# Math125 Unit 2 quiz

Not all of these answers are right.  Please pay attention.

Unit 02 Quiz

// Simplify: 5(x + 2) – (x + 1)

 A.4x – 9 B.4x + 4 C.4x + 9 D.4x + 11

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 Part 2 of 25 – Unit 2 Q2 1.0/ 1.0 Points
// 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 $700 invested at 6% yearly for 3 years.  A.$11,340.00 B.$126.00 C.$113.40 D.$12,600 //  Part 3 of 25 – Unit 2 Q3 1.0/ 1.0 Points // The heat energy from electricity is given by the formula E=0.238I2 R t. Find E when I = 15 amps, R = 11 ohms, and t = 100 s. Round answer to the nearest hundredth.  A.58,905.00 B.3,927.00 C.53,014.50 D.64,795.50 //  Part 4 of 25 – Unit 2 Q5 1.0/ 1.0 Points // Solve: –3 + x = 7  A.{–4} B.{4} C.{–10} D.{10} //  Part 5 of 25 – U2 Q6 1.0/ 1.0 Points // Solve for x:  A. B. C. D. //  Part 6 of 25 – Unit 2 Q7 1.0/ 1.0 Points // Use the formula F = ma to solve. Find the acceleration for a force F = 810 newtons and a mass of 45 kg.  A.2025 m/s2 B.18 m/s2 C.324 m/s2 D.810 m/s2 //  Part 7 of 25 – Unit 2 Q8 1.0/ 1.0 Points // Steve earned scores of 78 and 99 on his first two exams. What will his average grade be if he gets a 93 on his third exam?  A.99 B.93 C.90 D.78 //  Part 8 of 25 – Unit 2 Q9 1.0/ 1.0 Points // A basketball team played 62 games and won 10 more games than it lost. Find the number of games the team won.  A.26 games B.16 games C.31 games D.36 games //  Part 9 of 25 – Unit 2 Q10 1.0/ 1.0 Points // A person sold their house for$170,000 and made a profit of 21%. How much did they pay for their home?

 A.$154,545.45 B.$205,700.00 C.$126,446.28 D.$140,495.87

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 Part 10 of 25 – Unit 2 Q12 1.0/ 1.0 Points
// Under certain conditions, the pressure of gas varies inversely with its volume. If a gas with a volume of 175 cubic inches has 23 pounds of pressure, find the amount of pressure 115 cubic inches of gas is under.

 A.1/35 lb B.23 lb C.1/23 lb D.35 lb

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 Part 11 of 25 – Unit 2 Q13 0.0/ 1.0 Points
// 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 28 days. In order to finish the project in 7 days, how many more students should the group add?

 A.30 more students B.15 more students C.20 more students D.35 more students

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 Part 12 of 25 – Unit 2 Q14 1.0/ 1.0 Points
// Which point is graphed below?

 A.(–4, 5) B.(–5, 4) C.(4, 3) D.(–4, –3)

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 Part 13 of 25 – Unit 2 Q15 1.0/ 1.0 Points
// Find the slope of the line passing through the points (–1, 9) and (5, 2).

 A.6/7 B.- 7/6 C.- 6/7 D.7/6

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 Part 14 of 25 – Unit 2 Q17 0.0/ 1.0 Points
// Find the coordinates of the x-intercept. –x – 4y = –4

 A.(4, 0) B.(0, 4) C.(0, 1) D.(1, 0)

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 Part 15 of 25 – Unit 2 Q18 1.0/ 1.0 Points
// Write the equation in slope-intercept form:

6x = y + 12

 A.y = -6x + 12 B. C.y = 6x – 12 D.

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 Part 16 of 25 – Unit 2 Q19 1.0/ 1.0 Points
// Find the y-intercept. –x – 3y = 9

 A.(0, –9) B.(–9, 0) C.(0, –3) D.(–3, 0)

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 Part 17 of 25 – Unit 2 Q20 1.0/ 1.0 Points
// Graph x = 3.

 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.)

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 Part 18 of 25 – Unit 2 Q21 1.0/ 1.0 Points
// Find the slope. –5x – 6y = –29

 A.-6/5 B.5/6 C.-5/6 D.6/5

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 Part 19 of 25 – Unit 2 Q22 1.0/ 1.0 Points
// A newspaper advertisement costs $5.50 per week to run the ad plus a setup charge of$45.00. Find the cost of running the ad for 6 weeks.

 A.$303.00 B.$270.00 C.$33.00 D.$78.00

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 Part 20 of 25 – Unit 2 Q23 1.0/ 1.0 Points
// The number of women who use a computer at work in Elbonia can be modeled by the equation y = 5,873x + 13,077, 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.18,950 women B.189,500 women C.71,807 women D.136,643 women

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 Part 21 of 25 – Unit 2 Q25 1.0/ 1.0 Points
// Solve by graphing.

 A.(–1, –2) B.(1, 2) C.(–1, 2) D.(1, –2)

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 Part 22 of 25 – Unit 2 Q26 0.0/ 1.0 Points
// Solve the system by substitution.

 A.(–1, 8) B.(1, –8) C.(8, –1) D.(–8, 1)

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 Part 23 of 25 – Unit 2 Q27 1.0/ 1.0 Points
// Solve the system by addition/subtraction.

 A.(8, –4) B.(–4, 8) C.(–8, 4) D.(4, –8)

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 Part 24 of 25 – Unit 2 Q28 1.0/ 1.0 Points
// Solve the following system:

What is the value of x?

 A.7 B.–7 C.6 D.5

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 Part 25 of 25 – Unit 2 Q30 1.0/ 1.0 Points
// Bob invested $13,000, part at 9% and part at 8%. If the total interest at the end of the year is$1,160, how much did he invest at 9% ?

 A.$1,000 B.$13,000 C.$12,000 D.$11,000

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