 points for solving an easy puzzle and 60 points for solving a hard puzzle. Tina solved a total of 50 puzzles playing this game, earning 1,950 points in all. How many hard puzzles did Tina solve?

What word phrase can you use to represent "5x + 2"?

8v - 4(v + 8) = 8

Kamilah's weight has tripled since her first birthday. If w represents the amount Kamilah weighed on her first birthday, write an expression to show how much Kamilah weighs now.

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