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

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Question 153694: Please help me solve the following problem:
State the x-intercepts of the graph of the equation. Then find the coordinates of the vertex.
y=(x+3)(x-5)
Click here to see answer by scott8148(6628)

Question 153844: what is the slope and y-intercept of the equation 5x-2=0?
Click here to see answer by jim_thompson5910(35256)

Question 23176: I can't figure out these problems i keep getting different answers everytime i solve them.
Identify the type of system of equations for the system below:
2y=4-6x
3y+9x=6

Identify the system of equations which has no solution.
a. 5x+2y=4
2x-2y=10
b. -x=3y+1
x=3y-1
c. x-2y=-6
2x=4y-12
d. x=2y-1
2x=4y
Click here to see answer by acacia<3(1)

Question 153912: Find the equation of the line, write your answer in slope intercept.
The line goes (1,4) and is parellel to x-2y=6
I have come up with the slope, I believe it is (1/2, -3)Is this correct?
Click here to see answer by checkley77(12844)

Question 154164: Hello,
I need to find the volume of the cube, in cubic inches for:
2x^2/z
The 2X^2 is over z
Thanks!
Click here to see answer by Alan3354(69443)

Question 154191: Five years ago a man was seven times as old as his son. Five years hence, the father will be three times as old as his son. Find their present ages.
Click here to see answer by josmiceli(19441)

Question 154238: A. Find the equation of the line passing through the points (3, -5) and ( 1, -2).
B. Find the equation of the line perpendicular to the line you found above and passing throught the point ( -1, - 2)
Click here to see answer by josmiceli(19441)

Question 154278: I am studying the cliffsnotes algebra 1 book. My problem is solving equations with two variables. The example problem in the book is 3x+3y=24 and 2x+y=13. The example in the book starts the problem out by multiplying the 2x+y=13 by 3.
I wanted to know why 3. The example wants the x and y solved for both equations. The book explains to subtract the equations.
I would appreciate any help.
Click here to see answer by jim_thompson5910(35256)

Question 154343: 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.�
x + 2y = 5
3x + 4y = 1

Click here to see answer by jim_thompson5910(35256)

Question 154342: 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.�
x + 2y = 5
3x + 4y = 1

Click here to see answer by jim_thompson5910(35256)

Question 154341: 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.�
x + 2y = 5
3x + 4y = 1

Click here to see answer by jim_thompson5910(35256)

Question 154375: Hello, I have a question about a part of a linear equation. The question is: 5-(8+3x)=2x+3 I am very confused on how to solve the 5-(8+3x). Thank you for helping me!
Click here to see answer by jim_thompson5910(35256)

Question 154395: I am trying to solve for x on this problem, except I keep getting stuck and can not seem to get this correct. the problem is: 2 - (5/3)x = 3x + (3/2), please let me know how you arrive at a solution if you would.
Thank you
Dave
Click here to see answer by Alan3354(69443)

Question 154416: 2x+y=4
x+y+2
im stuck i need help solving this can you give me some help
Click here to see answer by jim_thompson5910(35256)

Question 154804: Solve each of the following systems by the elimination method
1/4x - 1/6y = -2
-1/6x + 1/5y = 4

Click here to see answer by orca(409)

Question 154839: Hi! Please help me, I'm stuck
1/2x + 1/3y = 13
2/5x + 1/4y =10

Click here to see answer by Fombitz(32388)

Question 154839: Hi! Please help me, I'm stuck
1/2x + 1/3y = 13
2/5x + 1/4y =10

Click here to see answer by checkley77(12844)

Question 154933: How do you figure this out when y is isolated on both equations:
y=3x+1
y=6x-1
Thank you
Click here to see answer by scott8148(6628)

Question 154933: How do you figure this out when y is isolated on both equations:
y=3x+1
y=6x-1
Thank you
Click here to see answer by stanbon(75887)

Question 154933: How do you figure this out when y is isolated on both equations:
y=3x+1
y=6x-1
Thank you
Click here to see answer by orca(409)

Question 155058: Joe has a collection of nickels and dimes that is worth $5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. How many dimes does he have?
Click here to see answer by jim_thompson5910(35256)

Question 155059: An express and local train leave Gray�s Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local, and arrives 1 hour ahead of it. Find the speed of each train.
Click here to see answer by jim_thompson5910(35256)

Question 155060: Walt made an extra $9000 last year from a part-time job. He invested part of the money at 9% and the rest at 8%. He made a total of $770 in interest. How much was invested at 8%?
Click here to see answer by jim_thompson5910(35256)

Question 155090: Why is x = 4 a vertical line

Click here to see answer by stanbon(75887)

Question 155071: 2x-6y=11,
-3x+9y=-18
Click here to see answer by checkley77(12844)

Question 155125: how do u solve 5+2x-6=3x-1 and what is the anwser?
Click here to see answer by oscargut(2103)

Question 155164: -7+4m=6m-5
Click here to see answer by Earlsdon(6294)

Question 155192: -x+3y=-5 how to find the slope

Click here to see answer by Earlsdon(6294)

Question 155406: This is the addition method, you have to multiply before you add to get the solution set.
I thought that the first problem was set up as 1(x+y)=(48)1 then I got lost???
x+y=48
12x+14y=628
Click here to see answer by nerdybill(7384)

Question 155410: I have to graph (on a straight line graph)this linear equality solution.
-h<=-14 (-h less than,equal to -14)
I'm positive I can't graph this due to the negative variable. But no where in my book does it show how to move ahead when I end up in this situation ??
Can you please show me how to graph this equation or how to get rid of a negative variable
Thanks~
Click here to see answer by ankor@dixie-net.com(22740)

Question 155455: Find the values of x and y that solve the following system of equations.
3x+5y=25
-7x+4y=20
Click here to see answer by oscargut(2103)

Question 155456: Find two numbers whose sum is 70 and such that one is 4 times as large as the other.
Click here to see answer by oscargut(2103)

Question 155466: What is the systems unique solution?

y=2x-3
y=-x-3
Click here to see answer by oscargut(2103)

Question 155458: Flying against the jetstream, a jet travels 3700 km in 5 hours. Flying with the jetstream, the same jet travels 9280 in 8 hours. What is the speed of the jet in still air, and what is the speed of the jetstream?

Click here to see answer by checkley77(12844)

Question 155457: Two rainstorms occurred in one week in a certain area. The first storm lasted 15 hours, and the second storm lasted 25 hours, for a total 1250mL of rain. What was the rate of rainfall for each of the two storms if the sum of the two rates was 60mL per hour?

Click here to see answer by munisa(5)

Question 155533: Please help me solve this system of linear equations : 2x-10y=1
3x-15y=4
Click here to see answer by checkley77(12844)

Question 155763: Please solve
2X-9=5x-7
Click here to see answer by checkley77(12844)

Question 152103: i need to solve this question algebracially
3/4x-2/5y=2
1/2x-3/5y=-2
Click here to see answer by Fombitz(32388)

Question 155887: Adult tickets for a play cost $25 each and children's tickets cost $15each. The total receipts were $7200 and the total attendance was 400. How many adults and how many children attended?
Click here to see answer by jojo14344(1513)

Question 156160: 11+g+4-9=30
11+4m=4m+8
6a=2(4-a)
20=-5/4a
2(h-3)=5+13
how to solve it?
Click here to see answer by jim_thompson5910(35256)

Question 149204: x+2y=10
4x+5y=31
i need to kno what x and y equal..
I dont understand HOW to do this..
Click here to see answer by checkley77(12844)

Question 149204: x+2y=10
4x+5y=31
i need to kno what x and y equal..
I dont understand HOW to do this..
Click here to see answer by Alan3354(69443)

Question 156477: What is the slope of the line whose equation is 3x-4y-16-0?

work:
3x-4y-16=0
-3x -3x
-4y=-3x+16
\-4 \-4
y=-3x+16\4
Click here to see answer by nerdybill(7384)

Question 156473: y=mx-5
Solve for m.
I would like to understand all the rules of Algebra that apply to this equation...... "HELP!"
Click here to see answer by scott8148(6628)

Question 156649: the perimeter of a rectangle is 60 inches and the length is 4 inches longer than the width. Find the dimensions of the triangle.
Click here to see answer by mizjoice(22)

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