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Tutors Answer Your Questions about Linear Algebra (FREE)
Question 161146: CAN SOMEONE PLEASE HELP ME WITH THIS PROBLEM:
Find the appropriate linear cost or revenue function.
An electrician charges a fee of $60 plus $45 per hour. Let C(x) be the cost in dollars of using the electrician for x hours. Find the linear cost function.: CAN SOMEONE PLEASE HELP ME WITH THIS PROBLEM:
Find the appropriate linear cost or revenue function.
An electrician charges a fee of $60 plus $45 per hour. Let C(x) be the cost in dollars of using the electrician for x hours. Find the linear cost function.
Click here to see answer by Alan3354(1181)  |
Question 167817: Solve each system by the addition method.
x + y = 7
X – y = 9
x – y = 12
2x + y = 3
2x – y = -5
3x + 2y = 3
3x + 4y = -5
5x + 6y = -7: Solve each system by the addition method.
x + y = 7
X – y = 9
x – y = 12
2x + y = 3
2x – y = -5
3x + 2y = 3
3x + 4y = -5
5x + 6y = -7
Click here to see answer by checkley77(3381) |
Question 167817: Solve each system by the addition method.
x + y = 7
X – y = 9
x – y = 12
2x + y = 3
2x – y = -5
3x + 2y = 3
3x + 4y = -5
5x + 6y = -7: Solve each system by the addition method.
x + y = 7
X – y = 9
x – y = 12
2x + y = 3
2x – y = -5
3x + 2y = 3
3x + 4y = -5
5x + 6y = -7
Click here to see answer by nerdybill(1040) |
Question 167433: find the lope, the slope point form, slope intercept form, and standard form of the equation through the points (-5,6)(3,10) for slope intercept and standard form: find the lope, the slope point form, slope intercept form, and standard form of the equation through the points (-5,6)(3,10) for slope intercept and standard form
Click here to see answer by jojo14344(814) |
Question 166922: Approximate to the nearest tenth, the real root of the equation f(x)=x^3-4=0: Approximate to the nearest tenth, the real root of the equation f(x)=x^3-4=0
Click here to see answer by checkley77(3381) |
Question 166885: Help! Please! I already submitted these, but didn't get any answers. Thanks!
2/v - (3/v+1) x (v^2-1/v+4)
4x/x^2-3x-10 - 1/x^2+5x+6
A step -by-step would really be appreciated as this was done before I transferred to the class I don't really get it.
: Help! Please! I already submitted these, but didn't get any answers. Thanks!
2/v - (3/v+1) x (v^2-1/v+4)
4x/x^2-3x-10 - 1/x^2+5x+6
A step -by-step would really be appreciated as this was done before I transferred to the class I don't really get it.
Click here to see answer by Alan3354(1181) |
Question 166855: write an equation, then find the requested value of the variable.
if B varies inversely as t+2 and B=12 when t=1, find B when t=4: write an equation, then find the requested value of the variable.
if B varies inversely as t+2 and B=12 when t=1, find B when t=4
Click here to see answer by jojo14344(814) |
Question 166513: For x²(a-b)+a²(b-x)+b²(x-a) show that (x-a) is a linear factor.
PLEASE HELP ME!!!!!!: For x²(a-b)+a²(b-x)+b²(x-a) show that (x-a) is a linear factor.
PLEASE HELP ME!!!!!!
Click here to see answer by ankor@dixie-net.com(4485) |
Question 166495: State the number of positive real zeros, negative real zeros, and imaginary zeros for g(x)=9x^3-7x^2+10x-4.
I must show my work. This is from a worksheet and I'm not sure how to do it.
Thanks: State the number of positive real zeros, negative real zeros, and imaginary zeros for g(x)=9x^3-7x^2+10x-4.
I must show my work. This is from a worksheet and I'm not sure how to do it.
Thanks
Click here to see answer by stanbon(18729) |
Question 166514: For x²(a-b)+a²(b-x)+b²(x-a) show that (x-a) is a linear factor.
PLEASE HELP ME!!!!!!: For x²(a-b)+a²(b-x)+b²(x-a) show that (x-a) is a linear factor.
PLEASE HELP ME!!!!!!
Click here to see answer by ptaylor(1326) |
Question 166514: For x²(a-b)+a²(b-x)+b²(x-a) show that (x-a) is a linear factor.
PLEASE HELP ME!!!!!!: For x²(a-b)+a²(b-x)+b²(x-a) show that (x-a) is a linear factor.
PLEASE HELP ME!!!!!!
Click here to see answer by Edwin McCravy(2034) |
Question 166496: I am lost on how to do to problems
1. f(x)=3x and g(x)=4x-3, find f[g(5)] and g[f(5)].
2. find the inverse of f(x)=7x-2.
Can you please help. I must show my work. These are from a worksheet. We have no textbook to use.
Thanks
: I am lost on how to do to problems
1. f(x)=3x and g(x)=4x-3, find f[g(5)] and g[f(5)].
2. find the inverse of f(x)=7x-2.
Can you please help. I must show my work. These are from a worksheet. We have no textbook to use.
Thanks
Click here to see answer by stanbon(18729) |
Question 166191: suppose f(x)=3x-4 and g(x)=x+3.. find each value..
6. f(2)
7.f(1/3)+g(-2)
8.f(1)/g(1): suppose f(x)=3x-4 and g(x)=x+3.. find each value..
6. f(2)
7.f(1/3)+g(-2)
8.f(1)/g(1)
Click here to see answer by Mathtut(320) |
Question 165427: Farmer Ted can grow cotton and corn on his 200 acres of land.Cotton needs 15 lbs of fertilizer and 15 lbs of pestisides per acre. Corn needs 20lbs of fertilizer and 5 lbs of pestisides per acre. Farmer Ted can afford 3000 lbs of fertilzer and 1500 lbs of pestisides, and is trying to figure out how many acres of each crop to plant this season.
a. Define you varibles for this situation.
b. Use these varibles to write a system of inequalities describing the constraints on fertilzer and pestisides.: Farmer Ted can grow cotton and corn on his 200 acres of land.Cotton needs 15 lbs of fertilizer and 15 lbs of pestisides per acre. Corn needs 20lbs of fertilizer and 5 lbs of pestisides per acre. Farmer Ted can afford 3000 lbs of fertilzer and 1500 lbs of pestisides, and is trying to figure out how many acres of each crop to plant this season.
a. Define you varibles for this situation.
b. Use these varibles to write a system of inequalities describing the constraints on fertilzer and pestisides.
Click here to see answer by ankor@dixie-net.com(4485) |
Question 165494: the problem:
Prove that (1,0,0,1) and (0,1,1,0) are linearly independent. I think they are dependent, am i missing something?: the problem:
Prove that (1,0,0,1) and (0,1,1,0) are linearly independent. I think they are dependent, am i missing something?
Click here to see answer by Fombitz(1740) |
Question 165259: solve each equation. indicate the LCD
6/(x^2+2) = 3/x
--------------------
LCD: x(x^2+2)
==================
Cheers,
Stan H.: solve each equation. indicate the LCD
6/(x^2+2) = 3/x
--------------------
LCD: x(x^2+2)
==================
Cheers,
Stan H.
Click here to see answer by stanbon(18729) |
Question 164817: I have to find the least expensive cost for a steel frame building which measures 600 cu. meters. The prices of horizontal beams are 20d and 30w, vertical beams are 50h. Thank you.: I have to find the least expensive cost for a steel frame building which measures 600 cu. meters. The prices of horizontal beams are 20d and 30w, vertical beams are 50h. Thank you.
Click here to see answer by Fombitz(1740) |
Question 164842: As a homework problem, I am to construct a steel building 600 cu meters in size. My goal is to do it at the cheapest cost.
Bldg: W X L X H = 600 cu meters
Beams: $20W + $30L + $50H = Total Cost
I believe I have 4 unknowns, but I don't know how to set up the problem. Any help would be appreciated. THANK YOU!: As a homework problem, I am to construct a steel building 600 cu meters in size. My goal is to do it at the cheapest cost.
Bldg: W X L X H = 600 cu meters
Beams: $20W + $30L + $50H = Total Cost
I believe I have 4 unknowns, but I don't know how to set up the problem. Any help would be appreciated. THANK YOU!
Click here to see answer by MRperkins(77) |
Question 164800: Please help me solve this equation:
x+2y+3z=6
y+2z=0
z=2
can you do this by substitution please.
thank you!>: Please help me solve this equation:
x+2y+3z=6
y+2z=0
z=2
can you do this by substitution please.
thank you!>
Click here to see answer by Mathtut(320) |
Question 164697This question is from textbook Algebra 2
: A tourist agency can sell up to 1200 travel packages for a football game. The package includes airfare, weekend accommodations, and the choice of two types of flights: a nonstop flight or a two-stop flight. The nonstop flight can carry up to 150 passengers, and the two-stop flight can carry up to 100 passengers. The agency can locate no more than 10 planes for the travel packages. Each package with a nonstop flight sells for $1200, and each package with a two-stop flight sells for $900. Assume that each plane will carry the maximum number of passengers.
a. Write a system of linear inequalities to represent the constraints.
b. Graph the feasible region.
c. Write the objective function that maximizes the revenue for the tourist agency.
d. Find the maximum revenue.
------------------------------------------------------------------------
I need help with parts a and c.This question is from textbook Algebra 2
: A tourist agency can sell up to 1200 travel packages for a football game. The package includes airfare, weekend accommodations, and the choice of two types of flights: a nonstop flight or a two-stop flight. The nonstop flight can carry up to 150 passengers, and the two-stop flight can carry up to 100 passengers. The agency can locate no more than 10 planes for the travel packages. Each package with a nonstop flight sells for $1200, and each package with a two-stop flight sells for $900. Assume that each plane will carry the maximum number of passengers.
a. Write a system of linear inequalities to represent the constraints.
b. Graph the feasible region.
c. Write the objective function that maximizes the revenue for the tourist agency.
d. Find the maximum revenue.
------------------------------------------------------------------------
I need help with parts a and c.
Click here to see answer by ankor@dixie-net.com(4485) |
Question 164302: Graph the linear system and estimate the solution. Then check the solution algebraically.
x+2y=9
-x+6y=-1
thanks in advance: Graph the linear system and estimate the solution. Then check the solution algebraically.
x+2y=9
-x+6y=-1
thanks in advance
Click here to see answer by Fombitz(1740) |
Question 164349: Given functions f(x)=3x-4, g(x)=2x^2-7, h(x)=square root of x+5
Find (f o g)(x)=
Find (h o f)(x)=
Evaluate (g o f)(-2)=
I really need this tonight - I've been out and missed this in class. Thank you very much for taking the time to help. I believe I know how to do this but am not real confident of my answers and really need to do well on this quiz. I will be working on the other problems I do know how to do.: Given functions f(x)=3x-4, g(x)=2x^2-7, h(x)=square root of x+5
Find (f o g)(x)=
Find (h o f)(x)=
Evaluate (g o f)(-2)=
I really need this tonight - I've been out and missed this in class. Thank you very much for taking the time to help. I believe I know how to do this but am not real confident of my answers and really need to do well on this quiz. I will be working on the other problems I do know how to do.
Click here to see answer by scott8148(2719) |
Question 163927: Please help me solve the following problem:
It costs $28.95 per day plus $0.15 per mile to rent a car. How much is charged for renting the car for one day and driving 220 miles?
: Please help me solve the following problem:
It costs $28.95 per day plus $0.15 per mile to rent a car. How much is charged for renting the car for one day and driving 220 miles?
Click here to see answer by stanbon(18729) |
Question 163928: Please help! I am trying to solve this question on my homework and do not know where to begin. Any assistance you can provide is greatly appreciated!!!
Write an equation for a function that has the shape of y=x^3 but is shifted right 4 units and up one unit.
: Please help! I am trying to solve this question on my homework and do not know where to begin. Any assistance you can provide is greatly appreciated!!!
Write an equation for a function that has the shape of y=x^3 but is shifted right 4 units and up one unit.
Click here to see answer by stanbon(18729) |
Question 163717: 3. The points (3, 9), (5, 13), (15, 33), (34, 71), (678, 1359), and (1234, 2471) all lie on line M.
The points (3, -9), (5, -11), (15, -21), (34, -40), (678, -684), and (1234, -1240) all lie on line N.
a. Form the equations of both the lines. Show your work.
b. What are the co-ordinates of the point of intersection of lines M and N?
c. Write the co-ordinates of the intersections of lines M and N with the x-axis.
d. Write the co-ordinates of the intersection of lines M and N with the y-axis.
: 3. The points (3, 9), (5, 13), (15, 33), (34, 71), (678, 1359), and (1234, 2471) all lie on line M.
The points (3, -9), (5, -11), (15, -21), (34, -40), (678, -684), and (1234, -1240) all lie on line N.
a. Form the equations of both the lines. Show your work.
b. What are the co-ordinates of the point of intersection of lines M and N?
c. Write the co-ordinates of the intersections of lines M and N with the x-axis.
d. Write the co-ordinates of the intersection of lines M and N with the y-axis.
Click here to see answer by checkley77(3381) |
Question 163703This question is from textbook algebra and trigonometry
: It costs Ave Electronics Company $1900 to manufacture to 10 VCRs and $2200 to manufacture 16 VCRs. At this rate, what would be the cost of manufacturing 25 VCRS?This question is from textbook algebra and trigonometry
: It costs Ave Electronics Company $1900 to manufacture to 10 VCRs and $2200 to manufacture 16 VCRs. At this rate, what would be the cost of manufacturing 25 VCRS?
Click here to see answer by checkley77(3381) |
Question 163534: this is a question on 3x3 systems
i need 3 seperate problems for this one question which is:
The sum of three numbers is 57. The second is 3 more than the first. The third is 6 more than the first. Find the numbers. I have no idea how to set this up. Please help. thank you.
: this is a question on 3x3 systems
i need 3 seperate problems for this one question which is:
The sum of three numbers is 57. The second is 3 more than the first. The third is 6 more than the first. Find the numbers. I have no idea how to set this up. Please help. thank you.
Click here to see answer by Fombitz(1740) |
Question 163356: How would you solve the following problem?:
A tourist agency can sell up to 1200 travel packages for a football game. The package includes airfare, weekend accomodations, and the choice of two types of flights: a nonstop flight or a two-step flight. The nonstop flight can carry up to 150 passengers and the two stop flight can carry up to 100 passengers. The agency can locate no more than 10 planes for the travel packages. Each package with a nonstop flight sells for $1200, each package with a two stop flight sells for $900. Assume that each plane will carry the maximum amount of passengers.
A. Write a system of linear equalities to represent the constraints.
B.Graph the feasible region.
C.Write an objective function that maximizes the revenue for the tourist agency, and find the maximum revenue for the given constraints.: How would you solve the following problem?:
A tourist agency can sell up to 1200 travel packages for a football game. The package includes airfare, weekend accomodations, and the choice of two types of flights: a nonstop flight or a two-step flight. The nonstop flight can carry up to 150 passengers and the two stop flight can carry up to 100 passengers. The agency can locate no more than 10 planes for the travel packages. Each package with a nonstop flight sells for $1200, each package with a two stop flight sells for $900. Assume that each plane will carry the maximum amount of passengers.
A. Write a system of linear equalities to represent the constraints.
B.Graph the feasible region.
C.Write an objective function that maximizes the revenue for the tourist agency, and find the maximum revenue for the given constraints.
Click here to see answer by ankor@dixie-net.com(4485) |
Question 163239: How would you find the maximum and minimum values, if they exist, of the objective function for the given constraints?:
P=5y+3x
Constraints:
x+y<6
x-y<4
x>0
y>0
Thank you!!!: How would you find the maximum and minimum values, if they exist, of the objective function for the given constraints?:
P=5y+3x
Constraints:
x+y<6
x-y<4
x>0
y>0
Thank you!!!
Click here to see answer by Fombitz(1740) |
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