12) Solve the system of equations by the elimination method: {x+4y=132x+3y=6
13) Solve the system of equations by the substitution method: {2x−3y=−8y=−3x−1
Composites Involving Exponential Functions Find the domain and range for each of the functions in Exercis 21-24. 21. f(x)=2+ex1 22. g(t)=cos(e−t) 23. g(t)=1+3−t 24. f(x)=1−e2x3
Perform the elementary row operation −4R1+R3→R3 on the given matrix. Write numbers as integers or simplified fractions.
⎣⎡222333110671⎦⎤ Resulting matrix:
⎣⎡□□□□□□□□□□□□⎦⎤
The graph shows a function. Is the function even, odd, or neither? Use the drop-down menus to explain. Click the arrows to choose an answer from each menu.
For the function on the graph. opposite x-vatues have choose:values. This shows the function is choose because its graph has Choose..
Suppose that O partners equally share the profits from a sale of $3,600. Which algebraic expression represents this situation?
3600+03600−p
3600p
p3600
Factor the polynomial completely.
P(x)=x2+49P(x)=□□
Find all its zeros. State the multiplicity of each zero. (Order your answers from smallest to largest real, followed by complex answers ordered smallest to largest real part, then smallest to largest imaginary part.)
x=□ with multiplicity
x=□ with multiplicity □
Perform the elementary row operation 21R1→R1 on the given matrix. Write numbers as integers or simplifled fractions.
⎣⎡313255411411⎦⎤ Resulting matrix:
□□□□□□□□□□□□
Ben is saving money to buy an Xbox One S that costs $323 including tax. He opens a savings account with a deposit of $75 and deposits $55 each week after mowing lawns. What is the minimum number of weeks Ben will need to make deposits until he has enough money in his account to buy the Xbox? Ben will have enough money to pay for the Xbox after at least weeks. Question Help: Message instructor Post to forum
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In some South Asian weddings, the groom travels to the wedding on a white horse in a procession called a baraat. A farm charges $1,000 to rent a horse for a baraat, which includes transporting the horse up to 15 miles to the wedding. A $2.50 fee applies for each mile beyond the first 15. An employee represents the situation with the function C(m)=1,000+2.50m and determines that the total cost to rent a horse for a wedding 25 miles away is $1,062.50. Is the employee correct? Use the drop-down menus to explain. Click the arrows to choose an answer from each monu.
The function roprosonts the situation if m is tho
Chooso...
The
employeo should substitute
chooso... □ for m and determine that the cost to rent and transport tho horso is chooso...
- Tho omployoo Chooso... correct.
The student photo club at the college is planning on selling prints that it makes to raise money.
The profit P, in dollars, from selling x prints is given by the function:
P(x)=217x−2x2
a) Find the number of prints, to the nearest whole print, that need to be sold to maximize the profit.
You must sell □ prints to maximize the profit.
b) The maximum profit, to the nearest dollar, is $□ . (No dollar signs or comma's.)
6) [AC](12)A lab assistant sneaks into a grizzly bear's den during the winter months and hooks up a machine to monitor the bear's lung capacity in breathing. Luckily for the lab assistant, the bear is hibernating now. The lung capacity of the bear can be modelled by a sinusoidal function.
a) Explain why the breathing of a hibernating grizzly bear can be modeled by a periodic function.
b) Explain the meaning of the period in the context of this situation.
Your local pizza store sells medium pizzas for $7.69 each, and breadsticks for $3.49 per order.
For a party, you decide to order 5 pizzas and 3 orders of breadsticks. There is a $3 delivery fee, and a 9.4% sales tax will be added to the total, including the delivery fee. What will be the total bill after tax, rounded to the nearest cent?
$□
Suppose you have a budget of $143.97 to spend, and you order 14 pizzas. How many orders of breadsticks can you get, assuming the same delivery fee and sales tax? Round your answer to the nearest whole number.
orders of breadsticks Suppose you have a budget of $306.79 to spend, and you order 20 orders of breadsticks. How many pizzas can you get, assuming the same delivery fee and sales tax? Round your answer to the nearest whole number.
□ pizzas
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✓1
2
3
✓5✓6×7✓
11
12
13 Write a system of linear equations represented by the augmented matrix. Give your answer in standard form using the variables x and y. The equations in the system should be in the same order as the rows in the given augmented matrix.
[−5−476−65] System of Equations:
□=□
4
5
✓6
7
8
9
10
11
12
< 13
14
15
Español
16 The difference of two positive numbers is 7 and the difference of their squares is 147 . Find the numbers. If there is more than one pair, use the "or" button. Give the answer in simplest form. The pair(s) of numbers: □ and □□∵□
Anwendung: Die Flugbahn eines Papierfliegers wird durch folgende Funktionsgleichung beschrieben: f(x)=−0,005x2+0,1x+1,5
a) Aus welcher Höhe wird abgeworfen?
b) Wie weit geht der Wurf?
30 m
1,5
-
c) Wie hoch fliegt der Flieger maximal? 2 m
d) Fünf Meter hinter dem Abwurf steht eine 1,80 Hohe Mauer. Fliegt der Flieger über die Mauer? -
A motorcyclist being monitored by radar accelerates at a constant rate from 0mph(v(0)=0) to 50 mph in 18 sec . How far has the motorcycle traveled after 18 sec? (Hint: Convert seconds to hours.) After 18 sec , the motorcycle has traveled □ mi.
(Simplify your answer. Type an integer or a fraction.)
In Exercises 41-46, describe how to transform the graph of y=lnx into the graph of the given function. Sketch the graph by hand and support your sketch with a grapher. 41. f(x)=ln(x+3) 42. f(x)=ln(x)+2 43. f(x)=ln(−x)+3 44. f(x)=ln(−x)−2 45. f(x)=ln(2−x) 46. f(x)=ln(5−x)
Determine whether the points (−2,5),(8,0), and (7,21) are solutions to the given system.
x+2y=8y=−21x+4 Part 1 of 3 The point (−2,5) is □ a solution. Part: 1/3 Part 2 of 3 The point (8,0) (Choose one) ∇ a solution.
□
Use the properties of logarithms to expand the following expression.
log(3x46(x+5)2) Your answer should not have radicals or exponents.
You may assume that all variables are positive.
log(3x46(x+5)2)=□log
Español Monique and Tara each make an Ice-cream sundae. Monique gets 2 scoops of Cherry Ice-cream and 1 scoop of Mint Chocolate Chunk Ice-cream for a total of 84 g of fat. Tara has 1 scoop of Cherry and 2 scoops of Mint Chocolate Chunk for a total of 90 g of fat. How many grams of fat does 1 scoop of each type of ice cream have? Part 1 of 2 Cherry has □ g of fat. Part 2 of 2 Mint Chocolate Chunk has □ g of fat.
Simplify.
1) x+967x
A) 42x(x+9)
B) 42x(x+9)
C) 42xx+9
D) 7(x+9)6x Simplify and reduce to lowest terms.
2) m−23m−m−26
A) m−23
B) 0
C) m−23(m+2)
D) 3
3) 14x8+14x3
A) 1114x
B) 28x11
C) 1
D) 14x11 Find the least common multiple.
4) x2−9,x+3
A) x2−9
C) x3−27
B) (x−3)(x+3)2
D) (x+3)(x2−9) Write the expression in lowest terms.
5) y2+2y−35y2−2y−15
A) −y2+2y−35y2−2y−15
B) y+7y+3
C) 2y−7−2y−3
D) 2y−35−2y−15 Use the verbal description to evaluate the function as indicated.
6) Multiply the input by 4 and add 7 to obtain the output. Find f(1).
A) -3
B) 11
C) -11
D) 3 Determine whether f might be a linear function.
7) \begin{tabular}{c|c|c|c|c}
x & 1 & 2 & 3 & 4 \\
\hlinef(x) & 7 & 13 & 19 & 25
\end{tabular}
A) Yes
B) No
olve the equation.
8) ∣r−1∣=6
A) No solution
B) -7
C) 5,7
D) −5,7
Which equation can be used to represent "six added to twice the sum of a number and four is equal to one-half of the difference of three and the number"?
6+2(x+4)=21(x−3)6+2(x+4)=21(3−x)(6+2)(x+4)=21(3−x)
An ice cube is freezing in such a way that the side length s, in inches, is s(t)=21t+4, where t is in hours. The surface area of the ice cube is the function A(s)=6s2.
Part A: Write an equation that gives the volume at t hours after freezing begins. ( 2 points)
Part B: Find the surface area as a function of time, using composition, and determine its range. (4 points)
Part C: After how many hours will the surface area equal 294 square inches? Show all necessary calculations, and check for extraneous solutions. (4 points)
[晾. Write the equation of this line in slope-intercept form.
[3]. Write your answer using integers, proper fractions, and improper fractions in simplest form.
□
Solve the equation for x.
−2(5x−3)+8=−10x+14 Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. x=□ (Type an integer or a fraction. Simplify your answer.)
B. The solution is all real numbers.
C. There is no solution.
Answer two questions about Equations A and B :
A. 5x−2+x=x−4
B. 5x+x=x−4
1) How can we get Equation B from Equation A ? Choose 1 answer:
(A) Add/subtract a quantity to/from only one side B Add/subtract the same quantity to/from both sides
C Rewrite one side (or both) using the distributive property
(D) Rewrite one side (or both) by combining like terms
Solve the system using any method.
y=41x+5y=81x+4
The system has no solution, }.
The system has one solution.
The solution set is □ \}.
The system has infinitely many solutions.
The solution set is □x is any real number }.
Two pools are being filled with water. To start, the first pool contains 784 liters of water and the second pool is empty. Water is being added to the first pool at a rate of 18.25 liters per minute. Water is being added to the second pool at a rate of 42.75 liters per minute. After how many minutes will the two pools have the same amount of water?
□ minutes How much water will be in each pool when they have the same amount?
□ titers
Solve and graph the following inequality.
1−4x≥25 and 7x−4>10 Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The solution set is {x∣x⟩□ 3
B. The solution set is {x∣□≤x<□ 3
C. The solution set is {x∣x≥□ 3
D. The solution set is {x∣□<x≤□
E. The solution set is ∅. Graph the solution. Choose the correct answer below.
A. B.
c. D.
E. O F.
To solve radical equations, first isolate one of the radical terms if necessary. Is the radical term isolated?
Yes
No What is the next step? Choose the correct answer below.
A. Factor the radicand.
B. Take the square root of the left side.
C. Rewrite the equation using the principle of powers.
D. Isolate x on the left side of the equation. Use the principle of powers. The principle of powers states that for any natural number n, if an equation a=b is true, then □
Graph the equation and identify the y-intercept.
y=21x+1 Use the graphing tool on the right to graph the equation. Click to enlarge graph The y-intercept is
□
(Type an ordered pair.)
Question 3 of 10
What is the 7th term in the geometric sequence described by this explicit formula?
an=−3⋅(3)(n−1)
A. -2187
B. 2187
C. -6561
D. 6561
SUBMIT
The Warbler House Inn offers two plans for wedding parties. Under plan A, the inn charges $40 for each person in attendance. Under plan B, the inn charges $1600 plus $25 for each person in excess of the first 30 who attend For what size parties will plan B cost less? (Assume that more than 30 guests will attend.) Let p repressents the number of guests. Select the correct choice below and fill in the answer box to complete your choice.
(Round to the nearest whole number.)
A. The solution set is {p∣p ? □ 3.
B. The solution set is {p∣p≥□ 3.
C. The solution set is {p∣p⩽□ 3
D. The solution set is {p∣p<□ 3
Emma just moved into a new apartment and finds out she has two different options for internet.
- Company A charges $220 per month with a non-refundable $100 installation fee.
- Company B offers a comparable internet package and charges $150 per month with a non-refundable $200 installation fee.
a) Write an equation for the total cost to get the internet from Company A for t months.
y=
b) Which sentence below, BEST describes the meaning of the slope of the equation above. Select an answer
c) Which line on the graph below represents the cost to rent from Company A for t months? The □ Select an answer ✓ line represents the cost to get the internet from Company A for t months.
d) If Emma is planning on staying in the apartment for one semester of school ( 4 months), which internet plan should she choose. Which answer below best explains using a comparison?
Select an answer
e) If Emma is unsure how many months she needs to have internet, help her know under what conditions she should choose each of the plans.
Company A is always best, because it started out cheaper.
Company B is always best, becasue it costs less per month.
In order to make a decision, Emma should look at the break even point! Company A is best for the first month, and Company B is best after that.
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Use the principle of powers. The principle of powers states that for any natural number n, if an equation a=b is true, then an=bn is true. Use the principle of powers.
(4x−6)4=1□
5
Q.13) If f(x)=x+3secx and f−1(c)=0, then c=
A. 31
B. 0
C. 32
D. 41
cibtifantstius orsil
2=
Q.14) One of the following equations is symmetric about origin
A. y=xx+1
B. −x5+3x
C. y=x4−2x2+6
D. None
−2=−x5)3x−(x5
Q.15) One of the following functions is an even function
A. f(x)=5xsec4x
B.None
C. f(x)=2xcos5x
D. f(x)=3xsin2x
Q.16)The range of the function f(x)=4−x21 is
A. (0,2)
B. [0,2]
C. (21,∞)
D. [21,∞)
E.None
Q.17) Given that f(x)=x−31 and g(x)=x1 then the domain of the function f∘g is
A. R\{0,31}B.R\{0}
C. R\{31}
D. R\{0,3}
E.None
Q.18) (The greatest integer less than or equals x ) The range of f(x)=2[x] is
A. {0,61,62,63, B. R\{0,61,62,63f∣x∣
sec -
C. {0,62,64,66 D. (−∞,∞)
Q.19) If the domain of the function y=f(x) is [2,3) then the domain of g(x)=f(3−x) is
A. [2,3)
B. (0,1]
C. [0,1)
D. (2,3]
E.None
Q.20) Given that f(x)=sec−1x then f(2)=
A. sin21
B. cos21x
C. cos−1(21)
D. sin−1(21)
E.None
Q.21) Given that f(x)=x2 and g(x)={2x,x+3,x≥4 then (f∘g)(x)=f(x))
A. {4x2(x+1)2,x<4,x≥4
B. {4x2(x+1)2,x≤4,x>4
C. {4x2(x+1)2,x<16,x≥16
D. {4x2(x+1)2,x≤16,x>16
Q.22) The domain of the function f(x)=Ln(5−∣7x+3∣) is
A. [−78,72]
B. (−78,72)
C. R\[−78,72]
D. R\(−78,72)
Q.23) The domain of f(x)=cos−1(3x+1) is
−1,1−24−
ولا تعت:
Solve and graph the following inequality.
a+9≤−17 Select the correct choice below and fill in the answer box to complete your choice.
A. The solution is {a∣a<□ \}.
B. The solution is {a∣a≥□
C. The solution is {a∣a≤□}
D. The solution is {a∣a>□ 3 Which of the following is the graph of the solution?
A. B.
c. D.