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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 865761: 1/3y + 3 = 8- 1/6y
Click here to see answer by edjones(8007)

Question 865843: 48+32t-16t^2
Click here to see answer by lwsshak3(11628)

Question 865913: -4(n-1)-6n what does n equal? Another one is -6-7=4X+2-3X WHAT DOES X EQUAL?
Click here to see answer by Fombitz(32388)

Question 866065: -4(5p + 3) = -12 - 6p
Exactly how do I do this ?

Click here to see answer by lenny460(1073)

Question 866178: I have a math project coming up and I have to find the solution to 2 equations. I'm really confused because both of the equations begin with 7= and I can't find x. My equations are y=11.25x-80 and y=7.50x-50. Can you please solve it and give me the steps so I understand. Thanks
Click here to see answer by mananth(16946)

Question 866335: 4x + 3y = 12
y = 2x - 6

Click here to see answer by stanbon(75887)

Question 866335: 4x + 3y = 12
y = 2x - 6

Click here to see answer by Seutip(231)

Question 866337: IF ten is subtracted from twice an unknown number, the result is the same as if four times that number was diminished by 20. find the number.
Click here to see answer by Seutip(231)

Question 866797: What is the solution of the system? Solve using matrices.
{-3x+2y=10
{-4x+3y=2
Click here to see answer by Fombitz(32388)

Question 866804: Solve the system
{3x + y -4z = -30
{3x + 2y + 2z = -8
{5x + 5y + z = -26
Click here to see answer by ewatrrr(24785)

Question 866828: Solve the system(Addition method recommended)
2x^2-4y^2=-14
2x^2+3y^2=98
Click here to see answer by ewatrrr(24785)

Question 866827: Solve the system(Substitution method recommended)
x+y=32
y=x^2-4x+4
Click here to see answer by ewatrrr(24785)

Question 866981: suppose the roof is 27 ft above the street at its peak and only 32 ft from the street. how far is the run from the edge of the peak?
Click here to see answer by Alan3354(69443)

Question 867027: A total of $58,000 is invested in two municipal bonds that pay 4.25% and 7.25% simple interest. The investor wants an annual interest income of $3335 from the investments. What amount should be invested in the 4.25% bond?
Click here to see answer by mananth(16946)

Question 867099: Please help me! I am so confused on this, I have tried it several times but its just not clicking tonight.. The question is.

The area of a right triangle is 260 in^2
Find the length of its legs if one leg is 6 inches longer than the other. (Use the five step method and show ALL work for full credit.)

If you could please explain this when helping me with this problem so I can solve the other problems similar to this one on my own. Thank you!
Click here to see answer by josgarithmetic(39617)

Question 867177: y=3x-5; (4, -3) what is the equation of the line parrallel to the given line and passing through the givven point
Click here to see answer by ewatrrr(24785)

Question 866704: is 7x+15=25 a linear equation?
7x+15 = 25
-15 -15
7x = 10
7x/7= 10/7
x=1.42
Click here to see answer by Fombitz(32388)

Question 867217:
Flashlight batteries are sold at Batteries Are us in two-packs and four-packs. A Batteries Are Us clerk hangs six packages of them on each of twelve hooks. He hung 200 batteries in all. How many two-packs are in stock?
solve a system of equations
i'm confused with the 2-pack vs 4 pack scenario.
i need to show all work
please help!
Click here to see answer by stanbon(75887)

Question 867334: Three lines go through the point (3,4). The slopes of these lines are 4,0, and -2/3. Aneesh says the equations of these lines are y=4x + 4, y =4, and y = -2/3x +4. Is he correct?
Click here to see answer by Alan3354(69443)

Question 867344: If (x-2)(to the second power)= 25 and x is less than 0, what is the value of x.
Click here to see answer by mananth(16946)

Question 868036: The point (2, 1) is a solution to which of the following systems of equations?
a. 2x + y = 5 and −2x + y = 2
b. −2x − y = −5 and 2x − y = 2
c. −x + y = 3 and −3x + y = −5
d. x + y = 3 and 3x − y = 5
Click here to see answer by ewatrrr(24785)

Question 868061: Solve the system by the method of your choice.
(x)/((4)-(y)/(4)= -1
x+2y = -13
The solution set is ???
Please help as I can't figure it out how to do this. Thank you.
Click here to see answer by Fombitz(32388)

Question 867440: I need step by step solution to:
410+(3.77 * x/26) = 395 + (3.77 * x/29)
I know the answer is 1000
Click here to see answer by Fombitz(32388)

Question 868259: to isolate or solve for r in the equation SA=2pier^2=2pierh
*pie is the pie sign
Click here to see answer by Alan3354(69443)

Question 868260: It would be greatly appreciated if you would be able to help me with:
Solve the following quadratic-linear system of equations using the substitution method:
y=x^2 -2x +1
y=x+3
Thanks for the help!
Click here to see answer by josgarithmetic(39617)

Question 868369: 2 x to the second power - 1 = 19
Click here to see answer by rfer(16322)

Question 868384: {3x-y=2
{5x-2y=6
Click here to see answer by ewatrrr(24785)

Question 868584: Solve the System y=3 and x=2
Click here to see answer by ewatrrr(24785)

Question 868640: given A(18,9), B(6,27), and C(6,9), determine the coordinates of point D such that CD is parallel to AB and D is on the:
i)y-axis
ii)x-axis
Click here to see answer by richwmiller(17219)

Question 868707: Solve by graphing. (If the system is inconsistent, enter INCONSISTENT. If the system is dependent, enter DEPENDENT.)
2x − 4y = 8
y = 2
Click here to see answer by ewatrrr(24785)

Question 867874: A farmer, in the business of growing fodder for livestock, has 90 acres available for planting alfalfa and corn. The cost of seed per acre is $32 for alfalfa and $48 for corn. The total cost of labor will amount to $60 per acre for alfalfa and $30 per acre for corn. The expected revenue (before costs are subtracted) is $500 per acre from alfalfa and $700 per acre from corn. If the farmer does not wish to spend more than $3888 for seed and $4200 for labor, how many acres of each crop should be planted to obtain the maximum profit?
alfalfa acres
corn acres

Click here to see answer by Theo(13342)

Question 868778: X+3y=9
4x-2y=-6
Click here to see answer by Fombitz(32388)

Question 868644: write an equation for the line that passes through E(-3,-7) and F(2,10). Write the equation in slope-point form and in slope-intercept form
Click here to see answer by Fombitz(32388)

Question 869186: use the substitution method to solve the system of equations. Enter your answer as an ordered pair. y=3x+2 Y=x+12
Click here to see answer by ewatrrr(24785)

Question 869345: Solve the system of equations using matrices and row of operations.
x-y+z=-4
2x-3y+4z=-15
5x+y-2z=12
Click here to see answer by Edwin McCravy(20056)

Question 869345: Solve the system of equations using matrices and row of operations.
x-y+z=-4
2x-3y+4z=-15
5x+y-2z=12
Click here to see answer by richwmiller(17219)

Question 869520: y=-5x-26
4x+4y=-24
Click here to see answer by Fombitz(32388)

Question 869688: X=16-4y
3x+4y=8
Click here to see answer by mananth(16946)

Question 870151: Graph in rectangular coordinate system.
8x-48=0
Click here to see answer by Alan3354(69443)

Question 870521: What point satisfies both equations? Show your work.
y=x+1 and -6x+3y=-12
Click here to see answer by jim_thompson5910(35256)

Question 870548: 2x+2y=24
y-x=1
What does x and y equal please show steps.
Click here to see answer by josgarithmetic(39617)

Question 870877: Grace's average driving speed is 10 mph faster than Tom's. In the same length of time, it takes Grace to drive 280 miles, Tom only drives 230. What is Grace's average speed?
Click here to see answer by JulietG(1812)

Question 871098: find the two consecutive integers whose sum are 99
Click here to see answer by mananth(16946)

Question 871196: How can solve an equation when x, and y are squared?: x squared + y squared=25
x =y squared-5
Click here to see answer by Fombitz(32388)

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