Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 841011: Trying to find how to graph this equation 7x + 10y = 70 using any two points
Click here to see answer by ewatrrr(24785)

Question 841164: how did you do this problem 1.2
Click here to see answer by richard1234(7193)

Question 841247: what is the value of the objective function shown for the point(200,500)
C=5x+10y
Click here to see answer by grishma.kshatriya(27)

Question 837974: Solve the systems using substitution.
1) 3x - 11y = 16
x + y = 3
2) 4x - y = 4
x + 2y = 10
HELP I DONT KNOW WHAT IM DOING
Click here to see answer by grishma.kshatriya(27)

Question 841472: What is the y-intercept of this line? y+4=-4(x-2)
Click here to see answer by josgarithmetic(39617)

Question 841492: What is the x-intercept of the perpendicular line? y+4=-4(x-2)
Click here to see answer by mananth(16946)

Question 841477: What is the equation in standard form of a perpendicular line that passes through (5,1)?
y+4=-4(x-2)
Click here to see answer by josgarithmetic(39617)

Question 841544: What is the value of k with perpendicular equations 24x 4y=-5 and kx-3y=0

Click here to see answer by nanakwame(5)

Question 841654: Could you please help me solve this system of linear equations?
2x+3y-z = 0,
x-4y+5z = 0
Verify that x = 1, y=-1, z = -1 is a solution.
Click here to see answer by richwmiller(17219)

Question 841709: What is the y-intercept of this line? y+4=-4(x-2)
Click here to see answer by josgarithmetic(39617)

Question 841710: Soda pop: $2. Large chips: $3. You have: $15

If you have bought only soda pop, how many bottles could you purchase?

Let c= 0. Only p variable.
Click here to see answer by rfer(16322)

Question 841871: a 60% sulphuric acid solution will be mixed with a 90% sulphuric acid solution to produce 8 L of a 75% solution. how much of each is required
Click here to see answer by josgarithmetic(39617)

Question 842174: Solve 3x - y = 14 for x.
I thought it would be like using the elimination method it makes no sense without a second equation and I got y over 3
Click here to see answer by richwmiller(17219)

Question 842193: Hi, my name is Grace Rogers and I am having trouble finding the symmetries of
y = cuberoot of x
How do I know if its symmetrical??
your help is greatly appreciated!
Click here to see answer by Theo(13342)

Question 842198: Hi, my name is Grace and I don't understand symmetries very well.
is y = 3x / x^2+9
symmetrical to any origin?
thanks for the help!
Click here to see answer by ewatrrr(24785)

Question 841823: how do you slove y=-x+4 y=3x by substitution

Click here to see answer by Fombitz(32388)

Question 842379: 3(x-4)-4(x-3)=x+3-(x-2)
Click here to see answer by Narsinghchauhan8960103366(17)

Question 842440: Solve the following system of equations, using the elimination method:
x - 2y = -12
2x + 9y = 2
Click here to see answer by TheInstructor(29)

Question 842461: Please help with the below problem. Thank you in advance!
Solve the system of equations by finding the reduced row echelon form of the augmented matrix. Write the solutions for x and y in terms of z, where z can be any number.
x+3y+4z=10
-3x+7y+4z=2
x=
y=
Click here to see answer by Fombitz(32388)

Question 842463: Please help with the below problem. Thank you in advance!
Three species of bacteria will be kept in one test tube and will feed on three resources. Each member of the first species consumes 6 units of the first resource and 1 unit of the third. Each bacterium of the second type consumes 1 unit of the first resource and 3 units each of the second and third. Each bacterium of the third type consumes 3 units of the first resource and 9 each of the second and third. If the test tube is supplied daily with 27,000 units of the first resource, 9000 units of the second, and 13,000 units of the third, how many of each species can coexist in equilibrium in the test tube so that all of the supplied resources are consumed? Suppose that there are 0 bacteria of the third type.

Number of the first type: ______ bacteria.
Number of the second type: _____ bacteria.
Number of the third type: ______ bacteria.

Click here to see answer by Theo(13342)

Question 843445: The length of a rectangle is 8cm more than four times the width. If the perimeter of the rectangle is 56cm what are the dimensions?
Click here to see answer by TheInstructor(29)

Question 843432: X=2/5 y+1 how do you get this in y intercept form?
Click here to see answer by Cromlix(4381)

Question 843369: What is the equation in standard form of a perpendicular line that passes through (5,1)?
y+4=-4(x-2)

Click here to see answer by Fombitz(32388)

Question 843416: solve each system by elimination:
-20y+14x-48=0
4x-12y=-24
Click here to see answer by Fombitz(32388)

Question 843798: I need to find the intersection of two lines
4x+7y= 76
3x-9y= -57
I have tried multiplying them to cancel out X but I cannot find the correct number when solving for y. I got 30.4 but then when I plugged it in I got 72.2 for one and 34.2 for the other, they are supposed to be equal.
Click here to see answer by 1335(25)

Question 843816: Math each system with the solution at the right
Y=x+1
Y=2x-1
Click here to see answer by josgarithmetic(39617)

Question 843916: hi im currently doing a course called MAT1503
i am stuggling with completing matrixes please help me
i need help with inverse matix
Click here to see answer by Fombitz(32388)

Question 843961: Explain how you would solve the system by graphing.
-2x + 7y = -7;
4x - 14y = 14
(Hint: Work through the problem first!)
Along with each of your answers, show all of your math work AND explain your steps using COMPLETE sentences.
Click here to see answer by Fombitz(32388)

Question 843968: How to solve this equation: -95/14=4/7(3/2+2)-2(3/4n+27/7)
Click here to see answer by Fombitz(32388)

Question 844154: Find
f + g, f − g, f � g, and f/g for each function.
f(x)= 6/x ; g(x)= x/x-8
Click here to see answer by Fombitz(32388)

Question 844611: is it best to solve 11x + 17y = 94 and x + y = 7 with substitution, elimination, or graphing
Click here to see answer by richwmiller(17219)

Question 844619: y=-3x write an equation of a line that is perpendicular to y=-3x+5 and passes through 4,3
Click here to see answer by stanbon(75887)

Question 844794: which of the following is true about the system of of linear equations?
3x+15y=6
4x+20y=8
(a) there are an infinite number of solutions
(b) there are no solutions
(c) there is a unique solution
(d) all pairs of "x," "y" satisfy the system of equations
Click here to see answer by richard1234(7193)

Question 844906: For each ordered pair, determine whether it is a solution to the system of equations:?
For each ordered pair, determine whether it is a solution to the system of equations:
y=-2x-5
6x+3y=-15
(5,0),(2,7),(4,-13),(-3,1)
Click here to see answer by josgarithmetic(39617)

Question 845193: Can anyone solve this for me.
If 7x y = 23 and x 7y =47, then find the value of x-y?

Click here to see answer by Alan3354(69443)

Question 845193: Can anyone solve this for me.
If 7x y = 23 and x 7y =47, then find the value of x-y?

Click here to see answer by chidex(1)

Question 845448: 2^x*4^-y=2:3^-x*9^2y=3
Click here to see answer by ewatrrr(24785)

Question 845812: This is the question I need help on: At McDonald's four cheeseburgers and three medium fries have a total of 2290 calories. Six cheeseburgers and two medium fries have 2560 calories. How many calories does each item contain?
Click here to see answer by josgarithmetic(39617)

Question 845811: Solve 7(5-3b)+5b(7b+8)
Click here to see answer by jim_thompson5910(35256)

Question 845824: Need help solving ASAP! Use the substitution method to solve the system of equations.
4(x - 2) = 8(y - 1)
16y - 32 = 2x + 4
Click here to see answer by josgarithmetic(39617)

Question 845824: Need help solving ASAP! Use the substitution method to solve the system of equations.
4(x - 2) = 8(y - 1)
16y - 32 = 2x + 4
Click here to see answer by pmesler(52)

Question 846013: how do i solve -12/b =4

Click here to see answer by ewatrrr(24785)

Question 846040: you are selling tickets to a football game. students cost $4 and general admission tickets cost $7. you sell 213 tickets ad collect $1146. how many of each type of ticket did you sell?
Click here to see answer by ewatrrr(24785)

Question 846076: how do i figure out how to solve 3x-11+2x+11+2y=180?
Click here to see answer by Fombitz(32388)

Question 846357: Evaluate the function at each specified value of the independent variable and simplify. (If an answer is undefined, enter UNDEFINED.)

g(y) = 7 − 5y
(a)
g(0) =

(b)
g

7

5

=
(c)
g(s + 1) =

Click here to see answer by stanbon(75887)

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