Math125 Unit 2 quiz

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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

//

// 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

//

// 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

//

// Solve: –3 + x = 7

A.{–4}
B.{4}
C.{–10}
D.{10}

//

// Solve for x:

f$2y=3x+8f$

A.
\f$x=\frac{-2y-8}{3}\f$
B.
\f$x=\frac{2y+8}{3}\f$
C.
\f$x=\frac{-2y+8}{3}\f$
D.
\f$x=\frac{2y-8}{3}\f$

//

// 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/s<sup>2</sup>
B.18 m/s2
C.324 m/s2
D.810 m/s2

//

// 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

//

// 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

//

// 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

//

// 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

//

// 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

//

// Which point is graphed below?
Graph

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

//

// 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

//

// Find the coordinates of the x-intercept. –x – 4y = –4

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

//

// Write the equation in slope-intercept form:

6x = y + 12

A.y = -6x + 12
B.\f[y = \frac{1}{6}y + 12\f]
C.y = 6x – 12
D.\f[y = \frac{1}{6}y - 12\f]

//

// Find the y-intercept. –x – 3y = 9

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

//

// Graph x = 3.

A.graphA1 (Each gridline represents 1 unit.)
B.graphA1 (Each gridline represents 1 unit.)
C.graphA1 (Each gridline represents 1 unit.)
D.graphA1 (Each gridline represents 1 unit.)

//

// Find the slope. –5x – 6y = –29

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

//

// 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

//

// 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

//

// Solve by graphing.
Graph

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

//

// Solve the system by substitution.
system of equations

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

//

// Solve the system by addition/subtraction.
System of equations

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

//

// Solve the following system:
System of Equations

What is the value of x?

A.7
B.–7
C.6
D.5

//

// 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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