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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 996896: Has an intercept of (0, 7) and a positive slope how to graph?
Click here to see answer by Fombitz(32388)

Question 997172: Hi
Really stuck on a problem here. If somone could help me out would be greatly appreciated
Find the solution of the following system of differential equations:
x'1 = x1 + x2
x'2 = x1 + x2
With the initial values
x1(0) = 1, x2(0) = 2
Click here to see answer by rothauserc(4718)

Question 997509: find the values of p for which (7p+1)x^2+(5p-1)x+p=1 has equal roots...
thank you
Click here to see answer by MathLover1(20849)

Question 997848: In each of the following systems of equations, look at the system and determine whether it has infinitely many solutions, no solution, or one solution. Explain in each case how you came to your conclusion. You should not attempt to solve any of the systems.
a) Let k represent a Real Number.
y = 2x + k
y = 2x � k
b) Let a represent a Real Number.
y = -2x + a
y = 12 x � a
Click here to see answer by ikleyn(52776)

Question 997851: F(x)=3xsquared-12 find f(x+h)
Click here to see answer by solver91311(24713)

Question 997949: Solve the systems of equations by substitution:
3x+y= -8
4x+3y=7
I have been working with different types of equations all night on homework and I'm not sure if I just don't understand it or if I'm doing something small wrong I just can't seem to get the correct answer.
Click here to see answer by MathLover1(20849)

Question 998091: Given the following independent system of equations
Ax + By = C
Dx + Ey = F
Where A, B, C, D, E, and F are non-zero Real Numbers. Find any values of A, B, C, D, E, and F that would give you a solution of (2, -1).

Click here to see answer by fractalier(6550)

Question 997846: Given the following independent system of equations
Ax + By = C Dx + Ey = F
where A, B, C, D, E, and F are non-zero Real Numbers. Find any values of A, B, C, D, E, and F that would give you a solution of (2, -1).

Click here to see answer by Fombitz(32388)

Question 999380: -3x+2y=6

Click here to see answer by fractalier(6550)

Question 999556: write an equation in slope intercept form of the line that passes through the given point and is perpendicular to the given line. Given: (-3,1); y=1/3x+2, (4,-3); 2x-7y=14

Click here to see answer by josgarithmetic(39616)

Question 999658: It takes 4 hoses 40 minutes to fill a 6000 gallon tank. How long would it take 5 hoses to fill a 3000 gallon tank?
Click here to see answer by ikleyn(52776)

Question 1000136: Write an equation in slope-intercept form with an x-intercept of 5 and a y-intercept of -1.
Click here to see answer by Boreal(15235)

Question 1000574: determine the number of solutions for the given system without solving the system.
3x-5y=-1
9x-15y=-3
Click here to see answer by josgarithmetic(39616)

Question 1000574: determine the number of solutions for the given system without solving the system.
3x-5y=-1
9x-15y=-3
Click here to see answer by MathTherapy(10551)

Question 1000677: the alloysean company has hired you to design a cylindrical can. You are given expressions for both the radius, 5-x centimeters, and the height, 2x+1 centimeters
Click here to see answer by ikleyn(52776)

Question 1000829: 30+5y is more thanor equal to 4x

Click here to see answer by fractalier(6550)

Question 1001002: I don't do algebra 2 can you please help me
Click here to see answer by Alan3354(69443)

Question 1001262: Find the slope-intercept form of the equation that passes through the given point and is perpendicular to the given line.
(-3,1) and y=-3x+7
Click here to see answer by MathLover1(20849)

Question 1001267: Find the slope-intercept form of the equation that passes through the given point and is perpendicular to the given line.
(6,-1) and 3y+x=3
Click here to see answer by fractalier(6550)

Question 1001272: Find the slope-intercept form of the equation that passes through the given point and is perpendicular to the given line.
(0,5) and y=-8x+4
Click here to see answer by fractalier(6550)

Question 1001420: Nicky has 120 feet of fence to put around a rectangular garden. if a 10 foot opening is left on one side for a gate. what would be the length and width for maximum area? L=20 ft w=20 ft
Click here to see answer by josgarithmetic(39616)

Question 1001468: If , when I find the value when , its which is, well you know.
But when I further simplify the function, I get , which has a value for , which is .
Is it a problem in maths or what?
Click here to see answer by Theo(13342)

Question 1001492: http://media261.acellus.com/Library/00001230_92_731_A1.png
copy and paste that to see the graph.
Can someone help me?
Click here to see answer by MathLover1(20849)

Question 1001484: http://media261.acellus.com/Library/00001230_92_731_A1.png
Can you help me?
Click here to see answer by Theo(13342)

Question 1001530: http://media261.acellus.com/Library/00001230_92_733_A1.png
Copy and paste to see the chart. Can you help?
Click here to see answer by Fombitz(32388)

Question 1001691: Write the slope intercept equation for a line passing through the given point that is parallel to the given line. (3, 5), 𝑦=27𝑥+1
Click here to see answer by josgarithmetic(39616)

Question 1001626: Please help me with this problem. I was never good with word problems. Please show all steps.
A man flies a small airplane from Fargo to Bismarck, North Dakota --- a distance of 180 miles. Because he is flying into a head wind, the trip takes him 2 hours. On the way back, the wind is still blowing at the same speed, so the return trip takes only 1 hour 12 minutes. What is his speed in still air, and how fast is the wind blowing?

Click here to see answer by Theo(13342)

Question 1001751: Write an equation in slope-intercept form of a linear function f(x) whose graph satisfies the given conditions.
The graph of f(x) passes through (-2, 6) and is perpendicular to the line whose equation is .

Click here to see answer by fractalier(6550)

Question 1001752: Write an equation in slope-intercept form of a linear function f(x) whose graph satisfies the given conditions.
The graph of f(x) passes through (-2, 6) and is perpendicular to the line whose equation is x=-4.
Click here to see answer by fractalier(6550)

Question 1002613: What is the slope-intercept form of the equations of the lines through the given points with the given slopes?
through (4, 2) slope: = -3/4
through (-2, -5) slope = 5/2

Click here to see answer by Cromlix(4381)

Question 1002615: How do I write the equation of a line through point ( 3, 6) that has an undefined slope?

Click here to see answer by Fombitz(32388)

Question 1002610: 3) Name the slope and y-intercept in the following equations:
a. y = 2x -5
b. 3x - 2y = 4
c. 3x + 5y = 7
May I have help with this problem?
Click here to see answer by Cromlix(4381)

Question 1002922: Emily made a sketch of a octagonal window on a 27 in squad piece of paper. First she cut 4 identical isosceles triangles from the corners of the paper. Then she cut a square from the center of the octagon. Each leg of the cut-off triangle is 1/3 the length of the paper. The side length of the cut-out square is also a 1/3 the length of the paper. What is the area of the sketch after she removed the triangles and the square?
I tried: area of original - area of cut outs
27*27 - 4(27) + 4(9)+
729 - 108 + 36=585
Wrong; the right answer is 486 square inches. How?
Click here to see answer by jim_thompson5910(35256)

Question 1003035: how do you solve for Y=-(x+1)^2+3 when y=9
Click here to see answer by MathLover1(20849)

Question 1003474: 15 year later Harry age will be thrice of his age 5year ago. Find Harrys present age
Click here to see answer by fractalier(6550)

Question 1003474: 15 year later Harry age will be thrice of his age 5year ago. Find Harrys present age
Click here to see answer by Boreal(15235)

Question 1003482: Adam had $17.10 with higher brought three apple of 1.50 each two mangoes of $1.35 each and the rest he spent on nine guava find the Coston 2 apple and 1 guava?
Click here to see answer by addingup(3677)

Question 1004672: i dont know which topic this is but here is the equation
through: (-3, -2), prep. to y=5x -1
Click here to see answer by rothauserc(4718)

Question 1004678:
Click here to see answer by ikleyn(52776)

Question 1004888: Put the equation in standard form with a positive x coefficient.
Y+1/4=-3(X+1/2)

Click here to see answer by Boreal(15235)

Question 1004896: Put the equation in standard form with a positive x coefficient.
Y-2=-2/5(X-8)
Click here to see answer by fractalier(6550)

Question 1004902: Find the slope-intercept form of the equation that passes through the given point and is perpendicular to the given line.
(-3,1) and y=-3x+7
Click here to see answer by fractalier(6550)

Question 1004970: Solve the system.
x-y+z=0
x+y+z=-2
x+y-z=8
Click here to see answer by Alan3354(69443)

Question 1004970: Solve the system.
x-y+z=0
x+y+z=-2
x+y-z=8
Click here to see answer by ikleyn(52776)

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