Unit 2 Week 2 Mastery Check: (40 Points)
Note: You may use this website https://www.desmos.com/calculator to help you graph anything.
\#1: Graph log2x using x=2,4,8,16,32 (Count by 4's along the x-axis up to 32 and go by 1 's up to 5 on the y-axis) (5 Points)
A rectangular bird feeder costs $18.00. A cylindrical bird feeder costs $24.00. The expected cost to keep the rectangular bird feeder filled is $3.00 per week. The expected cost to keep the cylindrical bird feeder filled is $2.00 per week. The equation models the break-even point.
18+3x=24+2x What does x represent?
the total cost to fill the rectangular bird feeder the total cost to fill the cylindrical bird feeder after
the number of weeks the after any number of weeks any number of weeks bird feeders are filled Y
the number of bird feeders purchased each week
4 Find the following products:
a (2x2−3x+5)(3x−1)
b (4x2−x+2)(2x+5)
c (2x2+3x+2)(5−x)
d (x−2)2(2x+1)
e (x2−3x+2)(2x2+4x−1)
f (3x2−x+2)(5x2+2x−3)
g (x2−x+3)2
h (2x2+x−4)2(2x+5)3
) (x3+x2−2)2
Follow the seven step strategy to graph the following rational function.
f(x)=−x2−41 Find the vertical asymptote(s). Select the correct choice below and, if necessary, fill in the answer box to comple
A. The equation(s) of the vertical asymptote(s) is/are x=2,x=−2.
(Type an equation. Use a comma to separate answers as needed.)
B. There is no vertical asymptote. Find the horizontal asymptote(s). Select the correct choice below and, if necessary, fill in the answer box to comp
A. The equation(s) of the horizontal asymptote(s) is/are y=0.
(Type an equation. Use a comma to separate answers as needed.)
B. There is no horizontal asymptote. Plot points between and beyond each x-intercept and vertical asymptote. Find the value of the function at the giver
x
f(x)=−x2−41−7−4
0
4
7
□□□□□
(Simplify your answers.)
㸚, Solve for k.
11k2−5k=0
(xi. Write each solution as an integer, proper fraction, or improper fraction in simplest form. If there are multiple solutions, separate them with commas.
k=
Submit
15. In a football game, all of the home team's points are from 7 -point touchdowns and 3 -point field goals. The team scores six times. Write and solve a system of linear equations to find the numbers of touchdowns and field goals that the home team scores.
(Section 5.1, Section 5.2, and Section 5.3)
260
Chapter 5
Solving Systems of Linear Equations
11
B
I
U
A
Name: Exponential Growth/ Exponential Decay
Date: Period:
d. In how many days total will the video stop being a fan favorite? The typical student loan has an interest rate of approximately 5%. This means a $20,000 loan paid off over 10 years will end up costing you $28,900 The New Jersey Volleyball Association invited 64 teams to compete in a tournament. After each round, half of the teams were eliminated. Create an equation that represents the number of teams, t, that remained in the tournament after r rounds. I
The equation −7(w−3)=70 is solved in several steps below.
For each step, choose the reason that best justifies it.
\begin{tabular}{|c|l|}
\hline Step & Reason \\
\hline−7(w−3)=70 & Given equation \\
\hline−7−7(w−3)=−770 & "Choose one" \\
\hlinew−3=−10 & "Choose one" \\
\hlinew−3+3=−10+3 & \begin{tabular}{l}
Sddition Property of Equality \\
Subtraction Property of Equality \\
Multiplication Property of Equality \\
Division Property of Equality \\
Simplifying
\end{tabular} \\
\hline & \begin{tabular}{l}
Distributive Property
\end{tabular} \\
\hline
\end{tabular}
Express the following equations in logarithmic form:
(a) 52=25 is equivalent to the logarithmic equation:
□
(b) 10−3=0.001 is equivalent to the logarithmic equation:
□
The equation −7(w−3)=70 is solved in several steps below.
For each step, choose the reason that best justifies it.
\begin{tabular}{|c|l|}
\hline Step & Reason \\
\hline−7(w−3)=70 & Given equation \\
\hline−7−7(w−3)=−770 & "Choose one" \\
\hlinew−3=−10 & "Choose one" \\
\hlinew−3+3=−10+3 & "Choose one" \\
\hlinew=−7 & "Choose one" \\
\hline
\end{tabular}
ollow the seven step strategy to graph the following rational function.
f(x)=x2−12x2 What is the y-intercept? Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The y-intercept is 0 .
(Type an integer or a simplified fraction.)
B. There is no y-intercept. What is/are the x-intercept(s)? Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The x-intercept(s) is/are 0.
(Type an integer or a simplified fraction. Use a comma to separate answers as needed.)
B. There is no x-intercept. Find the vertical asymptote(s). Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The equation(s) of the vertical asymptote(s) is/are □ 7.
(Type an equation. Use a comma to separate answers as needed.)
B. There is no vertical asymptote.
ALGEBRA I-B-TORRES (LMS)
3-1: MathXL for School: Additional Practice (LMS graded)
DUE
Dec 2 - 11:59 pm
Part 1 of 2 Use set-builder notation to describe the domain and range of the function. Describe the domain of the function. If multiple correct answers are possible, use the narrowest possible answer. Select the correct choice below and, if necessary, fill in the answer box(es) within your choice.
A. {x∣x is an odd integer and □≤x≤□
B. {x∣x<□
C. {x∣x⟩□
D. {x∣x is an integer and □≤x≤□ \} Help me solve this
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Find two numbers a and b such that the following system of linear equations is consistent dependent.
{ax−5y=b−4x+3y=6 Note that the ALEKS graphing calculator may be helpful in checking your answer.
a=□b=
The partial graph of g(x)=f(x)1 is shown. The maximum point of g(x) is at (2,4) and the y-intercept of g(x) is 2 . Given that f(x) is a quadratic function, the equation of f(x), can be written in the form y=a(x−p)2+q. The value of a+p+q, to the nearest tenth, is .
(Record your answer in the numerical response box from left to right) □
Listen Identify the graph of h(x)=x+4. Determine when the function is positive, negative, increasing, or decreasing and describe the end behavior of the function. The function is □ over the interval and
over □
Consider the function
h(x)=−21x2−2x+2 What is the vertex of h ?
□
What is the equation of the line of symmetry of h ?
□h has a Select an answer
□ of
□
The x-intercept(s) of h is/are
□
The y-intercept of h is
□ Graph h(x) Clear All
Draw:
The population of deer in South Bend, Tennessee is being monitored for research purposes. There were 56 deer tagged initially in January 2023. Researchers found the deer growing at a monthly rate of 3.5%, which can be represented by the model: y=56e.035t. Following this trend, how many months did it take for the deer population to reach 103. Round up.
The population of a small town in central Florida has shown a linear decline in the years 1989-2001. In 1989 the population was 35900 people. In 2001 it was 26900 people.
A) Write a linear equation expressing the population of the town, P, as a function of t, the number of years since 1989.
Answer: □
B) If the town is still experiencing a linear decline, what will the population be in 2006? □
3. A large tank is partially filled with a solution. The tank has a faucet that allows solution to enter the tank rate of 1643 liters per minute. The tank also has a drain that allows solution to leave the tank at a rate 1954 liters per minute.
(a) What expression represents the change in volume of solution in the tank in 1 minute?
(b) What is the change in volume of the solution after 15 seconds? Show necessary work.
(c) What does the change in volume after 15 seconds mean in the real world? Answer in complet sentences.
Answer:
1. [-/1 Points]
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LARCALCPRECALC3 2.2.026.
ASK YOUR TEACHER
PRACTICE ANOTHER Describe the right-hand and left-hand behavior of the graph of the polynomial function. (Select all that apply.)
f(x)=3x5−9x+4.5
The graph rises to the right.
The graph falls to the right.
The graph rises to the left.
The graph falls to the left.
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3.
[-/1 Points]
DETAILS
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LARCALCPRECALC3 2.2.034.
ASK YOUR TEACHER Use a graphing utility to graph the functions f and g in the same viewing window. Zoom out sufficiently far to determine if the right-hand and left-hand behaviors of f and g appear identical.
f(x)=3x4−6x2,g(x)=3x4
Yes
No
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(1 point) The graph below is a vertical and/or horizontal shift of y=1/x (assume no reflections or compression/expansions have been applied).
(a) The graph's equation can be written in the form
f(x)=x+A1+B
for constants A and B. Based on the graph above, find the values for A and B.
A=□ and B=□
(b) Write your answers from part (a) as a single fraction.
f(x)=x+DMx+C
for constants M,C, and D. What are the values of M,C, and D ?
M=□C=□ , and D=□
Moneysaver's Bank offers a savings account that earns 5% interest per year, compounded continuously. If Michael deposits $2600, how much will he have in the account after seven years, assuming he makes no withdrawals? Do not round any intermediate computations, and round your answer to the nearest cent.
\【I\square$
Write the system of equations as an augmented matrix.
{4x−4y=−44−7x−y=−99□□
Reduce the matrix into reduced row echelon form.
□□□□
Determine the solution to the original system of equations.
(x,y)=□
The point (585,241) lies on the graph of a linear function that represents a proportional relationship.
Part A
Write an equation for this function. What is the slope?
Boyle's Law involves the pressure and volume of gas in a container. It can be represented by the formula P1V1=P2V2. When the formula is solved for P2, the result is
1) P1V1V2
2) P1V1V2
3) V2P1V1
4) V1P1V2
When solving for the value of x in the equation 4(x−1)+3=18, Aaron wrote the following lines on the boarc
[line 1]
4(x−1)+3=18
[line 2]
4(x−1)=15
[line 3]
4x−1=15
[line 4]
4x=16
[line 5]
x=4 Which property was used incorrectly when going from line 2 to line 3 ?
1) distributive
3) associative
2) commutative
4) multiplicative inverse
Suppose the amount of a certain radioactive substance in a sample decays from 5.20 mg to 1.90 mg over a period of 6.21 minutes. Calculate the half life of the substance. Round your answer to 2 significant digits.
□□×10
5.
[-/7 Points]
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LARCALCPRECALC3 2.2.044. Consider the following.
f(x)=x4−x3−56x2
(a) Find all the real zeros of the polynomial function.
x=□ (smallest value) x=□ (largest value) x=□
(b) Determine the multiplicity of each zero and the number of turning points of the graph of the function.
- Select-
- Select-
(smallest x-value)
- Select
(largest x-value) The number of turning points is □ -Select-- ✓
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- Student A drives a car and hits other causes a loss of \12,000−Theinsurancefeaturesareasfollwing.−1.Ifdriverhitsothersonpurpose,nopayment.−2.Otherwises,themaximumis\9,000
- 3. The customer should pay $1,200 from their own pocket.
- 4. The copayment rate is 16%.
- How much can A claim from insurance company?
Kala-needs $8346 for a future project. She can invest $6000 now at an annual rate of 3.4%, compounded quarterly. Assuming that no withdrawals are made, how long will it take for her to have enough money for her project? Do not round any intermediate computations, and round your answer to the nearest hundredth.
□
years
Find the solution of the exponential equation 13ex−19=12
The exact solution, in terms of the natural logarithm is: x=□
The approximate solution, accurate to 4 decimal places is: x=□
Indium-116 is radioactive and has a half life of 14.10 seconds. What percentage of a sample would be left after 48.7 seconds?
Round your answer to 2 significant digits. 形 %□×10
Write the system of equations as an augmented matrix.
⎩⎨⎧−3x+6y−6z=−54−2x+3y−7z=−106−7x−3y−7z=−272 Reduce the matrix into reduced row echelon form. Identify the solution to the original system of equations.
(x,y,z)=(4,−1,6)×
There is a pair of x and y values that make each equation true in this system of equations:
{5x+3y=84x+7y=34 Explain why the same pair of values also make 9x+10y=42 true.
1. You can write an equation to solve comparison problems. An equation is a number sentence that uses the equal sign ( = ) to show that two expressions have the same value. Phrases, such as times as many as or more than, can be used to compare quantities. Compare with Multiplication
There are 6toys and 3 times as many books. How many books, b, are there? Compare with Addition
There are 6 toys. There are 12 more books than toys. How many books are there?
b=3×6b=6+12b= books
b= books
Question 19 (1 point)
The height, h, in centimetres, of a piston moving up and down in an engine cylinder can be modelled by the function h(t)=18sin(50πt)+18, where t is the time, in seconds. What is the piston's minimum height?
a) -18 cm
b) 18 cm
c) 0 cm
d) 9 cm
Consider the following piecewise-defined function.
f(x)={7−x−4−3x+8−36+7 If x<−4 if x>−4 Step 3 of 3 : Evaluate this function at x=−6. Write the exact answer. Do not round. If the answer is undefined, write Und as your answer.
f(−6)=□
Find the inverse of the linear transformation
y1=4x1+8x2+17x3y2=5x1+9x2+17x3y3=x1+2x2+4x3x1=□y1+□y2+□y3x2=□y1+□y2+□y3x3=□y1+□y2+□y3.
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Show Examples Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage rate of increase or decrease.
y=28(1.01)x
Answer Attempt 2 out of 2
LARCALCPRECALC3 2.2.030. Describe the right-hand and left-hand behavior of the graph of the polynomial function. (Select all that apply.)
f(s)=−65(s3+7s2−9s+6)
The graph rises to the right.
The graph falls to the right.
The graph rises to the left.
The graph falls to the left.
Find the equation of the exponential function represented by the table below
\begin{tabular}{|c|c|}
\hlinex & y \\
\hline 0 & 5 \\
\hline 1 & 2.5 \\
\hline 2 & 1.25 \\
\hline 3 & 0.625 \\
\hline
\end{tabular} Answer Attempt 1 out of 2
CL 3-113. Two brothers, Martin and Horace, are in their backyard. Horace is taking down a brick wall on one side of the yard while Martin is building a brick wall on the other side. Martin lays 2 bricks every minute. Meanwhile, Horace takes down 3 bricks each minute from his wall. They both start working at the same time. It takes Horace 55 minutes to finish tearing down his wall.
a. How many bricks were originally in the wall that Horace started tearing down?
b. Represent this situation with equations, tables, and a graph.
c. When did the two walls have the same number of bricks?
Consider the following.
f(x)=x4−x3−56x2
(a) Find all the real zeros of the polynomial function.
x=−7x=0x=8x= (largest value)
- (largest value)
(b) Determine the multiplicity of each zero and the number of turning points of the graph of the fur
multiplicity 1∼
multiplicity 2✓
multiplicity 1∼
(smallest x-value)
(largest x-value)
Exponential and Logarithmic Functions
Finding the time in a word problem on compound interest Suppose that $2000 is placed in a savings account at an annual rate of 10.8%, compounded monthly. Assuming that no withdrawals are made, how long will it take for the account to grow to $3130 ? Do not round any intermediate computations, and round your answer to the nearest hundredth.
□
years
3. A table of selected values is given for a one-to-one function, g. What is g−1(1) ?
\begin{tabular}{c|cccccc}
x & -4 & -2 & 0 & 1 & 5 & 8 \\
\hlineg(x) & 10 & 8 & -3 & -1 & -4 & 1
\end{tabular}
Solve.
x=7 Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. x=□
(Simplify your answer. Type an integer or a fraction. Use a comma to separate answers as needed.)
B. The solution set is the empty set.
an wof find What is the
? 16. Stancha diganith Ste has 28 magness Sne amanges the magness impo 4 equal couss wite an equarion using a lener to = equesent the urkioum value to find how thand magness are in each rour.
One can convert temperature from Kelvin into Fahrenheit using the formula F=59(K−273)+32. What is the temperature in Kelvin corresponding to F degrees Fahrenheit?
A. 59(F−273)−32
B. 95(F−32)+273
C. 59(F−32)+273
D. 95(F−32)−273
Tell which property of equality was used.
5353×61=w318=(w318)×61 Choose the correct answer below.
Multiplication Property of Equality
Subtraction Property of Equality
Addition Property of Equality
Division Property of Equality
Calculating equilibrium concentrations when the net reaction proceeds in reverse
Consider mixture C, which will cause the net reaction to proceed in reverse.
\begin{tabular}{lllll}
& & ← net & & \\
Concentration (M) & {[XY]} & ⇌ & {[X]} & {[Y]} \\
initial: & 0.200 & & 0.300 & 0.300 \\
change: ≶ & +x & & −x & −x \\
equilibrium: & 0.200+x & & 0.300−x & 0.300−x
\end{tabular} The change in concentration, x, is positive for the reactants because they are produced and negative for the products because they are consumed. Part C Based on a Kc value of 0.130 and the data table given, what are the equilibrium concentrations of XY,X, and Y , respectively?
Express the molar concentrations numerically.
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□□AΣϕ[XY],[X],[Y]= M
?
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Write inequalities to represent the situations below. To ride a roller coaster, a visitor must be taller than 52 inches. Use h to represent the height (in inches) of a visitor able to ride.
□ To get the 10% discount, a shopper must spend no less than $500.
Use d to represent the spending (in dollars) of a shopper who gets the discount.
□
Review
Constants
Pe MISSED THIS? Watch KCV 15.8, IWE 15.9; Read Section 15.8. You can click on the Review link to access the section in your eText. For the following reaction, Kc=255 at 1000 K . CO(g)+Cl2(g)⇌COCl2(g)
A reaction mixture initially contains a CO concentration of 0.1530 M and a Cl2 concentration of 0.172M at 1000 K . What is the equilibrium concentration of CO at 1000 K ?
Express your answer in molarity to three significant figures.
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□
Submit Part B What is the equilibrium concentration of Cl2 at 1000 K ?
Express your answer in molarity to three significant figures.
View Available Hint(s)
□
Submit
Review
Constants What is the equilibrium concentration of CO at 1000 K ?
Express your answer in molarity to three significant figures. MISSED THIS? Watch KCV 15.8, IWE 15.9; Read
Section 15.8. You can click on the Review link to access the section in your eText. For the following reaction, Kc=255 at 1000 K . CO(g)+Cl2(g)⇌COCl2(g)
A reaction mixture initially contains a CO concentration of 0.1530 M and a Cl2 concentration of 0.172 M at 1000 K .
Katherin deposits \$75,000 in a 3-year CD account that yields 3.5\% interest, compounded weekly. What is the amount of his interest, to the nearest cent, at the end of 3 years?
? Course Help
Problem Value: 1 point(s). Problem Score: 0\%. Attempts Remaining: 8 attempts.
(1 point) Consider the function
f(x)=6x−16x+3 Enter the equations of the vertical asymptotes. If there are no vertical asymptotes, enter none. If there is more than one vertical asymptote, enter a list of the equations separated by a comma (e.g., x=20,x=−7 ). Vertical asymptotes: □
Find the x-intercept(s). If there is more than one x-intercept give a list of the x-intercepts separated by commas (i.e.: (1,2),(3,4)). If there is no x-intercept type in none.
x-intercepts: □
Find the y-intercept: □
Find the domain of f(x) : □
Give your answer in interval notation.
Factor completely. Remember to look first for a common factor. Check by multiplying. If a polyno
−a6−4a5+96a4 Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. −a6−4a5+96a4=□
B. The polynomial is prime.