Questions on Algebra: Linear Algebra (NOT Linear Equations) answered by real tutors!

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Question 1094086: a car rental company charges 35 dollars a day plus 25 cents a mile to rent a car. what would be the cost to rent a car for 1 day and drive it 200 miles
Click here to see answer by ikleyn(52770)

Question 1094194: graph the problem f(x)=3x^2

Click here to see answer by josgarithmetic(39615)

Question 1094593: Prove that there exists a linear transformation T : R2 ! R3 such that T(1; 1) = (1; 0; 2) and
T(2; 3) = (1;-1; 4): What is T(8; 11)?
Click here to see answer by rothauserc(4718)

Question 1094594: Determine a value for x such that the following vectors are linearly independent (1; 1; 2; 1); (2; 1; 2; 3)
(1; 4; 2; 1); (-1; 3; 5; x)
Click here to see answer by rothauserc(4718)

Question 1094592: Determine whether the following sets are subspaces of R3: W1 = {f(x; y; z)R3 : x - 4y - z = 0};
W2 = {f(x; y; z)R3 : x + 2y - 3z = 1} and W3 = {f(x; y; z)R3 : 5x2 + 3y2 + 6z2 = 0}:
Click here to see answer by rothauserc(4718)

Question 1094700: let f(x)=2x-3
find each value
(fof-1)(5)
Click here to see answer by greenestamps(13198)

Question 1094700: let f(x)=2x-3
find each value
(fof-1)(5)
Click here to see answer by ikleyn(52770)

Question 1095174: Tickets for the concert were $3 for students and $5 for adults. There were 245 tickets sold and the money brought in on tickets sales was less than $1000. At most how many adult tickets were sold?
Click here to see answer by josgarithmetic(39615)

Question 1095430: A man leaves his home driving his car on a business trip. Twenty minutes later, his wife realizes he left his briefcase and decides to overtake him with another car. If the wife knows that her husband drives at an average of 45kph, how long (in hours) would it take her to overtake her husband?
Click here to see answer by ikleyn(52770)

Question 1095426: How many gallons of a 10% salt solution should be added to 20 gallons of a 60% salt solution to obtain a 50% salt solution?
Click here to see answer by ikleyn(52770)

Question 1095425: Working alone, Casper can finish a job in 6 hours. Requesting Alex to work with him, the two can finish the same job in 4 and 1/2 hours. How long would it take Alex to finish the same job alone?
Click here to see answer by josgarithmetic(39615)

Question 1095476: how to graph x+y=4 and 2x+y=8 on the same graph

Click here to see answer by ikleyn(52770)

Question 1095902: Two phone companies have a plan with the same monthly allowance on minutes, company A charges a monthly rate of $180 plus 75 cents per minute for each additional minute you go over the monthly allowance. Company B charges $230 plus 50 cents per minute for each additional minute you go over the monthly allowance. How many minutes would you have to go over in order for both bills to be the same amount?

Click here to see answer by jorel1380(3719)

Question 1096192: pls. help me to answer: a test is composed of 25 questions. the score of examinee is obtained by giving him 4 points for each correct answer. if an examinee answered all questions and obtained a score of 70. how many question did he answered correctly?
Click here to see answer by greenestamps(13198)

Question 1096190: pls help me to answer: if x:y=2:3 and x+y=20, find y.
Click here to see answer by josgarithmetic(39615)

Question 1096213: pls. help me to answer: Two similar triangles have perimeters 100 cm and 75 cm. if the area of the smaller triangle is 20 sq.cm. find the area of the larger triangle.
Click here to see answer by Theo(13342)

Question 1096412: solve system by elimimination
3x-5y=1
9x-y=-17
Click here to see answer by addingup(3677)

Question 1097668: Construct a truth table to determine when the lampbulb is on. That is,determine which switches must be open and which must be closed for the lightbulb to be on.

I was trying to paste the picture here but it's not working. To describe, there is a square with 3 openings, labeled p p and q. The directions are above. Thank you, hope you understand the requirements.
Click here to see answer by Alan3354(69443)

Question 1098031: pls help me to answer: if the sum of the cube of two numbers is 35 and their and their product is 216. what are the two numbers?
Click here to see answer by ikleyn(52770)

Question 1098033: pls help me to answer, if the sum of the square of two numbers is 35 and their product is 216. what are the two number?
Click here to see answer by ikleyn(52770)

Question 1098223: Good evening
Can somebody explain me step by step the evaluation process of following limit? I cannot reach the solution that should be = 1/4
Lim x--> +infinite; ((x^4 + x^3)^(1/4) -x)
Thank you very much and regards
Romolo
Click here to see answer by KMST(5328)

Question 1098459: B(2c+4) = D(8-c). Solve for C
Click here to see answer by josgarithmetic(39615)

Question 1098638: If its 40 degrees and 10 chirps are per minute and its 48 degrees and 20 chirps are per minute then predict the temperature when 30 chirps are per minute?
Click here to see answer by josgarithmetic(39615)

Question 1098710: A catapult is designed to launch extreme circus performers to ridiculous heights from a raised platform. After launch, the height of the performer in feet is given by h(t)=-16t^2+80t+32. Where t is seconds after the launch. After how many seconds is the performer 100 feet above the ground?
Click here to see answer by Boreal(15235)

Question 1098704: A dune buggy rental company charges $29.95 plus 16 cents per mile for each mile driven. The cost in dollars of renting a dune buggy, r, is a function of the number of miles, m. What is a function rule relating the cost to the number of miles?

Click here to see answer by ankor@dixie-net.com(22740)

Question 1098737: -4(n+8)
Click here to see answer by Alan3354(69443)

Question 1098781: Form a third-degree polynomial function with real coefficients such that negative 3 plus i−3+i and negative 3−3 are zeros.
Click here to see answer by josgarithmetic(39615)

Question 1098803: Form the third-degree polynomial function, f(x), with real coefficients such that 3i and 5 are zeros.
Click here to see answer by josgarithmetic(39615)

Question 1099276: which table of values represents a linear function ?
1. x 1,2,5,7
y 10,18,4,120
2 x 2,3,5,10
y 8,27,125,1000
3 x 0,2,9,11
y 0,4,81,121
4 x 1,3,7,8
y 4,10,22,25
Click here to see answer by Boreal(15235)

Question 1099475: Expand as the sum of individual logarithms, each of whose argument is linear. Simplify your answer.

-Accidentally submitted this question before I was done writing it, so that's why there's a second question like this one.
Click here to see answer by greenestamps(13198)

Question 1099473: Expand as the sum of individual logarithms, each of whose argument is linear. Simplify your answer.
Click here to see answer by Fombitz(32388)

Question 1099590: Suppose that the weight (in pounds) of an airplane is a linear function of the amount of fuel (in gallons) in its tank. When carrying
10
gallons of fuel, the airplane weighs
2158
pounds. When carrying
25
gallons of fuel, it weighs
2245
pounds. How much does the airplane weigh if it is carrying
35
gallons of fuel?
Click here to see answer by Alan3354(69443)

Question 1099658: By eating 1 egg, 1 cupcake, and 1 slice of pizza, a child consumes 301 mg of cholesterol. If
the child eats 3 cupcakes and 4 slices of pizza, he or she takes in 92 mg of cholesterol. By eating 2 eggs and 1 cupcake, a child consumes 566 mg of cholesterol. How much cholesterol is in each item?
Click here to see answer by richwmiller(17219)

Question 1100086: 1. Mary departs for school on a bicycle at an average rate of 6 miles per hour. Her sister Kate, running late, leaves 15 minutes later and cycles at twice that speed. How long will it take Kate to catch
Click here to see answer by ankor@dixie-net.com(22740)

Question 1100167: Make R the subject of --------S= D^2/ (D-R)^2
Click here to see answer by Theo(13342)

Question 1100165: Given 3x-5y+10=0, find the acute angle between the line and the y-axis, to the nearest degree.
Click here to see answer by Theo(13342)

Question 1100330: Solve the system by the addition method
X � 4 + y � 4 = 1
X � 5 - y � 5 = 12 � 5
Click here to see answer by richwmiller(17219)

Question 1100267: Can a linear function be continuous but not have a domain and range of all real numbers? Why?
Click here to see answer by Fombitz(32388)

Question 1100563: A stadium has 50,000 seats. Seats sell for $25 in section A, $20 in section B, $15 in section C. The number of seats in section A equals the total number of seats in sections B and C. Suppose the stadium takes in 1,074,500 from each sold-out event. How many seats does each section holds?
Click here to see answer by ikleyn(52770)

Question 1100872: Write the equation in slope intercept form of the line that passes through the point (-3,5) and has a slope of 2/3
Y =
Click here to see answer by josgarithmetic(39615)

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