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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 595890: Solve simultaneously I dont understand..\
y=x^2-4x-2
y=x-2
Click here to see answer by jim_thompson5910(28598)

Question 596010: I Factored these questions and here are my answers
1)15^3-60x
15x(x^2-4)
2)5x^3-2x^2+5x-2
x^2(5x-2) (5x-2)
(x^2+1)(5x-2)
3)3x^2+x-2
ac=3(-2)=-6 b=1
3x^2+3x-2x-2
3x(x+1)-2(x+1)
(3x-2)(x+1)

Simplify a)(x+y)(x^2-5y^4)
answer:(x^3-xy^4)+(x^2 -5y^5)

4)write the set {...,-3,-1,1,3,5,7,...}using set builder notation.
Click here to see answer by jim_thompson5910(28598)

Question 596016: Solve the following equations...this is what i did
1) 4x/x+2 + 3/x-2=4
when i set it up this is what i got
4x(x-2)+3(x+2)=4(x+2)(x-2)
2.)10b-50/b^2-b-20 divided by 15/6b+24
answer: i factored everything and flipped it over since it says to divide and i got
10(b-5)/(b+4)(b-5) X 6(b+4)/15
10(b-5)/15(b-5) where should the 6 go?
Click here to see answer by jim_thompson5910(28598)

Question 596026: Questions & answers
Transpose the formula to find s---->Question : a=2(ut-s)/t^2
I got s=l^2(2(ut-s)

Word__Problem
a)When five is taken from six times a certain number the result is fifteen.What is the number?
I GOT
LET X BE THE CERTAIN NUMBER
6X-5=15
6X=15+5
6X=20
X=20/6

b)Sidney paid a grocery bill of $3.90 with dimes and quarters.If there were 4 more dimes than quarters,how many coins of each kind did he have? Not sure how to attempt this?
Click here to see answer by jim_thompson5910(28598)

Question 595982: I thought I had the answer but I'm stuck. Can you solve this?
A rectangular lot whose perimeter is 320 ft is fenced along three sides. An expensive fencing along the lot's length costs $20 per foot and an inexpensive fencing along the two side widths costs only $8 per foot. The total cost of the fencing along the three sides comes to $2140. What are the lot's dimensions?
Click here to see answer by scott8148(6628)

Question 596059: How can this concept be extended to systems involving three variables and three equations as well as solving the following system of three equations and describing the methods you are using:

X + Y + Z = 6
2X – Y + 3Z = 8
3X – 2Y – Z = -17
Click here to see answer by Alan3354(30993)

Question 596082: Solve by elimination method:
3x-2y=20
and
2x+3y=-4
Click here to see answer by stanbon(57384)

Question 596080: x+y=9 and y=2x
Click here to see answer by math-vortex(472)

Question 596180: I need help solving for t please. A=7P+2Prt
Step by step would be appreciated!
thanks so much.
Click here to see answer by jim_thompson5910(28598)

Question 596177: After you move into your new unfurnished apartment, you call a furniture rental company. They have a sofa and a love seat combination. They will rent them to you for an initial fee of $79.80 and a monthly rental payment of $64.80. If you choose a “rent-to-own plan” you can keep the furniture after the 24th payment.
a) Write a formula that allows you to compute the total cost (Y) to you for the furniture rental after any number of payments ”x”.
b) Identify the variable, coefficient, and constant for your linear equation.

Click here to see answer by richwmiller(9143)

Question 596188: what is the solution set of the equation |3-2x|=5?
(1){-1,4} (2){1,-4} (3){-1} (4){4}
Click here to see answer by jim_thompson5910(28598)

Question 596554: Solve Linear Equation of f(x) = g(x)
Given:
f(x) = 2x + 5
g(x) = 5x/2

Click here to see answer by rapaljer(4667)

Question 596541: Using the Gauss-Jordan elimination method, solve the following linear system.
2x-3y-z=0
3x+2y+2z=2
x+5y+3z=2

Click here to see answer by AnlytcPhil(1277)

Question 596547: Solve System of Equation: Solve for x and y.
-2x + 3y = 6
x + 2y = -4

Click here to see answer by Alan3354(30993)

Question 596649: Solve Linear Equation of f(x) = g(x)
What is the value of x?
Given:
f(x) = -2x
g(x) = 5x - 4

Click here to see answer by racoon(5)

Question 596673: A rectangular lot whose perimeter is 320 ft is fenced along three sides. An expensive fencing along the lot's length costs $20 per foot and an inexpensive fencing along the two side widths costs only $8 per foot. The total cost of the fencing along the three sides comes to $5800. What are the lot's dimensions?
Click here to see answer by scott8148(6628)

Question 596862: use the method of substitution to solve the system of linear equations.
3x-y=4
7x-2y=12
Click here to see answer by Alan3354(30993)

Question 596843: y= x - 6
y= 2x - 8
y= x - 4
y= -2x + 5
y= 2x+8
y=8
x=y= -3
x - y = -1
4x+y= 3.4
x= 4y
1/2x = y-1
1/3x = y
4x=y=3.4
x= 4y
x= -1/4y + 5
3x + 2y = 0
3x = -y+10
2x + 3y = -12

Click here to see answer by Alan3354(30993)

Question 596864: use the elmination method to solve the system of equations.
a+8b=12
a+3b=2
is there a solution? if so, what is the ordered pair (?,?)
Click here to see answer by Alan3354(30993)

Question 597018: solve 2x+3y+12z=900
Click here to see answer by josmiceli(9697)

Question 597171: 6+2x = x-6
x= ?
Click here to see answer by stanbon(57384)

Question 597313: find a fraction whose value is 4/7 and whose denominator is 15 greater than its numerator.
if this is all i am asked, how do i know anything about a numerator or a denominator? how do I slove something like this. when you show me how, can you explain all the steps?
Click here to see answer by solver91311(16897)

Question 597325: Rosa has $3.10 in nickels and dimes. she has 10 less nickels than she has dimes. how many dimes and nickels does she have
Click here to see answer by solver91311(16897)

Question 597325: Rosa has $3.10 in nickels and dimes. she has 10 less nickels than she has dimes. how many dimes and nickels does she have
Click here to see answer by josmiceli(9697)

Question 597371: how do you come up with the answer to this equation x-y=5 and x=2y+1
Click here to see answer by solver91311(16897)

Question 597742: Write a system of equations and solve. The sum of the measures of the two smaller angles in a triangle is 2 degrees less than the measure of the largest angle. If the middle angle measures 40 degrees less than the largest, find the measures of the angles of the triangle.
I realize that my equations will have an x, y and z for the variable but trying to get those equations is what I am having difficulty with.
Click here to see answer by scott8148(6628)

Question 598345: Find the product of the equation below
( 6 x - 5) ( 6 x + 5)
Click here to see answer by jim_thompson5910(28598)

Question 598342: A galaxy far, far away is 100 light years across. If a light year is equal to 5,890,000,000,000 miles, how many miles across is this galaxy in scientific notation?
Click here to see answer by Edwin McCravy(8909)

Question 598346: Simplify the equation, assuming 3 is an exponent

(x + 1) 3
Click here to see answer by Alan3354(30993)

Question 598672: I'm trying to help my son but I need a little help also, anything would be appreciated, shown in a way I can understand Please.
Solve the system of two linear inequalities graphically.
2y is less than -5x-10
5y is equal to or greater than 4x + 20
step one# graph the first inequality: 2y is less than -5x -10

step two# graph the second inequality: 5y is equal to or greater than 4x + 20
step 3# indicate the region that satisfies both inequalities.

Click here to see answer by stanbon(57384)

Question 599146: Y=3/4x+2
Click here to see answer by jim_thompson5910(28598)

Question 600129: the sum of two numbers is 50. Two times the smaller number exceeds the larger number by 31. Find the numbers.
Click here to see answer by godsgirls(5)

Question 600354: 6x+8y+9+2x-y-11

Click here to see answer by jim_thompson5910(28598)

Question 601228: Simplify (3t^2-2t-4)+(t^2-7t+6)
Click here to see answer by jim_thompson5910(28598)

Question 601245: how do you solve for (7xyz)0(5x)?
Click here to see answer by jim_thompson5910(28598)

Question 601346: A 2 digit no is such that the product of its digits is 35. If 18 is added to the Number, the digits interchange their places. Find the Number.
Click here to see answer by flame8855(424)

Question 601366: USE METHOD OF SUBSTITUTION TO SOLVE SYSTEM OF LINEAR EQUATION
7X+5Y=7/6
Y=6X-1
Click here to see answer by lawdej(58)

Question 601438: Hi, I have another one: x y=3x-8 I have to find three ordered pairs that satisfy this equation using 1) x=0 2) x=1 3) x=2
Are these answers right? 1) y = -8 2) y = -5 3) y = -2 if these are wrong can you show me step by step how you got the answer.
Click here to see answer by Alan3354(30993)

Question 601458: use method of substitution to solve the system of linear equations.
7X+5Y=7/2
Y=2X-1
Click here to see answer by flame8855(424)

Question 601543: solve by the elimination method 0.05x +0.25y=44 0.15x +0.05y=48
Click here to see answer by stanbon(57384)

Question 601542: Using the elimination method how do i solve 6x-9y=25.5 7x-3x=-14
Click here to see answer by mananth(12270)

Question 601746: I need to get the solution to these equations using the substitution method:
-x+y=7 and -1/2-y=2
Click here to see answer by stanbon(57384)

Question 601777: I need to know how to solve these equations using substitution thanks:)
-x+y=7 and -1/2x-y=2
Click here to see answer by stanbon(57384)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845