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

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Question 820352: solve this system of equations 4a+7b=-30 8a+4c=-40 6b+4c=-20
Click here to see answer by TimothyLamb(4379)

Question 820233: I need to determine the x and y intercepts for X+(1/2y)=2
Click here to see answer by TimothyLamb(4379)

Question 820202: use substitution to solve this linear system
6x+y=-15
4x-5y=7
Click here to see answer by TimothyLamb(4379)

Question 820459: y+1=-9(x-7)
find the slope
Click here to see answer by ewatrrr(24785)

Question 820506: When using substitution to solve this system of equations,what is the result of the the first step?
Equations: y=6x+3
x+2y=5
Click here to see answer by ewatrrr(24785)

Question 820517: If substitution is the method used to solve this system of equations,what is the result of x?
Problems: x+y=3
2x-y=0
Click here to see answer by TimothyLamb(4379)

Question 820546: what is y=-3x-4

y=-x+2
Define points x: y:
Click here to see answer by stanbon(75887)

Question 820627: Solve the systems of equations by substitution y=-x y=-2x
Click here to see answer by TimothyLamb(4379)

Question 820690: Patty and Toby live 345 miles apart. They decide to drive to meet one another. Patty leaves at noon traveling at an average rate of 45 mph and Toby leaves at 3:00 pm traveling at an average speed of 60 mph. At what time will they meet?
Click here to see answer by mananth(16946)

Question 820737: Solve the following system of equations.
4a+7b=-24
8a+3c=2
6b+3c=-30
Click here to see answer by TimothyLamb(4379)

Question 820650: x + y + z = 200
3x + 5y + 4z =870
y=4z
You can use substitution solve the system above. Substitute 4z for y in the first two equations. What new system in two variables do you get?
Click here to see answer by TimothyLamb(4379)

Question 820848: Could you please help me answer this equation:
(z^2+9z+14/z^2+11z+28) / (z^2+2z/z^2+9z+20) Answered in lowest terms
Click here to see answer by ewatrrr(24785)

Question 820887: how do i solve 2x-7y=-29 and 7x+2y=-22 using the addition method
Click here to see answer by ewatrrr(24785)

Question 821001: How do distributive property ?
Click here to see answer by richwmiller(17219)

Question 821212: √3:(y^3+5)^18
Click here to see answer by jim_thompson5910(35256)

Question 820477:
Click here to see answer by tommyt3rd(5050)

Question 821256: Solve.
y = -5x � 6
y = -x + 6
Click here to see answer by ewatrrr(24785)

Question 820827: x + 2y = 1
7x - 5y = 26
I need to solve using substitution,
Click here to see answer by TimothyLamb(4379)

Question 821568: solve the linear system 5x-5y=-20 and 15x +5y=10

Click here to see answer by Alan3354(69443)

Question 821568: solve the linear system 5x-5y=-20 and 15x +5y=10

Click here to see answer by TimothyLamb(4379)

Question 821670: if a system has an infinate number of solutions use set buider notation to write the solution set if a system has no solution state this (the substitution method
t=4-2s, t+2s=6
the answer I got then got lost was
(4-2s)+2s=6 please help
Click here to see answer by stanbon(75887)

Question 821760: can someone explain to me how to complete this question
graph the following system of lineal inequalities
y≥-3
y>5-2x
Click here to see answer by LinnW(1048)

Question 821807: The sum of the digits of a three-digit number is 11. If the digits are reversed, the new number is 46 more than five times the old number. If the hundreds digit plus twice the tens digit is equal to the units digit, then what is the number?
Click here to see answer by jsmallt9(3758)

Question 821893: i've never encountered a question about solving the system that involved X^2 and y^2. I'm confused on how to first tackle the problem.
3y-x=5
x^2-y^2=-3
Click here to see answer by Alan3354(69443)

Question 822051: how do you work out -5x+3=6 x-y=4 by elimination

Click here to see answer by josgarithmetic(39617)

Question 822059: given the equation 3x+9y=-8, write a second linear equation to create a system that:
� has exactly one solution. Explain your reasoning
� has no solution. Explain your reasoning
� has infinitely many solutions. Explain your reasoning
� interpret the meaning of the solution, if it exist, in the context of the graph of the following system if equations.
-5x+2y=10
10x-4y=20
Click here to see answer by TimothyLamb(4379)

Question 822196: What is the slope of the line that is perpendicular to the line whose equation is 2x + y = 4.

a. -2
b.-1/2
c.1/2
d. 2
Click here to see answer by ewatrrr(24785)

Question 822197: What is the equation of the line described below written in slope-intercept form?
the line passing through point (0, 4), perpendicular to the line whose equation is y = -x

a. y = -4x
b. y = -4x + 4
c. y = x + 4
d. y = 4x + 4

Click here to see answer by ewatrrr(24785)

Question 822202: What is the equation of the line described below written in slope-intercept form?
the line passing through point (0, 0) and parallel to the line whose equation is 3x + 2y - 6 = 0

y = -x
y = -x
y = x
Click here to see answer by rothauserc(4718)

Question 822200: What is the equation of the line described below written in slope-intercept form?
the line passing through point the origin, parallel to the line whose equation is y = -2x + 5

y = -2x
y = -x
y = x
y = 2x

Click here to see answer by TimothyLamb(4379)

Question 822592: k^2 81/121
Click here to see answer by Alan3354(69443)

Question 822638: The cost to mail a package is $7 for the first 2 pounds and 30 cents for each additional ounce.
Which of the following functions represents the cost to mail a package if x is the number of ounces over 2 pounds?
Click here to see answer by josmiceli(19441)

Question 822621: During a baseball game, a player�s ball hit into the outfield is modeled by the equation h = �16t2 + 65t. A bird flying across the field follows the path modeled by the equation h = 8t + 20. Let t be the time since the ball is hit and h be the height. What do the intersection points of the equations represent?
Click here to see answer by josmiceli(19441)

Question 822726: y=3x and 2y=6x. what is the answer?
Click here to see answer by stanbon(75887)

Question 822763: how would I graph a linear inequality y is (greater than or equal to) 2x
Click here to see answer by vanaynay26(3)

Question 820195: 1) 3x+2y=6
2) -3x -3x
3) 2y=-3x+6
4) 1y=-3/2x+3
5) graph
Click here to see answer by vanaynay26(3)

Question 823086: What is the slope of the line that passes through the points (3, 1) and (�2, 5)?
Click here to see answer by heligirl(3)

Question 823092: The sum of three consecutive integers is �27. What are the numbers?
Click here to see answer by faceoff57(108)

Question 823108: There is a Carnival coming to town.
On Monday they sold 4 children tickets and 2 adult tickets for a total for $34
On Wednesday they sold 3 children tickets and 2 adult tickets for a total of $29
How much does one adult ticket cost?
Click here to see answer by TimothyLamb(4379)

Question 823148: Robert has 26 coins that are all nickels and dimes. The value of the coins is $1.85. Write and solve a system of equations that represents te situation.

Click here to see answer by ewatrrr(24785)

Question 823237: Use in your information from Activity 1 and 2. Assume that 200 students attend the dance.
Write a report listing which band you choose and the cost per ticket that you need to charge to cover expenses.
Repeat the process assuming that 300 students attend.

Click here to see answer by Alan3354(69443)

Question 823263: I have no clue in how to solve for mx+b=y. If i dont find out fast, im going to fail it and get kiked off my basketball team. Please help!!

Click here to see answer by TimothyLamb(4379)

Question 823639: begin eliminating the fractions by multiplying by 10
y/5+1/2=2y/5-1/10
______a^0
Click here to see answer by Alan3354(69443)

Question 823751: 1/2x+ 2y=6
X-6y=2
Click here to see answer by TimothyLamb(4379)

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