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

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Question 362094: How to find all whole number solutions of each system using a table.

Also under the '<' in the 2nd equation, there is a line under it, symbolizing that it is an inequality.
Click here to see answer by HasanSahin(52)

Question 362314: For the following problem, the slope and one point on a line are given. Use the point-slope form to find the equation of the line. (Write your answers in slope-intercept form.)

(-8,-1), m = -1/4
Click here to see answer by rfer(12657)

Question 362309: Solve the following system of linear equations by graphing. If there is no solution, or if there is an infinite number of solutions, so state. Check your answer.
x + 2y = -4
x – y = -1

Click here to see answer by HasanSahin(52)

Question 362324: Solve the following system of linear equations by the elimination method. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.)
2x+2y= -1
4x+4y= 0
Click here to see answer by Fombitz(13828)

Question 362322: Solve the following systems by substitution. Substitute the expression in the second equation into the first equation and solve. (If the system has no solution, enter NONE for each answer.)
x-y= -4
y= 3x+6

Click here to see answer by robertb(4012)

Question 362329: 9a-2b=c+4a solve for a
Click here to see answer by mananth(12270)

Question 362122: Please help me write an equation in point-slope form of the line that passes through the given points (1/2,-1), (-2/3,6)...I always have trouble with fractions...thanks so much!
Click here to see answer by HasanSahin(52)

Question 362513: Use the given conditions to write an equation for the line in point slope form and general form. Passing through (2,-2)and perpendicular to the line whose equation is x-3y-5=0
Click here to see answer by Fombitz(13828)

Question 362619: Ms. Anthony wants to create a special blend using two coffees, one priced ar $8.40 per pound and the other at $7.28 per pound. How many pounds of the $7.28 coffee should she mix with 9 pounds of the $8.40 coffee to sell the mixture for $7.95 per pound?
Click here to see answer by checkley77(12569)

Question 362736: every website i have went to has told me to do this problem in point slope form...and i think that it's a different answer if it's in slope intercept form??
m=-1/2 b= 5
Click here to see answer by robertb(4012)

Question 362798: Please help me solve this equation: What is the slope of the collinear poinee
Click here to see answer by Manny Pacquiao(82)

Question 362902: i need to know how to solve it with steps and graph... the first inequality is greater than or equal to
2x+1>0
3y-6>0

Click here to see answer by HasanSahin(52)

Question 362982: Find the vertex and axis of symmetry of the graph of the function.
f(x) = x2 + 4x + 3
Click here to see answer by Fombitz(13828)

Question 362981: Solve the system of equations.
x-y+z=-8
x+y+z=-6
x+y-z=4
Click here to see answer by Fombitz(13828)

Question 362921: a rope measures 168 and is cut in three peices and the first peice is one-half bigger than the second peice and the third peice is three time the second peice
Click here to see answer by mananth(12270)

Question 363093: how do you solve this using substitution or elimination:
2x=-7+3y
3x-4y=-9
Click here to see answer by ewatrrr(10682)

Question 363252: y=3x-4

Click here to see answer by JBarnum(2044)

Question 363299: how do you solve x-4/7=7x-5/21??
Click here to see answer by rfer(12657)

Question 363366: I need help on knowing how to solve linear systems in form of fractions.
the problem: (1/x+2) + (2/y+1) = 1
(4/x+2) + (9/y+1) = 13/3
i attempted the first equation
i multiplied the left side by (x+2) (y+1) and the right side as well.
so i got y+1+2x+4=xy+x+2y+2
then i subtracted x and y from both sides
5+x=xy+y+2
to get
xy+y-x-3=o
I do not know if this is correct, so i can't go on solving the problem because i don't know. Truthfully, im guessing at this point.

Click here to see answer by user_dude2008(1861)

Question 363306: using the elimination method how would you solve this:
2x+3y=-7
x-4y=-9
Click here to see answer by user_dude2008(1861)

Question 363407: 10x-15y=45
8x-20y=-40
Click here to see answer by vasumathi(46)

Question 363598: John says to Brenda, "if you give me seven dollars, we will have an equal amount of money." Brenda responds, "that may be true, but if you give me seven dollars, i will have one dollar shy of having twice as much money as you." How much money did John and Brenda each have? (Show as much work as possible)
Hint: When one person gets $7 the other one loses $7.

Click here to see answer by checkley77(12569)

Question 363716: My question is How do you know when an equation has no solution?
Click here to see answer by robertb(4012)

Question 363782: 7 < 1-2x ≤ 10
solve this and show on real line

Click here to see answer by robertb(4012)

Question 363872: 3.What is the solution to the system y> -2x + 2 and y > -2x + 5?
Click here to see answer by ewatrrr(10682)

Question 363868: whats the values for the equation 4x+6y=96
Click here to see answer by Alan3354(30993)

Question 363982: x-y+z=6
x+y+z=2
x+y-z=0
Click here to see answer by Sphinx pinastri(17)

Question 363993: Solve by the substitution method.
7x-9y=2
4x+32=y
Click here to see answer by amoresroy(333)

Question 363994: 7x - 9y = 2
4x + 32 = y
Solve by the substitution method.
Click here to see answer by Alan3354(30993)

Question 364394: solve for b where b^4 +13b^2 + 36 = 0
Click here to see answer by mananth(12270)

Question 364439: The points (2, 5) and (4, –1) are endpoints of the diameter of a circle.
(a) State the center of the circle.
(b) Find the length of the radius of the circle. (Note that this is a distance.) Show work.
(c) State the equation of the circle (in standard form). Note that you know the center and the radius from the previous parts.

Click here to see answer by Fombitz(13828)

Question 364438: Kate wants to prepare a snack mix comprised of peanuts and dried fruit. Peanuts cost $7 a pound and dried fruit costs $5 a pound. Kate wants to spend exactly $45 and prepare 8 pounds of her snack mix. How many pounds of peanuts should Kate purchase, and how many pounds of dried fruit should Kate purchase? Show work.
Click here to see answer by mananth(12270)

Question 364436: Given x=
x+7
_______
x^(2)-9
determine the domain.
A. All real numbers except –3 and 3
B. All real numbers except –7 and 3
C. All real numbers except –7, –3, and 3
D. All real numbers except 0

Click here to see answer by Fombitz(13828)

Question 364435: Find the slope-intercept equation of the line parallel to the line 12x + 3y = 15 and containing the point (–1, 7). Explain and show work.
Click here to see answer by Fombitz(13828)

Question 364485: Alex has 95 cents in dimes and nickels. The total number of coins is 1 more than twice the number of dimes. How many coins of each type does Alex have?
I can not figure out the two equations.
I know that one is Dx + Ny = 95
Click here to see answer by Fombitz(13828)

Question 364477: what are the linear equations of
2x+3y=24
x+2y=14
and
x+y=8
x+2y=14
Click here to see answer by Alan3354(30993)

Question 364516: Let f(x) = 3x^4 – 1. Which of the following is true?
A. f(-x)=-f(x)
B. f(-x)= f (x)
C. f(-x)=1/f(x)
D. None of the above

Click here to see answer by nerdybill(6958)

Question 364533: how do i set up the problem :
Audrey has 32 dimes and quarters in her piggy bank with a total value of 6.50. How many of the coins are dimes and how many are quarters?
I need to write 2 equations and solve by addition method
Click here to see answer by ewatrrr(10682)

Question 364515: Suppose you take a piece of cardboard measuring 8 inches by 8 inches, cut out square corners with sides x inches long, and then fold up the cardboard to make an open box. Express the volume V of the box as a function of x.
Click here to see answer by Alan3354(30993)

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