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

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Question 40667: write in standard form the equation of a line that satisfies the given conditions: x-intercept =5 and y-intercept= -4
Click here to see answer by checkley71(8403)

Question 40702: Line 6 passes through the intersection of Line 4 and Line 5 and has a slope of 2/3.
Line 4 is horizontal and passes through the point (0,9).
Line 5 is vertical and passes through the point (6,-3).
I need to figure out the equation for Line 6.

Click here to see answer by Nate(3500)

Question 40703: Line 2 is perpendicular to a line that passes through the points (4,-3) and (-2,6). How do I find the slope intercept (y=mx+b) and the general form (Ax+By=C)?
Click here to see answer by Nate(3500)

Question 39917: How do you work out the problem?
Click here to see answer by mszlmb(115)

Question 41059: SOLVE FOR X PLEASE
AX+BY=M
BX+AY=C
THANK YOU
Click here to see answer by fractalier(6550)

Question 41268: please solve for x and y
y=-2x+6
y=x
Click here to see answer by Nate(3500)

Question 41269: 3. y=-x-5 please solve these im not stupid the questions are just hard
x=-3
4. y=x-6
y=-4
5.y=-x-4
y=x+2
6. y=x-3
y=-x+5
Click here to see answer by Nate(3500)

Question 41272: please simplify and solve
1. 4x+y=2
x+2y=4
2. -x-5y=-6
3x+y=4
3. -3x+2y=7
x+y=-7
4.2x+3y=5
-x+2y=1
5.-x+2y=-6
4x-3y=4
6.4x+y=-6
3x-2y=1
Click here to see answer by zeynep(43)

Question 41529: 1. Are the following lines parallel, perpendicular, or neither?
L1 with equation x � 2y = 10
L2 with equation 2x + y = 2

2. Given f(x) = �x3 � 3x2 + 3x + 7, find f(�1), f(0), and f(2)
Many thanks in advance since I am doing my finals!
Click here to see answer by stanbon(75887)

Question 41575: Solve the following equations:
a)2^3x-1=1/128 b) ln(4x-3)=1
Click here to see answer by Nate(3500)

Question 41943: Solve by substitution
4x-12y=5
-x+3y=-1
Click here to see answer by fractalier(6550)

Question 41858: Write a system of two equations in two unknowns. Solve the system by using the substitution method. � Bill and Sue together earn $76,433 per year. If Bill earns $15,000 less than twice Sue�s salary, then how much does each person earn per year? �

Click here to see answer by checkley71(8403)

Question 42149:
1. The sum of three consecutive even numbers is 144. Find the numbers.
2. The sum of 4 consecutive odd integers is -88. Find the numbers.
3. Find three consecutive numbers such that 12 than less three times the first number is the same ad the sum of the other 2.
4.On a map 2 inches represents 35 miles. if two cities are 11 inches apart on a map,how many miles are they apart?
Click here to see answer by checkley71(8403)

Question 42159: Mr. Simon invests a total of $7003 in two savings accounts. One account yields 7.5% simple interest and the other 8.5% simple interest. He would like to find the amount placed in each account if a total of $582.33 in interest is received after one year. Write a system of linear equations to express this problem.Please explain thanks.
I really need help with word problems.
thanks
Click here to see answer by Nate(3500)

Question 42345: please help me solve
Click here to see answer by Nate(3500)

Question 42778: solve using the addition method
3x+2y=1
5x+3y=3
can you show me how to work this problem out?
Click here to see answer by Nate(3500)

Question 42778: solve using the addition method
3x+2y=1
5x+3y=3
can you show me how to work this problem out?
Click here to see answer by tutorcecilia(2152)

Question 42836: what are the three types of linear systems
Click here to see answer by fractalier(6550)

Question 42937: Write the equation of the line that passes through point (6,4) with a slope of 2?
Click here to see answer by fractalier(6550)

Question 43309: I'm not finding a single solution to the attached problem. It seems they would all be true. What am I missing??

Solve the system of inequalities.
{ x+y greater than or =16 and y greater than or =x
Select the correct answer.
a. { xgreater than or =8-y, y<4 and xgreater than or =y, ygreater than or =4
b. { xless than or =16-y, yless than or =12 and xless than or =y, y < 12
c. { xless than or =16-y, ygreater than or =8 and xless than or =y, y < 8
d. { xless than or =16-y, ygreater than or =5 and xless than or =y, y < 5
e. { xless than or =16-y, ygreater than or =13 and xless than or =y, y < 5
A paysite for tutoring gave me the following answer, but I don't understand. I drew the graph, but I don't understand why C is the answer. Their answer was "The value of y in immaterial, that is y >or= 8 or y < 8.
Option (c)" Why is the value of Y immaterial?? If I didn't shave my head, I'd still be bald!! Thanks for any help.

Click here to see answer by stanbon(75887)

Question 43456: Use the line of best fit for the set of data below to approximate the value of y when x = 4.
x -2 -1 0 1 2
y 7 6 3 2 0

a. y = -3.6
b. -0.22
c. 10.8
d. -10.8
e. None of the others
Click here to see answer by venugopalramana(3286)

Question 43455: Find the correlation coefficient for the line of best fit of the set of data below. Round your answer to three decimal places.
x -2 -1 0 1 2
y 7 6 3 2 0

a. -0.988
b. -0.976
c. 1.95
d. -0.54
e. None of the others
Click here to see answer by venugopalramana(3286)

Question 43668: Find the slope and y-intercept for the linear equation 36x + 6y = 24
Click here to see answer by checkley71(8403)

Question 43787: Solve the following equation.
z,z-6,3x
Click here to see answer by Nate(3500)

Question 43783: -3/5<1/5-2/15w<-1/3
Click here to see answer by benni1013(206)

Question 43954: Tell whether the systems of equations have only one ordered pair as a solution or not. Also explain your answer by telling whether the graphs of the equations are parrallel lines, intersecting lines, or the same line.
x + 2y = 3
2x + 4y = 6
Click here to see answer by fractalier(6550)

Question 43953: Tell whether the systems of equations have only one ordered pair as a solution or not. Also exlpain your answer by telling whether the graphs of the equations are parrallel lines, intersecting lines, or the same line.

x + 2y = 3
x + 2y = 6
Click here to see answer by fractalier(6550)

Question 43960: Solve the pairs of equations by using the substitituion method.
x + 2y = 10
x = 3y
Click here to see answer by fractalier(6550)

Question 43959: Sovle the pairs of equations using the substitituion method.
x - y = 26
3x - 8y = 3
So far I have: 3(26 + y) - 8y = 3 69y - 8y = 3
Click here to see answer by fractalier(6550)

Question 43955: Solve the pairs of equations using the addition or subtraction method.

x + y = 15
x - y = 3
I have: 2x = 18 x = 9, but I don't know if it's right and Ican't figure out the rest.
Click here to see answer by benni1013(206)

Question 43850: Solve by any method. Assume a and b represent nonzero constants.
ax + by = 3
ax - by = 10
Click here to see answer by adamchapman(301)

Question 43973: Why is the graph of F(x)=x*x^-1 not the same as the graph of y=1?
Click here to see answer by stanbon(75887)

Question 44003: ok this is a word problem i just for some reason cannot find out .....
The sum of the ages of joe and jim is 62. Five years from now, joe will be twice Jim's age. Find joe's present age? Sorry this question is not out of a text book.
Thank you very much for the help,
Jesse
Click here to see answer by adamchapman(301)

Question 44004: what is the slope foe : (1/7, 1) , (2, 1/2) ? how do u solve it?
i need to slove for b . i got -7/26 is that right?

thanks
Click here to see answer by adamchapman(301)

Question 44009: Suppose x and y satisfy both of follwing equations below. Then y = ?
x-3y=7 and 2x+4y=5
Thanks.
Click here to see answer by adamchapman(301)

Question 44025: I've got this question: An open-top box is to be constructed from a 6 by 8 foot rectangular cardboard by cutting out equal squares at each corner and the folding up the flaps. Let x denote the length of each side of the square to be cut out.
a)Find the function V that represents the volume of the box in terms of x.

I've managed to come up with volume of the box is width x length x height = (6-2x)(8-2x)x. This is where it ends for me, I can't figure out how to solve it and I need to solve it, because I have to graph it.

b) Graph this function and show the graph over the valid range of the variable x.
PLEASE PLEASE HELP!

Click here to see answer by Earlsdon(6294)

Question 44339: Hello,
I could really use help with this problem:
Find all possible pairs of numbers such that the first is at least 8 more than 4 times the second, and 12 less than three times the first is at most 12 more than 8 times the second.
Thank you in advance,
Louis
Click here to see answer by Nate(3500)

Question 44615: . (4) Solve the system of equations.
6x � 2y = 2
9x � 3y = 1
Click here to see answer by venugopalramana(3286)

Question 44750: equation with 3 linear variables
2x-y+z=10
4x+2y-3z=10
x-3y+2z=8
wouldn't you divide the first equation by 2?
Click here to see answer by venugopalramana(3286)

Question 44751: equations with 3 linear variables
6x-4y+5z=31
5x+2y+2z=13
x+y+z=2
should you multiply the 2nd equation by 2?
show work
Click here to see answer by venugopalramana(3286)

Question 44704: equations in three linear variables
6x-4y+5z=31
5x+2y+2z=13
x+y+z=2
wouldn't you multiply the second equation by 2?
Click here to see answer by OHtutor(16)

Question 44821: 2x-y+z=10
4x+2y-3z=10
x-3y+2z=8
solve for x, y,z
i have so far
2x-y+z=10
4x+2y-3z=10
multiply the first equation by 2 which gives
4x-2y+2z=20
am i on the right track
Click here to see answer by stanbon(75887)

Question 44703: equations in three linear variables
2x-y+z=10
4x=2y-3z=10
x-3y+2z=8
wouldn't you multiply the first equation by 3?
Click here to see answer by corrie21(4)

Question 44966: 2x+3y-z=4
3x+2y+2z=6
4x-y+3z=5
solve in three variables
Click here to see answer by josmiceli(19441)

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