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

Tutors Answer Your Questions about Graphs (FREE)

Question 103988: We have graphed the boundary line for the linear inequality. Determine
the correct half�plane in each case, and complete the graph. y>3
Click here to see answer by jim_thompson5910(35256)

Question 103987: You have at least $30 in change in your drawer, consisting of dimes and quarters. Write an inequality that shows the different number of coins
in your drawer.
Click here to see answer by jim_thompson5910(35256)

Question 104002: Find the equation, in standard form, with all integer coefficients, of the line perpendicular to x + 3y = 12 and passing through (9, -5).

I normally do not ask for help, but I am lost on this problem. If anyone can help, I would greatly appreciate it.

Click here to see answer by jim_thompson5910(35256)

Question 104034: You do not have to graph this.
What is the slope of the given points (7,5) and (10,-1)
Click here to see answer by jim_thompson5910(35256)

Question 104033: Solve the system by graphing.
2x + 4y = 2
x + 2y = 1
Again someone help me please.
Click here to see answer by jim_thompson5910(35256)

Question 104099: 1. y=5x^-2 (2 is negative exponent)
2. 3x-1=5x-y
3. y=|x|+3
4. x+2=2x-1
Click here to see answer by edjones(8007)

Question 104109: How would you solve for the slope?
(-9,6) and (-4,5)
Click here to see answer by TP(29)

Question 104121: The sum of two mubers is 36. Their difference is 12. What are the two numbers?
Click here to see answer by dr2400(1)

Question 104121: The sum of two mubers is 36. Their difference is 12. What are the two numbers?
Click here to see answer by TP(29)

Question 104123: Find the equation for the information given. (you can do this in slope intercept form or point intercept form)
Slope of the line is 2 and passes through the point (4,6).
Click here to see answer by jim_thompson5910(35256)

Question 104153: An arithmetic student needs an average of 70 or more to receive credit for the course. She scored 82, 64, and 98 on the first three exams. Write an inequality representing the score she must get on the last test to receive credit for the course.
Click here to see answer by stanbon(75887)

Question 104159: how do i graph 6x+5.5y=200
Click here to see answer by stanbon(75887)

Question 104119: The sum of two numbers is 36. their difference is 12. What are the two numbers?
Click here to see answer by elima(1433)

Question 104166: Graph the inequality:
x + y is greater than or equal to 6
Click here to see answer by jim_thompson5910(35256)

Question 104120: The difference of two numbers is 49. The second is 8 less then 4 times the first. What are the two numbers.
Click here to see answer by elima(1433)

Question 104194: what is the equation for the line that passes through the points (3,5)and(4,1)?
Click here to see answer by checkley75(3666)

Question 104196: what is the equation for a line with a slope of 1/2 and passes through the point (-2,3)
Click here to see answer by checkley75(3666)

Question 104193: Describe a system of linear inequalities for which there is no solution
Click here to see answer by stanbon(75887)

Question 104430: Plot the point with coordinates (3, �5).
HELP PLEASE!! Sorry for all the ?'s tonight I am not understanding this at all.
Click here to see answer by jim_thompson5910(35256)

Question 104555: Write the equation of the line L satisfying the given geometric conditions:
L has y - intercept (0,3) and is parallel to the line with equation y= 3x-5
Click here to see answer by edjones(8007)

Question 104554: write the equation of the line passing through each of the given points with the indicated slope. (rewrite in standard from) Give your results in slope-intercept form, where possible.
(2,-3) and (2,4)

Click here to see answer by checkley75(3666)

Question 104344: This is the question -
If (x,y) is a point on the line l of slop -2 and y intercept 2, y=-2x+2. (So,
for example, if (23,y) is a point on l, y= -2(23)+2= -44.) k is the line that is
perpendicular to l and contains the point (18,13). If (x,y) is a point on k,
express y in terms of x.
Thank you for any help that you can give me to understand this type of question.
Click here to see answer by ankor@dixie-net.com(22740)

Question 104551: write the equation of the line passing through each of the given points with the indicated slope. (rewrite in standard from) Give your results in slope-intercept form, where possible.
(0,5), m= -3/5
Click here to see answer by stanbon(75887)

Question 104552: write the equation of the line passing through each of the given points with the indicated slope. (rewrite in standard from) Give your results in slope-intercept form, where possible.
(-1,3) and (4, -2)
Click here to see answer by checkley75(3666)

Question 104600: having a difficult time with finding the answer to a - 8 = 23? how do i solve a? and 13 + z = 6 how do I solve for z

Click here to see answer by kingster64(2)

Question 104600: having a difficult time with finding the answer to a - 8 = 23? how do i solve a? and 13 + z = 6 how do I solve for z

Click here to see answer by tutorcecilia(2152)

Question 104632: This is from 4.7 Challenge: Skills and Applications
Questions 5 & 6
In 1992, 7.6 million music videos were shipped and in 1996, 16.9 million were shipped.
Write an equation you can solve to find the year that the model predicts 25 million music videos will be shipped.
Then solve the equation graphically. Interpret the result.
Things I know: rate of change is 2.325 million per year.
Tried this equation:
25 =2.325x +7.6 (knowing all numbers in millions)
so to graph I got y=2.325x - 17.4
but now I have a negative graph and I know that is wrong.
So I am thinking what I got is x=years later, not the year. How do I get the year in one equation instead of 2?
Thanks for any help.
Click here to see answer by stanbon(75887)

Question 104718: Hi, I have been struggling all morning with a problem. Here it is:
The length of a rectangle is 1 less than twice its width. If the width is 3 more than one-seventh of the perimeter, find the dimensions of the rectangle.
While I can come up with a value for P which is a term, not a value, I cannot come up with any actual dimensions, and my answer will not proof out. I have approached the problem different ways, such as width=x and length=2x+1 (using the 2L = 2S = P standard equation for finding perimeter), and w=1/7 P - 3, etc. for length, but I cannot come up with an actual answer. Thanks in advance.
Maddie
Click here to see answer by doukungfoo(195)

Question 104740: 50. Solve each system by substitution or addition, whichever is easier.
2y-x=3
x=3y-5
What are the steps to solving this problem?
Click here to see answer by doukungfoo(195)

Question 104641: Find the slop of a line graph containing the points (3,y)? (Page 231 problem 13)
Click here to see answer by elima(1433)

Question 104744: PLEASE HELP!!!!!
L HAS Y-INTERCEPT (0,-3) AND IS PARALLEL TO THE LINE WITH THE EQUATION Y= 2/3x + 1
Click here to see answer by duggie(26)

Question 104744: PLEASE HELP!!!!!
L HAS Y-INTERCEPT (0,-3) AND IS PARALLEL TO THE LINE WITH THE EQUATION Y= 2/3x + 1
Click here to see answer by Fombitz(32388)

Question 104784: Find the slope and y-intercept of the line represented by each of the following equation.
2x-3y=6
Click here to see answer by doukungfoo(195)

Question 104802: Write the equation of the line with the given slope and y-intercept. Then graph each line using the slope and y-intercept.
-2; y-intercept : (0,4)
Click here to see answer by cheesey(22)

Question 104866: If the inequality is y<-4 will the line be solid or dashes?

Click here to see answer by crazycutie(1)

Question 104845: xsquared=-8y
Click here to see answer by edjones(8007)

Question 104870: Hi tutors
I submitted a few questions earlier and was wondering if it was possible to recieve help on them. How long does it normally take to recieve answers back? I'm really new on this website. Anyways thanks to the tutor who answered my question earlier. I'm really excited about finding this site, my anxiety has gone down a lot!
Jena
Click here to see answer by duggie(26)

Question 104911:
58) x-2y=6
60) x+4y=5

Click here to see answer by HyperBrain(694)

Question 104909: I am just beginning with graphing and I am trying to graph y=4x-1 and y=3x+15 to find x. I've solved the equation algebraically but am having a hard time and getting a different outcome each time I graph...and none of them cross at x=16!
I would appreciate any help.
Thanks
Click here to see answer by edjones(8007)

Question 104936: Find the standard form of the equation of the circle which passes through the point (4, -5) and center at (-2,3)
Click here to see answer by Fombitz(32388)

Question 104936: Find the standard form of the equation of the circle which passes through the point (4, -5) and center at (-2,3)
Click here to see answer by edjones(8007)

Question 105106: how do i find the points to plot on a graph for the equation 4x+y=14
Click here to see answer by kmcruz09(38)

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