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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 262876: A certain two-digit number has a value that is 2 more than 6 times the sum of its digits. The tens digit is 1 more than the units digit. Find the number by using linear sytems.
Click here to see answer by ankor@dixie-net.com(15649)

Question 262861: 3x-4y=12 and x=2y-4
Click here to see answer by angphy(3)

Question 262923: 5x+4y=28
2x-3y=2
Click here to see answer by mananth(12270)

Question 263031: how do you solve 6(t-5=2)t+5
Click here to see answer by stanbon(57327)

Question 263031: how do you solve 6(t-5=2)t+5
Click here to see answer by richwmiller(9135)

Question 263031: how do you solve 6(t-5=2)t+5
Click here to see answer by georgiabh(4)

Question 262921: 2x-y=6
3x+4y=-2
Click here to see answer by checkley77(12569)

Question 263346: I am stumped on this question and I am not sure how to figure out the perimeter. If I knew that number I could solve the problem. Thanks for your help.
Consider a square and a regular hexagon (a six sided figure with sides of equal length). One side of the square is 7 feet longer than a side of the hexagon, and the two figures have the same perimeter. What are the lengths of the sides of each figure?
I set it up as x= hexagon
x+7= square
x+x+7=?
Click here to see answer by richwmiller(9135)

Question 263429: Determine whether the system is consistent, inconsistent, or dependent.
3x - 3y = -9
9x - 9y = -27
Determine whether the system is consistent, inconsistent, or dependent.
2x + 2y = 2
6x + 6y = 6
Click here to see answer by drk(1908)

Question 263479: How do you put this in point slope form? (-2,5) (9,-6)
Click here to see answer by richwmiller(9135)

Question 263478: How would you graph this? -x -y =3
Click here to see answer by richwmiller(9135)

Question 263478: How would you graph this? -x -y =3
Click here to see answer by checkley77(12569)

Question 263475: Can you help me find the point slope form of this equation? (6,2) and m= 1/2
Thanks!
Click here to see answer by checkley77(12569)

Question 263496: Can you help me convert this to point slope form or standard form? y-3=-2(x=3)
Thanks
Click here to see answer by stanbon(57327)

Question 263496: Can you help me convert this to point slope form or standard form? y-3=-2(x=3)
Thanks
Click here to see answer by oberobic(2304)

Question 263512: If a pharmacist wants to make 150 milliliters of a 20 percent alcohol solution, but only has a 30 percent alcohol solution and a 15 percent alcohol solution, how much of each solution should she mix together to get what she needs?
Could you please take me step by step?
Click here to see answer by oberobic(2304)

Question 263606: I need to graph on a plane. y>-1. Where do I begin?
Click here to see answer by stanbon(57327)

Question 263627: A hockey team determines that it needs at least 60 points for the season in order to make the playoffs. A win w is worth 2 points and a tie t is worth 1 point. Find and graph an inequality that describes the sisuation. Please help.
Click here to see answer by drk(1908)

Question 263824: A pen contains chickens and goat. There are a total of 40 heads and 130 feet. How many chicken and how many goat are in the pen?
I have the answer: 25 goat and 15 chicken, however, I do not know how to set up the equation. Please help
Click here to see answer by Greenfinch(383)

Question 264229: Hi there, I was wondering whether or not there is a method to solving this called a graphing method.
Click here to see answer by Alan3354(30993)

Question 264210: 3x - 2y = 11
x - y/2 = 4
how do i solve these equations using substation?

Click here to see answer by checkley77(12569)

Question 264208: x + 14y= 84
2x - 7y = -7
how do i solve these equations using substation?

Click here to see answer by checkley77(12569)

Question 264282: how do you solve the system by substitution?
3X+2Y=11
x=13-3y
Click here to see answer by Alan3354(30993)

Question 264295: y=2x
x+y=12 What is the answer in (x,y) form
y=1/3x+6
3y-x=24 What is the answer in (x,y) form
3x+2y=13
5x=2y+11 What is the answer in (x,y) form
6x-2y=6
x+2y=8 What is the answer in (x,y) form
Click here to see answer by JBarnum(2044)

Question 264309: I am working with systems of Linear Equations. Confused. can you show me step by step how to solve
-2x + y = 1 and 3x + y = 1
Click here to see answer by unlockmath(1599)

Question 264343: need help solving a problem
-4x-6y+15=0
Click here to see answer by JBarnum(2044)

Question 264372: x-2y=-1
-x+5y=4
Click here to see answer by Alan3354(30993)

Question 264432: how do i slove this system
3x+5y=-3
10y-2z=2
x=-z
Click here to see answer by Alan3354(30993)

Question 264538: solve:
3x-2y=12
2x+3y=-5
by the addition method

solve:
2x-1y=-5
3x-5y=-4
by substitution

show steps please.
Click here to see answer by jim_thompson5910(28593)

Question 264664: I need to learn how to do this problem? In need of some serious help
3x - 5y = 1
10y = 6x - 1
Click here to see answer by palanisamy(496)

Question 264665: I am needing some help with these math problems, I can't seem to grasp it.
x - y =4
2x + y = 5
Click here to see answer by palanisamy(496)

Question 264708: I can't figure out how to solve this word problem:
Flying to Kampala with a tailwind a plane averaged 158 km/h. On the return trip only averaged 112km/h while flying back into the same wind. Find the speed of the wind and the speed of the plane in still air.
Click here to see answer by Alan3354(30993)

Question 264663: Solve each System Of linear equations.
{y=2x-3}
{y-2x= -3}
we are solving Special systems.
Click here to see answer by Alan3354(30993)

Question 264711: solve by eilimination
1)3x+7y =48
5x-7y= -32
2)-2x+3y =25
-2x+6y=58
3)3x+8y = 81
5x+6y=-39
4)8x+13y=179
2x-13y=-69
Click here to see answer by Edwin McCravy(8908)

Question 264737: Please help!
2x - 4y = 8
x - 2y = 4
Click here to see answer by jim_thompson5910(28593)

Question 264736: Here is another problem that I am confused with. Some of the problems are one way and then they are changed around and that when I get lost.
y = 2x + 1
x + y = 4
Click here to see answer by jim_thompson5910(28593)

Question 264741: I don't have a clue how to work this one out. I worked it out but it was wrong on the quiz.

A concrete driveway has a perimeter of 280 feet. The length of the driveway is 20 feet more than 4 times its width. Find the length and width of the driveway by writing two equations with two varibles, and solving the equations by either the addition method or the substitution method.
Click here to see answer by josmiceli(9671)

Question 264851: 7x-4y=-3
2x+5y=8
Click here to see answer by mananth(12270)

Question 264985: Without graphing find the vertex

Click here to see answer by Edwin McCravy(8908)

Question 264984: Without graphing find the line of symmetry
f(x)=-(x+6)^2-8
Click here to see answer by Alan3354(30993)

Question 265117: what is 5x-2-x(1+2)=2(2+3)
Click here to see answer by Alan3354(30993)

Question 265117: what is 5x-2-x(1+2)=2(2+3)
Click here to see answer by JBarnum(2044)

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