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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 310994: Translate the problem into a pair of linear equations in two variables.
Jill is 11km away from Joe; both begin to walk toward each other at the same time Jill walks at 2.5km/hr. They meat in 2 hours how fast is Joe walking.
Click here to see answer by checkley77(12569)

Question 311078: Trains A & B are traveling in the same direction on parallel tracks. Tran A is traveling 80 miles per hour and Train B is traveling 90 miles per hour. Train A passes a station at 12:00am. If Train B passes the same station 12:40am, at what time will Train B catch up to Train A? When will Train B catch up with Train A? What is the time and if am or pm? Please help. Thank you.
Click here to see answer by mananth(12270)

Question 311172: A group of students go out for lunch. If two have hamburgers and five have hot dogs, the bill will be $8.00. If five have hamburgers and two have hot dogs, the bill will be $9.50. What is the price of a hamburger?
Click here to see answer by mananth(12270)

Question 311160: The larger of two numbers is one more than twice the smaller. The sum of the numbers is twenty less than three times the larger. Find the numbers.
Click here to see answer by mananth(12270)

Question 311180: Two records and three tapes cost $31. Three records and two tapes cost $29. Find the cost of each record and each tape.
Click here to see answer by checkley77(12569)

Question 311240: A ski chalet offers 2 weekend packages. One package provides 2 nights and 3 meals for $280. The other package provides 2 nights 5 meals for $320. Write and solve a system of equations to find the cost per night and meal. Using the variable n to define the number of nights and the variable m to define the number of meals, write the 2 equations that represent the 2 weekend packages that the ski chalet has to offer
Click here to see answer by OmniMaestra(21)

Question 311293: at a fair the admission is $1.50 for children and $4.00 for adults. one day 2,200 people enter the fair and $5,050 is collected. how many children and how many adults attended.
Click here to see answer by fractalier(2101)

Question 311333: I need help with this problem please. In 1990, the life expectancy of males in a certain country was 61.1 years. In 1996, it was 63.5 years. Let E represent the life expectancy in year t and let t represent the number of years since 1990. The linear function E(t) that fits the data is E(t)= ?t + ?(round to the nearest tenth). Then use the fuunction to predict the life expectancy of males in 2009. E(19)=? (round to the nearest tenth). Please help me with this. Thank you very much.
Click here to see answer by ankor@dixie-net.com(15649)

Question 311158: Use elimination to solve each system of equations.
x+y+3
2x-3y=16
Click here to see answer by ankor@dixie-net.com(15649)

Question 311434: 9x-9y=27
7y-3x=-11
Solve by the elimination method..
Solution?

Click here to see answer by scott8148(6628)

Question 311571: 4x-2/5y=-6 4x+3/5y=-1 solve the system by the addition method
Click here to see answer by checkley77(12569)

Question 311879: 3x-y=12 Find the slope
Click here to see answer by tutorcecilia(2152)

Question 311919: 2/3(8x-12)=7-3(x-3)
Please solve the equation.
Click here to see answer by mananth(12270)

Question 311921: solve for y
-6y+1/10
=7
Click here to see answer by rfer(12657)

Question 312097: A crayon in the shape of a cylinder surmounted by a conical tip has a total
length of 8 cm. and a diameter of 1 cm. The total volume is 5 cubic cm.
If x is the length of the cylinder and y is the height of the cone.
Find x and y.
I've been trying to solve this using the elimination method of a system
of linear equations in two variables.
Click here to see answer by Fombitz(13828)

Question 312119: solve y=-x+3
Click here to see answer by Fombitz(13828)

Question 312104: what is the answer to this equation using substitution 3x+6y=48,-5x+6y=32
Click here to see answer by Fombitz(13828)

Question 312398: 10x+12y+15z=315
12x+15y+19z=389
56x+69y+az=1797
Find a?
Click here to see answer by Fombitz(13828)

Question 312474: simplify the following expression:
3x^3 y^4 z^-2
--------------
6x^-1 y^3 z^-3
I don't get how to do it, I've tried everything, Please help
Click here to see answer by rapaljer(4667)

Question 312578: Solve this linear system. 2y=3x+2 (Give answer in ordered pair)
Solve this linear system. 3x-4y=8 (Give answer in ordered pair)
Click here to see answer by checkley77(12569)

Question 312660: what is 9-x-4x=11
Click here to see answer by rfer(12657)

Question 312702: Please help me solve this:
The length of a rectangle is 6 cm more than the width. The perimeter is 156 cm. Find the length of the rectangle.

Click here to see answer by Fombitz(13828)

Question 312682: Write an equation of the line containing the given point and parallel to the given line? (-8,5)4x=5y+3.
Click here to see answer by Fombitz(13828)

Question 312700: Classify the following system of equations:
3x + 5y = 6
10y = 6x + 3

Click here to see answer by Fombitz(13828)

Question 312762: how to learn scientific notation?
Click here to see answer by rapaljer(4667)

Question 312623: An earthquake has a duration of 0.3 seconds and a amplitude of 7,500 micrometers. Find the measure on the Richter scale.

R=log A over P
Click here to see answer by Fombitz(13828)

Question 312863: what is x and y? answered with systems of equations solving with substitution
-8x-7y=-12, -7x-6y=-11
Click here to see answer by checkley77(12569)

Question 313246: The area of a rectangle is 24 square centimeters and its side lengths are x centimeters and x + 2 centimenters.
a. find the side lengths of a rectangle. justify your answer
b. find the perimeter of the rectangle
Click here to see answer by checkley77(12569)

Question 313259: Hello I have a problem, but cant seem to find out what i am doing wrong. The equations are solutions to systems of linear equations in three variables.
2x+ y-3z=-12
3x-2y-z= 3
-x+5y+2z=-3
I know you have to work only two equations at a time. My teacher took the class through it step by step but i'm thinking im making a mistake on my adding or subtracting because i keep coming out with the wrong answer.
THanks
Kayla
Click here to see answer by Alan3354(30993)

Question 313451: i was wondering how you would do these following problems there not my homework there examples I took from the algbra textbook about systems of inequalities and graphing a linear inequality, graphing a system of inequalities.
1) y<=4x-1
2) -2x+3y<-6
3) 5x+3y>-6 and 2y+x<6
4) 2x-3y>=9 and -x-4y>=8
Click here to see answer by nyc_function(2733)

Question 313471: i really dont understand this lesson well. so my teacher gave me this problem to do on my own and i was wondering was this right:2x-3y=12,x-y=-5

-3y=-2x-12 -y=-x+5
y=2/3x+4 y=x+5
Click here to see answer by OmniMaestra(21)

Question 313568: slove the system of equations by graphing then classify the system.
y + -x -10
4x -3y+16
solve by the substitution method
9x-2y=-91
7x+73=y
solve by the sub method
2m+n=1
m-6n=7
Click here to see answer by solver91311(16877)

Question 313567: slove the system of equations by graphing then classify the system. x + y+10
x - y+ -2
#2 slove the system equation by graphing 6 x - y +39
6 x + 7y + -33
#3 5 u + v +0
5u + v + 10
is the system consistent/ inconsistent
independent/ dependent
Click here to see answer by solver91311(16877)

Question 313694: x+y=56 y=3x solve these using substitution, The number 56 equals the number of houses available for sale, and there are two different floor plans available (x&y)I am trying to determine how many of each type there is.
Click here to see answer by stanbon(57337)

Question 313708: If I have the ordered pairs of (2,54) &(54,2) How would I figure out where they would intersect. I know there is an equation for it but I can't remember hwo to get it started.
Click here to see answer by Alan3354(30993)

Question 313703: During a publicity campaign, a cycle shop gave away 5000 miniature cycles and bumper stickets. The cycles cost $0.21 each and the bumper stickers cost $0.14 each. The cycle stop spent $826 on the gifts. How many of each gift did they buy?
Click here to see answer by rfer(12657)

Question 313929: Hello,
I am trying to figure out how to find the solution for this equation.
2x-y+3z=1
-x+2y-z=-2
x+y+2z=-1
Can anybody help me solve this problem?
thanks
Click here to see answer by ankor@dixie-net.com(15649)

Question 313946: what is the y-intercept and vertex of y=x^2+2x?
Click here to see answer by checkley77(12569)

Question 313978: (2,7) x+8y=9
The equation of the line is y=
Click here to see answer by Alan3354(30993)

Question 313981: find the slope and y intercept of the line 3y+3x+2=11+3x
Click here to see answer by rapaljer(4667)

Question 313981: find the slope and y intercept of the line 3y+3x+2=11+3x
Click here to see answer by checkley77(12569)

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