# AMU MATH 125 Test Week 2 answers

## AMU MATH 125 Test Week 2 question 1

Simplify: 5(x + 2) – (x + 1)

A.4x + 4

B.4x – 9

C.4x + 9

D.4x + 11

## AMU MATH 125 Test Week 2 Question 2

The simple interest (I) on a certain amount of money (p) that is invested at a specified interest rate (r) for a specific period of time (t) can be found by the formula I = prt. Find the interest on a principal of \$800 invested at 7% yearly for 5 years.

A.\$280.00

B.\$25,200.00

C.\$252.00

D.\$28,000

## AMU MATH 125 Test Week 2 Question 3

The heat energy from electricity is given by the formula E=0.238I2 R t. Find E when I = 50 amps, R = 16 ohms, and t = 150 s. Round answer to the nearest hundredth.

A.1,285,200.00

B.1,428,000.00

C.1,570,800.00

D.28,560.00

## AMU MATH 125 Test Week 2 Question 4

State whether the equation is a linear equation in one variable or not. 3x(5 – x) = x + 3

A.Linear

B.Not linear

## AMU MATH 125 Test Week 2 Question 5

Solve: –3 + x = 33

A.{–30}

B.{–36}

C.{30}

D.{36}

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Solve for x:

A.

B.

C.

D.

## AMU MATH 125 Test Week 2 Question 7

Use the formula F = ma to solve. Find the acceleration for a force F = 500 newtons and a mass of 50 kg.

A.10 m/s2

B.2500 m/s2

C.500 m/s2

D.100 m/s2

## AMU MATH 125 Test Week 2 Question 8

Steve earned scores of 87 and 81 on his first two exams. What will his average grade be if he gets a 90 on his third exam?

A.81

B.90

C.87

D.86

## AMU MATH 125 Test Week 2 Question 9

A basketball team played 72 games and won 4 more games than it lost. Find the number of games the team won.

A.36 games

B.30 games

C.38 games

D.34 games

## AMU MATH 125 Test Week 2 Question 10

A person sold their house for \$80,000 and made a profit of 14%. How much did they pay for their home?

A.\$70,175.44

B.\$77,192.98

C.\$91,200.00

D.\$63,157.89

## AMU MATH 125 Test Week 2 Question 11

If everyone had the same body proportions, your weight in pounds would vary directly with the cube of your height in feet.   Assume the average height and weight of a female in your math class is 5’5″ and 145 pounds. Use this information to write a variation equation then use it to find the weight of a female whose height is 5’3” if they have the same body type as the average female. Round answer to the nearest pound.

A.132 lb

B.125 lb

C.128 lb

D.114 lb

## AMU MATH 125 Test Week 2 Question 12

Under certain conditions, the pressure of gas varies inversely with its volume. If a gas with a volume of 125 cubic inches has 24 pounds of pressure, find the amount of pressure 120 cubic inches of gas is under.

A.24 lb

B.1/24 lb

C.25 lb

D.1/25 lb

## AMU MATH 125 Test Week 2 Question 13

The time to complete a project is inversely proportional to the number of people who are working on the project. A class project can be completed by 5 students in 36 days. In order to finish the project in 9 days, how many more students should the group add?

A.45 more students

B.40 more students

C.15 more students

D.20 more students

## AMU MATH 125 Test Week 2 Question 14

Which point is graphed below?

A.(4, –5)

B.(5, –4)

C.(–4, 5)

D.(–5, 4)

## AMU MATH 125 Test Week 2 Question 15

Find the slope of the line passing through the points (–2, –9) and (–5, –2).

A.7/3

B.- 7/3

C.3/7

D.- 3/7

## AMU MATH 125 Test Week 2 Question 16

Find the slope of the line passing through the points (8, 0) and (0, –7).

A.- 7/8

B.7/8

C.- 8/7

D.8/7

## AMU MATH 125 Test Week 2 Question 17

Find the coordinates of the x-intercept. x + 4y = 16

A.(16, 0)

B.(4, 0)

C.(0, 4)

D.(0, 16)

## AMU MATH 125 Test Week 2 Question 18

Write the equation in the slope-intercept form.

A.

B.

C.

D.

## AMU MATH 125 Test Week 2 Question 19

Find the y-intercept. –2x + 3y = –6

A.(–2, 0)

B.(3, 0)

C.(0, –2)

D.(0, 3)

## AMU MATH 125 Test Week 2 Question 20

Graph y = 4.

A. A1 (Each gridline represents 1 unit.)

B. A1 (Each gridline represents 1 unit.)

C. A1 (Each gridline represents 1 unit.)

D. A1 (Each gridline represents 1 unit.)

## AMU MATH 125 Test Week 2 Question 21

Find the slope. 3x – 7y = 26

A.3/7

B.-7/3

C.-3/7

D.-3/7

## AMU MATH 125 Test Week 2 Question 22

A newspaper advertisement costs \$7.50 per week to run the ad plus a setup charge of \$45.00. Find the cost of running the ad for 8 weeks.

A.\$360.00

B.\$105.00

C.\$60.00

D.\$420.00

## AMU MATH 125 Test Week 2 Question 23

The number of women who use a computer at work in Elbonia can be modeled by the equation y = 8,934x + 12,760, where x is the number of years from now. How many Elbonian women will be using a computer at work 10 years from now if this trend continues?

A.216,940 women

B.21,694 women

C.136,534 women

D.102,100 women

## AMU MATH 125 Test Week 2 Question 24

The homecoming committee is blowing up balloons for the big dance on Saturday. Thirty-five balloons have already been inflated, and now the next shift comes in and is able to blow up 70 balloons per hour. Assuming they continue at this rate, write a linear equation that describes the total number of balloons blown up in terms of hours and use the equation to find out how many hours it will take them to reach their goal of having 245 balloons.

A.y = 70x + 35; 3 hours

B.y = 35x + 70; 39 hours

C.y = 70x + 35; 17 hours

D.y = 35x + 70; 9 hours

## AMU MATH 125 Test Week 2 Question 25

Solve by graphing.

A.(1, –4)

B.(–1, –4)

C.(–1, 4)

D.(1, 4)

## AMU MATH 125 Test Week 2 Question 26

Solve the system by substitution.

A.(8, –10)

B.(–10, 8)

C.(10, –8)

D.(–8, 10)

## AMU MATH 125 Test Week 2 Question 27

A.(2, –3)

B.(–2, 3)

C.(–3, 2)

D.(3, –2)

## AMU MATH 125 Test Week 2 Question 28

Solve the following system:

What is the value of x?

A.–1

B.0

C.5

D.–2

## AMU MATH 125 Test Week 2 Question 29

Determine whether the system is consistent, inconsistent, or dependent.

A.Dependent

B.Consistent

C.Inconsistent

## AMU MATH 125 Test Week 2 Question 30

Angus invested \$11,000, part at 6% and part at 5%. If the total interest at the end of the year is \$570, how much did he invest at 6% ?

A.\$1,000

B.\$3,000

C.\$9,000

D.\$2,000