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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 300356: What is the solution to the inequality shown in the problem?
-1 + b>_ 9
Click here to see answer by Fombitz(32388)

Question 301368: f(x) = |x| and g(x) = x - 1. How many solutions x satisfy f(x) = g(x)?
Click here to see answer by Fombitz(32388)

Question 301470: Given two points on the line, input the equation of the line in standard form Ax + By = C. Reduce all fractional answers to lowest terms.
(6, 1), (5, 4)

Click here to see answer by Alan3354(69443)

Question 301469: Given two points on the line, input the equation of the line in standard form Ax + By = C. Reduce all fractional answers to lowest terms.
(7, -3), (4, -8)

Click here to see answer by Alan3354(69443)

Question 302482: A cruise boat travels 48 miles downriver in 4 hours and returns to its starting point upriver in 12 hours. Find the speed of the river.
Click here to see answer by Alan3354(69443)

Question 303178: use synthetic division to divide x^4+4x^3+6x^2+4x+1 by x+1
Click here to see answer by CharlesG2(834)

Question 303213: Please help to solve this equation:
6x+4y+z=40
Find out the value of x, y & z.

Click here to see answer by blwinbbbles(106)

Question 303311: write the interval notation for the set {x|-3>x>5}
Click here to see answer by Fombitz(32388)

Question 305981: solve the following formula for the indicated variable
A=1/2 (B+b)h
solve B
Click here to see answer by texttutoring(324)

Question 305989: solve the linear inequality
3z-1 > (or equal to) 3+5z
Click here to see answer by checkley77(12844)

Question 307041: The half-life of C-12 is about 3,700 years. How long will it be before a 2.35g sample of C-12 decays to 1.46g of C-12?
I have no clue...please help.
Thank You
Click here to see answer by scott8148(6628)

Question 307140: how does (n-3)^2 = n^2-6n+9 ????? please help
Click here to see answer by Stitch(470)

Question 307444: what can be said of points with equal abscissa? with equal ordinates?
Click here to see answer by rapaljer(4671)

Question 307453: what do points on the parallel to x-axis 5 units above it have in common?
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Question 307615: A cable car is carrying passengers down a hill at a downgrade of 12%. if the passengers descend 1,250 feet, through what horizontal distanve have they travelled?
Click here to see answer by ankor@dixie-net.com(22740)

Question 307760: with a fixed cost of $4000, 20 items cost a total of $10,000, find a linear cost function
Click here to see answer by rapaljer(4671)

Question 308315: 21x+7<3x+16
Click here to see answer by checkley77(12844)

Question 308315: 21x+7<3x+16
Click here to see answer by flvsdaugustave2(1)

Question 308566: How many Pure acid must be mixed with 60 liters of a solution that is 65% acid to obtain a new solution that is 75% acid?
Click here to see answer by mananth(16946)

Question 308636: Name the set(s) of numbers to which 1.68 belongs.

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Question 308645: 2(5-3x)=1/16
Click here to see answer by Alan3354(69443)

Question 308646: e2x=4
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Question 308646: e2x=4
Click here to see answer by rapaljer(4671)

Question 308664: log3(x-1)+log3(x-7)=3
Click here to see answer by rapaljer(4671)

Question 309159: find the slope of the graph of this equation. -8y+7x=-40
Click here to see answer by texttutoring(324)

Question 309258: what graph will represent the function f(x)=3+logx?
Click here to see answer by Fombitz(32388)

Question 309378: Graph each system of constraints. Find all vertices. Evaluate the objective function at each vertex to find the maximum or minimum value.
1)x<3
y<7
x>0,y>0
maximum for p=2x+3y

2) 2x+y<30
x+y<20
x>0, y>0
minimum for c=x+4y

3. Jerome burns 4 cal/min walking and 10 cal/min running. He walks between 10 and 20 min each day and runs between 30 and 45 min each days. He never spends more than an hour running and walking together. How much time should he spend on each activity to maximize the number of calories he burns?
Click here to see answer by Fombitz(32388)

Question 309822:
Click here to see answer by checkley77(12844)

Question 310221: hi... my equation is 6x+9y=39 and the bottom one is -2x+2y=18 i need to find the method of the equation i hope you can help me with this problem thank you a lot...
Click here to see answer by ichudov(507)

Question 311991: y
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Question 312432: Solve |3x - 4| < 10
Click here to see answer by Edwin McCravy(20055)

Question 312361: how many solutions are there to the math problem y�= 4/3y=5/4. thank you
Click here to see answer by Fombitz(32388)

Question 313020: find the x and y intercept of the graph of the equation
y=(x-4)(x+2)

Click here to see answer by Alan3354(69443)

Question 313641: A 3 kg mass is hanging from the end of a string. If a horizontal force of 12N pulls the mass to the side
a) Find the tension in the string
b) Find the angle the string makes with the vertical
Click here to see answer by scott8148(6628)

Question 314395: given f(x)+5x=9, find:
a.) f(-2)
b.) f(B+4)
Click here to see answer by Jstrasner(112)

Question 314687: find the equation of the line through (1,5) perpendicular to 4x+3y=15. write answer in slope intercept form
Click here to see answer by solver91311(24713)

Question 314684: solve and write the answer in set builder notation or interval notation
2-x/3>4
Click here to see answer by Fombitz(32388)

Question 314996: x + 2y + 3z = 11

Click here to see answer by Alan3354(69443)

Question 315584: i know the answe i just cant figure out how to show my work into an equation and Show your work.

Joe got a promotion at work and a 15% raise. If Joe�s new salary is $48,000 a year, how much did Joe make before his raise?
ty
Click here to see answer by solver91311(24713)

Question 315682: How do you find out the answer of this question 5x+7x
and do you always have to do a check for your answer?
Click here to see answer by Fombitz(32388)

Question 315684: 5 years ago, some was 3 times as old as raju, 10 years leter some would be twice as old as raju, How old are they now?
Click here to see answer by texttutoring(324)

Question 315684: 5 years ago, some was 3 times as old as raju, 10 years leter some would be twice as old as raju, How old are they now?
Click here to see answer by shantysaggu007(3)

Question 316483: Solve equation by factoring.
x^2 + 4 = 0
Click here to see answer by Fombitz(32388)

Question 316477: what answer of graphs linear equations min two variables
Click here to see answer by Fombitz(32388)

Question 316701: How do you find an nth-degree polynomial function with real coefficients satisfying the given conditions? n=3; 1 and 5i are zeros; f (-1)=-104
Click here to see answer by solver91311(24713)

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