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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 285381: determine if the system has no solutions, one solutions, or many solutions.
2x+y=-8
-8x-4y=32

victoria_is_hawt@yahoo.com
Click here to see answer by user_dude2008(1862)

Question 285463: 3x + y = 12
y = 2x + 1
is this a linear equation?
Click here to see answer by edjones(8007)

Question 285544: Write a Systems of Equations for the sentence below:
"A rectangular parking lot has a perimeter of 310 meters. The length is 5 meters more than 4 times the width. What is the length and width?"
Thank you in advance.

Click here to see answer by checkley77(12844)

Question 285599: How would i put this into two equations.
1 gallon of milk cost $3 and a family of 4 buys 12 galoons a month. How much is being spent on milk for a month.
X= gallons of milk Y= amount spent per month
Click here to see answer by josmiceli(19441)

Question 285597: I need help to put this into two equations.
A family of 4 goes out to eat twice a month and each persons meal cost $30
How would i put that using X as number of people Y= total amount spent
Click here to see answer by Theo(13342)

Question 285973: y+4x=10
6x-y=20
Click here to see answer by richwmiller(17219)

Question 286048:
Click here to see answer by richwmiller(17219)

Question 286087: When the first equation is: y=5x-8 and the second equation is 5y=2x+6
how do you plug 5y=2x+6 into the first equation to solve?
thank you,
Wanda Mathis
Click here to see answer by richwmiller(17219)

Question 286099: Solve using substitution method
7x+2y=-30
x=42-8y
Click here to see answer by mgmoeab(37)

Question 286132: I do not know how to solve system equations using substitions with fractions. Do i multiply by a common denominator?
here is an example if you could solve it step by step for me:
7x-y=10
x=1/3y-2
i know the answer (4,18) but not how to get there. if you can help it would be greatly appreciated thank you.
Click here to see answer by ptaylor(2198)

Question 286110: y=5-4x
(5,_),(1,_),(-1,_)
Click here to see answer by user_dude2008(1862)

Question 286399: i need to find a linear function whose graph has a slope of -8 and y intercept (0,4)
Click here to see answer by checkley77(12844)

Question 286416: Solving in terms of one variable:
Solve each equation for x in terms of y
x-3y=-1
Click here to see answer by richwmiller(17219)

Question 286418: Solve using the
Substitution Method
3x+2y=13
x+y=5

Click here to see answer by jim_thompson5910(35256)

Question 286578: 2x+3y=13
y=x+1
in graphing method
Click here to see answer by nyc_function(2741)

Question 286847: Solve each system by the addition method. Determine whether the equations are independent, dependent, or inconsistent
4x +3y = 2
-12x � 9y = -6

Click here to see answer by richwmiller(17219)

Question 286998: please help me solve this equation.
3x+y=-3
2x+y=-1
Click here to see answer by richwmiller(17219)

Question 287249: a + b + c = 180
b = 3a c = 5a a=?
Click here to see answer by sharon1948(6)

Question 287579: Please help me solve the equation:
11-5(3-x)=-2(x+3)+6x
Click here to see answer by mananth(16946)

Question 287581: Solve each system of equations by graphing. Remember the form of the solution.
x+y=4
2x+y=5
Click here to see answer by richwmiller(17219)

Question 287580: Find the solution of the inequality:
-1 <= 4x-1/3 < 5
Click here to see answer by checkley77(12844)

Question 287780: Where do these 2 lines intersect?? -2x-2y=4 and 10x-4y=40
Click here to see answer by richwmiller(17219)

Question 287996: I have this quadratic equation and I can not figure it out; -0.2x squared + 12x + 11. I have to find the x and y coordinates. Help please.
Click here to see answer by richwmiller(17219)

Question 287946: If g(x) = √( x - 1), find all values of x for which g(x) = 6
I need help with this equation. Can someone explain the steps for solving it?
Thank you.
Carro
Click here to see answer by richwmiller(17219)

Question 288107: solve the systems by substitution x+2y=7
2x+2y=13
Click here to see answer by richwmiller(17219)

Question 288393: your brother starts out 10 minutes before you on a bike path and rides at a rate of 9mph. if you ride at a rate of 12mph, how long will it take you to catch up to him
Click here to see answer by richwmiller(17219)

Question 288398: the veterinary clinic charges $5 to immunize dogs and $3 to immunize cats. a total of 45 dogs and cats were immunized, and $195 in fees were collected. how many dogs were collected.
Click here to see answer by richwmiller(17219)

Question 288401: the length of a swimming pool is 12 feet longer than 1/2 its width. the perimeter of the pool is 60 feet. find the length of the pool?
Click here to see answer by checkley77(12844)

Question 288412: in one day, a store sold 8/5 as many dvds as cds. The total number of dvds and cds sold that day was 273. How many dvds where sold?
Click here to see answer by user_dude2008(1862)

Question 288416: in a basketball game, adam made 19 baskets, some 2-point shots and some 3-points shots, for a total of 40 point. how many 3-points baskets did he make
Click here to see answer by jaydducote(11)

Question 288394: natalie spent $135 on new shorts and tops. the shorts were 15% off and the tops were 20% off. if she saved a total of $24, how much did she spend on tops
Click here to see answer by richwmiller(17219)

Question 288423: mariana has $50 in her savings account and saves $3.00 each week. luis starts with no money in his savings account and saves $5.50 each week. after how many weeks will luis have more money saved than mariana
Click here to see answer by vleith(2983)

Question 288418: on a standardized test, correct answers are worth 2 points and incorrect answers are worth -1/4 point. alexandra wants to score at least 90 points on the test. if there are 50 questions on the test, what is the greatest number of questions she can miss
Click here to see answer by richwmiller(17219)

Question 288424: the morena family drove to yoesmite national park in 3 hours 24 minutes. on the way home, they averaged5 miles per hour less and the trip took 3 hours 42 min. how far from yosemite national park do they live?
Click here to see answer by richwmiller(17219)

Question 288427: U.S five cent coins are made from a combination of two metals.Nickel and copper. For every pound of nickel, 3 lbs of copper are used. How many pounds of copper would be needed to make 560 lbs of five cent coins?
Click here to see answer by richwmiller(17219)

Question 288434: juan made 2L of lemonade that consists of 40% pure lemon juice. how much water must he add to dilute it to 30% lemon juice
Click here to see answer by checkley77(12844)

Question 288451: The revenue (in millions of dollars) from the sale of x units at a home supply outlet is given by R(x)=0.18x. The profit (in millions of dollars) from the sale of x units is given by P(x)=0.083x-1.1. Find the cost equation. What is the break-even point.
9. Cost equation
10. Break-even point

I think it is a trick question - I don't think there is a break-even point!
Click here to see answer by richwmiller(17219)

Question 288460: This needs to have the five step deal D, V, P, E, S. Thanks
Lauren Morse, a mathematics textbook editor, works 7.5 hr day. She spent a resent day making telephone calls, writing e-mails, and attending meetings. She spent twice as much time attending meetings as making telephone calls and .5 hr longer writing e-mails than making telephone calls.How many hours did she spend on each task?
Click here to see answer by richwmiller(17219)

Question 288417: Solve by the elimination method.

3r-4s=14
4r+3s=27
Click here to see answer by ankor@dixie-net.com(22740)

Question 288461: adult tickets for the school concert cost $5 and student tickets cost $3.50. the school sold $2,162.50 worth of tickets. if 120 more students than adults attended the cocert, how many students attended the concert?
Click here to see answer by mananth(16946)

Question 288516: natalie spent $135 on new shorts and tops. the shorts were 15% off and the tops were 20% off. if she saved a total of $24, how much did she spend on tops?
Click here to see answer by oberobic(2304)

Question 288543: is (-11,45) a solution to the equation 3x+7y=-91? justify your answer
Click here to see answer by blwinbbbles(106)

Question 288829: 3x-2y=4
2x-y=5
Click here to see answer by brucewill(101)

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