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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 35788: use substition method
x-4y=1
3x-5y=-4
Click here to see answer by Nate(3500)

Question 35877: college students spend $183 more each year on textbooks and course materials than on ccomputer equipment. They spend a total of $819 on textbooks and course materials and computer equpment each year. How much is spent each year on text books and course materials and how much is spent on computer equipment?
Click here to see answer by checkley71(8403)

Question 36902: Write a linear equation in two variables that is satisfied by (-3, 5). Are the equations independent or dependant?
Click here to see answer by venugopalramana(3286)

Question 37061: Solve by substitution -
5x - 2y = -5
y - 5x = 3
Click here to see answer by jcmtnez(53)

Question 37063: Solve by substitution -
4x - 12y = 5
-x + 3y = -1
Click here to see answer by checkley71(8403)

Question 37062: Solve by substitution -
8x - 4y = 16
y = 2x - 4

Click here to see answer by jcmtnez(53)

Question 37058: Find values for m and b in the following system so that the solution to the system is (-3, 4)
5x + 7y = b
mx + y = 22
Click here to see answer by jcmtnez(53)

Question 37159: Solve by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.

10x + 2y = 7
Y = -5x + 3
Click here to see answer by fractalier(6550)

Question 37149: Solve by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
2x + 3y = 1
5x + 3y = 16
Click here to see answer by checkley71(8403)

Question 37158: Solve each of the following systems by substitution.
8x � 4y = 16
Y = 2x � 4
Click here to see answer by fractalier(6550)

Question 37221: how can you interpret the solution of a system of equations by the corresponding graph?

Click here to see answer by jcmtnez(53)

Question 37347:
Eve has two more marbles than Solene. Solene has twice as many marbles as Steve. Steve has 7 less marbles than Eve. How many marbles do they have between them?

Click here to see answer by AnlytcPhil(1806)

Question 37636: 15-7x=8x-30
Click here to see answer by jessicaherndon(6)

Question 37638: -5(d+3)=7d+5 and 2/5(a+10)=1/4(a+20), these should help me with the rest of the problems. I am doing the problems so that I can check his work. Thanks.
Click here to see answer by josmiceli(19441)

Question 37694: Determine the intercepts for the linear rule, 4y - 7x= 28
Click here to see answer by checkley71(8403)

Question 37842: I would please like your help with this problem: 5x-3(2x-1)=5-3(-x+2)
Click here to see answer by fractalier(6550)

Question 37780: please help me solve this equation -(2x+9)-(6x-2)=7-(2x-10)
Click here to see answer by fractalier(6550)

Question 37911: This is a toughie, Can you help?
Water pressure (p) in the ocean is 2.3 tons per square inch at a depth (d) of 2 miles and 3.45 tons per square inch at a depth of 3 miles. How do you find the pressure at a depth of 4 miles?
I think you have to write a linear equation; this is what I did when I tried. Please help!
Click here to see answer by checkley71(8403)

Question 38001: Your teacher is giving you a test worth 100 points containing 40 questions. There are two-point and four-point questions on the test. How mamy of each type of question are on the test? please help me to sovle it. thank you.

Click here to see answer by checkley71(8403)

Question 38003: Please help me solve this problem.
The basal energy requirement B is the number of calories that a person needs to maintain the life process. For a 28-year old female with a height of 160 centimeters and a weight of 45 kilograms (kg), B is 1300 calories. If her weight increases to 50kg, then B is 1365 calories. There is a linear equation that expresses B in terms of her weight w. Find the equation and find the basal energy requirements if her weight is 53.2kg.
Click here to see answer by fractalier(6550)

Question 37938: What is the slope of the line with equation 4x+6y=24?
Click here to see answer by fractalier(6550)

Question 38006: Please help me solve this problem.
The basal energy requirement B is the number of calories that a person needs to maintain the life process. For a 28-year old female with a height of 160 centimeters and a weight of 45 kilograms (kg), B is 1300 calories. If her weight increases to 50kg, then B is 1365 calories. There is a linear equation that expresses B in terms of her weight w. Find the equation and find the basal energy requirements if her weight is 53.2kg.
Click here to see answer by fractalier(6550)

Question 38453: i dont get how to do this at all. i learned once, but ive forgotten & i forgot to bring home my book. the problem is what is the solution of the following system of linear equations?
y = 2x
4x - y = 10
can you please explain to me how to do this, so i can do it and the rest of them? :]
Click here to see answer by stanbon(75887)

Question 39063: |x|=10

Click here to see answer by simplice(1)

Question 38784: x/2 + y/4 = 1/7
x/4 + y/6 = 1/4
solve for x and y
I got x = 29/49 if this is correct please help me determine y.
thank you.
Click here to see answer by fractalier(6550)

Question 39334: solve for x and y in the following problem
18 x +y = 26, 6x -3y = 24
Click here to see answer by checkley71(8403)

Question 39330: Solve for x,y in the following system of three
x + 10y + z = 52
5x + y + 4z =15
x + 2y - 3z = 12
Click here to see answer by venugopalramana(3286)

Question 39414: Tell wether the systems of equations have only one ordered paias a solution or not. Also explain your answer by telling wether the graphs of the equations are parallel lines, intersecting lines, or the same lines.
2 x - y = 10
x + y = -1
Click here to see answer by fractalier(6550)

Question 39476: could you please help me with this problem .1x+2.3=.7x+.5
Click here to see answer by Nate(3500)

Question 39476: could you please help me with this problem .1x+2.3=.7x+.5
Click here to see answer by checkley71(8403)

Question 39511: solve the equation
6-17/z -3/z^2=0
Click here to see answer by fractalier(6550)

Question 39642: Teresa and Elaine are going on a camping trip. They will take 20 kg of dehydrated food with them. One type of food, Power Ration, costs $3/kg while another type of food, Energy Plus, costs $2/kg. They will spend $52 on dehydrated food.
(a) Write a linear system if equations to model this situation.
(b) Find the amount of each type of food that they will take on the camping trip. Solve by graphing
Click here to see answer by checkley71(8403)

Question 39698: I can't figure out how to solve this equation
6x-3y=1
-12x+6y=-2 I need to solve using a matrix but I can't figure out how to get the answer in the back of the book. It says the answer is (3y+1/6,y)
Click here to see answer by venugopalramana(3286)

Question 39768: Hi, I will take my final exam for algebra this week and I came across this problem while studying. I would greatly appreciate it if you could answer my question.
Riding a bus to and from work costs you $5.50 round trip. You are thinking about buying a used car for $2500. Gas and maintenance will cost you about $.50 per trip. How many trips to work will it take to break even?
I set up the equations y= 11/2x and y= 2500 + 1/2x. Are these equations right? What do I do from here?
Click here to see answer by checkley71(8403)

Question 39483: please help me with these problems:

6x+4=-3(X-3)
5/6x-3=x/3+4
11x-3(2x-7)=5x-3+2x
x/7-x/5=1/7
2(x-5)+3=15(x+2)-37

Click here to see answer by checkley71(8403)

Question 37212: A coffee merchant has coffee beans that sell for $9 per
pound and $12 per pound. The two types are to be mixed to create 100 lb of a mixture that will sell for $11.25 per pound. How much of each type of bean should be used in the mixture?
Click here to see answer by fractalier(6550)

Question 40120: y=10x^2 + x
5x+y=4
Click here to see answer by checkley71(8403)

Question 40118: 36x^2 + 16y^2=576
Click here to see answer by fractalier(6550)

Question 40426: What is the x-intercept of the graph of 4x + 3y = 12 ?
What is the y-intercept of the graph of 4x + 3y = 12 ?
Click here to see answer by AnlytcPhil(1806)

Question 40431: 5. Solve the system of equations using the addition (elimination) method.
If the answer is a unique solution, present it as an ordered pair: (x, y). If not, specify whether the answer is “no solution” or “infinitely many solutions.”
6x + 2y = 2
3x + 5y = 5

Click here to see answer by junior403(76)

Question 40341: CAN SOMEONE TEACH ME HOW TO DO LINEAR INEQUALITIES?
like - how do i find a boundry of a line?
ex. y>x y=____

Click here to see answer by Nate(3500)

Question 40498: y-(-4)-[y+(-4)]-4
Click here to see answer by checkley71(8403)

Question 40675: Which expression describes a Linear Function that always passes through (0,0).
A positive function B negative fuction
C inverse variation D direct variation
Click here to see answer by Nate(3500)

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