Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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Question 125168: Solve the following system by substitution
8x-4y=16
y=2x-4
Show your solution below:
What is the solution for this system?
What type of system is this?
please help
Click here to see answer by stanbon(75887)

Question 125181: Please help me graph this, thank you. y=2x
Click here to see answer by iluvbuilding429(41)

Question 125180: I need to graph this, please help me.
Click here to see answer by iluvbuilding429(41)

Question 125187: y=2x^2
Click here to see answer by checkley71(8403)

Question 125186: y=x+1
Click here to see answer by checkley71(8403)

Question 125185: y=x^2+1
Click here to see answer by checkley71(8403)

Question 125260: Quartic Regression? Can you define this?
Click here to see answer by MathLover1(20849)

Question 125280: I need your help on how to graph this equation,here is the question along with the equation.
Questions : Graph the function. Compare the graph with the graph of f(x)=x
Equation : g(x)=x+5
Please explain to me how to graph the equation, I'm confuse! Thanks

Click here to see answer by Earlsdon(6294)

Question 125270: Is this correct?

1. Multiply (x-2)(x+2); answer: x^2+4?
2. x^4-2x^3+5x^2+10x+12 for value of x=2 ; answer: 52?
3. A chemist has a 25% and a 50% acid solution. How much of each solution should be used to form 200ml of a 35% acid solution? ; answer: 120 ml of 25% and 80 ml of 50%?
I appreciate the help; hopefully I got them right.
Click here to see answer by checkley71(8403)

Question 125367: I really do not understand this statement.
Create a graph with four odd vertices.
Click here to see answer by stanbon(75887)

Question 125375: how do I identify the axis of symmetry, create a suitable
table of values, and sketch the graph?
y=x^2-5x+3
Click here to see answer by stanbon(75887)

Question 125394: Find the slope. x= -7
help
Click here to see answer by stanbon(75887)

Question 125392: Find the slope of the line passing through the points:
(4, 7) and (4, 5).
thank you
Click here to see answer by iluvbuilding429(41)

Question 125388: Find the slope of the line through the following pairs of points.
(- 3, 5) and (2, 10)
thank you
Click here to see answer by iluvbuilding429(41)

Question 125397: Solve the system by adding. x-y=-2, x+y=6
thanks for the help
Click here to see answer by jim_thompson5910(35256)

Question 125371: I am having a difficult time with this equation and graphing it. y=x^2-4x
Click here to see answer by jim_thompson5910(35256)

Question 125402: A chemist has a 25% and a 50% acid solution. How much of each solution should be used to form 200 mL of a 35% acid solution?
please help just one more time lol thank you so much
Click here to see answer by josmiceli(19441)

Question 125399: Jennifer has collected $4.50 in nickels and dimes. If she has 55 coins, how many of each kind of coin does she have?
im confused i just cannot do word problems
Click here to see answer by josmiceli(19441)

Question 125447: 1.) Solve the system.
4x + 3y = 11
3x - 2y= 4
2.) Is this right?: Jennifer has collected $4.50 in nickels and dimes. If she has 55 coins, how many of each kind of coin does she have? Answer: 35 dimes and 20 nickles.
3.) Solve the following linear inequality graphically.
x+ 2y <4
x - y <5
I've solved #2, hopefully it is right. Any help with checking that one and helping with the others would be highly appreciated.
Thanks!
Click here to see answer by stanbon(75887)

Question 125462: Would someone please help me with this question?
The sinusoid y=3cos(x+3)-2 has a
Answer options:
a. phase shift of 3 to the right
b. phase shift of 3 to the left
c. vertical shift up of 2
d. horizontal stretch by factor of 3
I think the answer is b., is this correct or where did I go wrong? Please get back to me as soon as possible, thanks!!!!!!
Click here to see answer by jjjjjjjj(1)

Question 125466: -2x+3y=4
Click here to see answer by checkley71(8403)

Question 125391: Solve the following systems by addition.
2x - y = 1
- 2x + 3y= 5
please help thank you

Click here to see answer by MathLover1(20849)

Question 125471: -2x+3y=4
Click here to see answer by MathLover1(20849)

Question 125470: 2x+y=5
Click here to see answer by MathLover1(20849)

Question 125467: 2x-y=5
Click here to see answer by MathLover1(20849)

Question 125469: 3x+2y=8
Click here to see answer by MathLover1(20849)

Question 125541: graph the following equation and then rewrite each to standard form:
y=-2x + 1
What does standard form mean?
Click here to see answer by josmiceli(19441)

Question 125570: Hello,
Please help!

equation 5x - 2y = 10 find the missing coordinate ( 6,a)
Thanks
Click here to see answer by stanbon(75887)

Question 125568:
Solve the system of equations by graphing.
y= x+2 y= -2x+5
Click here to see answer by checkley71(8403)

Question 125401: Theater tickets are $8 for general admission (GA) and $5 for students (STD).
During one evening 240 tickets were sold, and the receipts were $1680.
How many of each type of ticket was sold?
HELP!!!!!!
Click here to see answer by ankor@dixie-net.com(22740)

Question 125614: Hello,
Please help!
Solve the system of equation by elimination.
6x + 5y = -20
-6x - 10y = 25
Thanks
Click here to see answer by stanbon(75887)

Question 125638: I need help!
solve each system of equations by elimination
5x - 4y = 23
7x + 8y = 5
Thanks
Click here to see answer by iluvbuilding429(41)

Question 125672: Draw the graph of x=y^2 and discuss if it is a function or not

Click here to see answer by bucky(2189)

Question 125671: Find the minimum distance between f(x)=x^2 and y=2x-5
Click here to see answer by MathLover1(20849)

Question 125636: I need help!
solve each system of equations by elimination
5x - 4y = 23
7x + 8y = 5
Thanks
Click here to see answer by benni1013(206)

Question 125633: The length of a rectangle is 3 m more than twice its width. If the perimeter of the rectangle is 42 m, find the dimensions of the rectangle.
Click here to see answer by benni1013(206)

Question 125721: Please Please Please! help me solve this problem
Sketch the graph the feasible region.
x + y ≥ 7
5x + 7y ≥ 42
x≥0
y≥0

Click here to see answer by jim_thompson5910(35256)

Question 125736: 1. Graph each of the following equation, using the intercept method.
6x + y = 6

Click here to see answer by jim_thompson5910(35256)

Question 125737: 2. Find the slope of the line through the following pairs of points.

(4, 9) and (8, 17)

Click here to see answer by jim_thompson5910(35256)

Question 125743: 3. Write the equation of the line with given slope and y-intercept. Then graph each line using the slope and y-intercept.

Slope: 5; y-intercept: (0, -2)

Click here to see answer by jim_thompson5910(35256)

Question 125744: 4. Write the equation of the line passing through each of the given points with the indicated slope. Give your results in slope-intercept form, where possible.

(0, -3), m = -2

Click here to see answer by jim_thompson5910(35256)

Question 125745: 5. Solve each of the following systems by graphing.
2x � y = 8
x = 2

Click here to see answer by jim_thompson5910(35256)

Question 125625: Simplify each of the following expressions. (2x+y)+(-x-3y)
please help
Click here to see answer by applesrbest(7)

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11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 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