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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 1040255: x>0
y>0.
3x+2y>18
6x+7y<42
What is the value of 3x+3y
Thank you
Click here to see answer by ikleyn(52787)

Question 1040473: Solve using substitution method
2� +7y=9
5�-7y=11
Click here to see answer by josgarithmetic(39617)

Question 1040473: Solve using substitution method
2� +7y=9
5�-7y=11
Click here to see answer by MathTherapy(10552)

Question 1040658: please solve i have to find answer if its infinite or not
x+6y=-18
2x+7y=-21
Click here to see answer by Fombitz(32388)

Question 1040654: I`m having problems with systems of equations
x-3y=-26
-7x-4y=43

I`m supposed find if it infinite or none infinte
Click here to see answer by ikleyn(52787)

Question 1040759: what equation has a slope of 2- and passes through the point (3,7)?
Click here to see answer by josgarithmetic(39617)

Question 1040944: A number is as much less than 75 as it is greater by 75. Find the number
Click here to see answer by ankor@dixie-net.com(22740)

Question 1041214: What is the cost per handbag, if The cost of making 2 bags is $640, and the cost of making 5 bags is $700? Thanks!
Click here to see answer by Boreal(15235)

Question 1041214: What is the cost per handbag, if The cost of making 2 bags is $640, and the cost of making 5 bags is $700? Thanks!
Click here to see answer by MathTherapy(10552)

Question 1041322: 2x + 9y = 29
-5x + y = 45

Click here to see answer by josgarithmetic(39617)

Question 1041322: 2x + 9y = 29
-5x + y = 45

Click here to see answer by ikleyn(52787)

Question 1041646: x=-6+y
x-3y=28
Click here to see answer by Fombitz(32388)

Question 1041751: Can I please have your assistance? Solve the system: y = x2 + 5
6x - y = 3
Click here to see answer by josgarithmetic(39617)

Question 1041749: Can I please have your assistance? Solve the system: 2x + y = 5
x - y = 13
Click here to see answer by josgarithmetic(39617)

Question 1041840: Please help me solve this linear equation by factoring: 5x-[7-(2x-1)]=3(x-5)+4(x+3)
Click here to see answer by rfer(16322)

Question 1041750: Bobby is three years older than twice Arianna's age. If the total of their ages is 9, how old is Bobby, and how old is Arianna?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1041946: Elimination -2X-3y=5 -5X+3y=-40
Click here to see answer by Boreal(15235)

Question 1041988: Can someone help with this word problem?

Two planes, which are 2940 miles apart, fly toward each other. Their speeds differ by 35mph.
If they pass each other in 4 hours, what is the speed of each?
Click here to see answer by rothauserc(4718)

Question 1042337: Find the number whose fifth part increased by 5 is equal to its forth part diminished by 5.
Click here to see answer by chen.aavaz(62)

Question 1042529: How to solve 5x+10y=80
Click here to see answer by addingup(3677)

Question 1042567: Plz hlp me solve this question in a cls the ratio of boys and girls is 4:5.half of boys and half of girls participated in the youth festival.1/6 ie. 30 of the total student population participated in ncc camp. What is the no of girl student in the cls?
Click here to see answer by addingup(3677)

Question 1042631: A car is traveling at a constant velocity. After two hours the car has traveled 90 miles. After five hours the car has traveled 225 miles. Assuming a linear equation fits this situation, what are the ordered pairs that you would use to find the linear equation?
Which OF these are the answer (90,2)and(225,5) or (2,90)and(225,5) or (90.5)and(5,225) or (2,90)and(5,225)
Click here to see answer by josgarithmetic(39617)

Question 1042790: f(x,y)=3x+6y
Click here to see answer by Alan3354(69443)

Question 1042808: I Need help with solving an equation in two variables using elimination method. Here's the sum: 11x - 7y =xy , 9x - 4y = 6xy please.?
Click here to see answer by stanbon(75887)

Question 1042893: Solve the systems of equations simultaneously
4p+6q-r=0
2p+q+3r=4
p-2q+2r=10
Click here to see answer by Fombitz(32388)

Question 1042918: The eighth grade at Memorial Middle School is selling wrapping paper and gift bags to raise money for a field trip. They sold one-half as many rolls of wrapping paper as they did gift bags. The profit they make for each roll of wrapping paper is $2.50 and for each gift bag is $1.50. If the total profit was
$704, how many gift bags were sold?
Answer: 256 gift bags (How?)
Click here to see answer by ikleyn(52787)

Question 1043076: the length of a rectangle is 3 more than twice the breath of the rectangle.if length is reduced by 3 units and the breath is increased by 3 units, the area remains the same.find the dimensions of the original rectangle and also the area.
Click here to see answer by josgarithmetic(39617)

Question 1043075: the breath of a rectangle is 3 less than the length.if both length and breath are reduced by 3 units, the area of the rectangle reduces by 176sq.units. find the dimensions of the original rectangle.
Click here to see answer by josgarithmetic(39617)

Question 1043365: -x+2/9y=1 9x+3y=6
Click here to see answer by LinnW(1048)

Question 1043363: 2x-3y=16 -3x+2y=-19
Click here to see answer by LinnW(1048)

Question 1043364: -3x+y=2 -2x+3y=15
Click here to see answer by Alan3354(69443)

Question 1043364: -3x+y=2 -2x+3y=15
Click here to see answer by ikleyn(52787)

Question 1043605: Hello,

I am to use Cramers rule to solve the system:

x -z=4
6y-z=-19
2x+3y=1
Find the determinates:
D=
Dx=
Dy=
Dz=
I can't figure it out.
Thank you so much
Click here to see answer by Alan3354(69443)

Question 1043687: 10a + 4b = 28
6a + 18b = 48
Click here to see answer by Edwin McCravy(20056)

Question 1043684: 3a-4b=8
4a+3b=6
Click here to see answer by Alan3354(69443)

Question 1043778: 7�+14/3-17-3�/5=6�-4�+2/3-5

Click here to see answer by josgarithmetic(39617)

Question 1043846: Find the x- and y-intercept of the line.
-4x +2y = 24
Click here to see answer by Boreal(15235)

Question 1043871: A 350m barbed fenced around the rectangular field, the length is 5 times more than its breadth find the dimension of its breadth
Click here to see answer by ikleyn(52787)

Question 1043955: the following ordered pairs describe a linear relationship: (2,9) (5,10) (8,n) and (11,12). use the information to determine the missing value "n".
Click here to see answer by solver91311(24713)

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