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

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Question 122760: Find the x-intercept of y = x squared - 3x - 10


Find the axis of symmetry of y = -x squared - 6x + 2

Click here to see answer by josmiceli(19441) About Me 

Question 122768: Solve the system by substitution.
x + y = 12
y = 2x

Click here to see answer by checkley71(8403) About Me 

Question 122767: can someone check this i'm really lost i thought i had it and now i dont think i do. Solve the system by graphing x+y=3,x+y=-1
x+y=-1
x-x+y=-1-x
y=-1-x
y=-1-(3-y)
y=-4y
x=3-(4y)
x=-1

Click here to see answer by jim_thompson5910(35256) About Me 

Question 122795: Could someone PLEASE show me the graphs for these equations? Thank you!
(a) y = -3/2x + 1
(b) y = -2/3x + 1
(c) y = 2x - 1
(d) y = 1/2x - 1

Click here to see answer by bucky(2189) About Me 

Question 122819: A roof rises 7.25ft over a horizontal distance of 16.62ft. What is the slope of the roof to the nearest hundredth?
Click here to see answer by bucky(2189) About Me 

Question 122816: find the slope and y-intercept
x = -7

Click here to see answer by MathLover1(20849) About Me 

Question 122821: I have looked in my textbook to try to figure out how to do this but it has not helped me. i was wondering if you could explain it better:
Write each equation in stadard form using integers
1. y=4x-11

2. y=2/3x-25/3
thanks for helping

Click here to see answer by MathLover1(20849) About Me 

Question 122814: Graph the equations.
(1) y = x + 1
(2) y = 2x squared

Click here to see answer by jim_thompson5910(35256) About Me 

Question 122829: Could someone PLEASE graph this equation for me? Thank you!!
x = 3

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 122813: Graph the equations.
(1) y = -x squared + 3x
(2) y = x squared + 1

Click here to see answer by jim_thompson5910(35256) About Me 

Question 122812: Graph the equations.
(1) y = x squared - 4x
(2) y = -x + 1

Click here to see answer by jim_thompson5910(35256) About Me 

Question 122864: how do i find the slope of the line passing through the points : (-3,0);(-4,6)???
Click here to see answer by checkley71(8403) About Me 

Question 122811: Graph the equation
(1) y = -x squared +1
(2) y = 2x

Click here to see answer by jim_thompson5910(35256) About Me 

Question 122869:
Given f(x)=3x+1, find f(a+3)

Click here to see answer by checkley71(8403) About Me 

Question 122874: Would the equation of the line with x-intercept (-,0) and undefined slope be: x = 0?? Thanks!
Click here to see answer by jim_thompson5910(35256) About Me 

Question 122878: The length of a rectangle is 3 in. more than twice its width. If the perimeter of the rectangle is 36 in., find the width of the rectangle.
Click here to see answer by checkley71(8403) About Me 

Question 122925: Solve the system by substitution.
3x – 3y = –12
y = –3x – 12

Click here to see answer by jim_thompson5910(35256) About Me 

Question 122912: I need help with this one please. I have to graph and identify the y intercept
y = 3/2x + 2 Thanks so much for any help.

Click here to see answer by checkley71(8403) About Me 

Question 122935: Could someone please show me a graph of the equation 3x + 2y = 6?? Thanks!
Click here to see answer by jim_thompson5910(35256) About Me 

Question 122943: Graph the line: 3x + 4y =12

Click here to see answer by jim_thompson5910(35256) About Me 

Question 122986: Sally bought three chocolate bars and a pack of gum and paid $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00. Find the cost of a chocolate bar and the cost of a pack of gum.
Click here to see answer by checkley71(8403) About Me 

Question 122972: Solve the system by substitution.

x – 5y = 2 2x + 3y = 17

Click here to see answer by checkley71(8403) About Me 

Question 122999: Show the equation used for the solution
In a town election, the winning candidate had 220 more votes than the loser. If 810 votes were cast in all, how many votes did each candidate receive?

Click here to see answer by stanbon(75887) About Me 

Question 123007: It contains a graph to find the constant of a slope. I know how to find the slope but not a constant, teacher is not helpful, he describes the problem so he knows it, which is not helpful to children.
The problem shows a graphy with a blue line stretching from Q2's top left corner and reaching Q4's bottom right corner. In Q4 it shows a blue dot at
(2,-2) then another blue dot at (0,0) Then it says y= -x
I cannot seem to figure this out

Click here to see answer by checkley71(8403) About Me 
Question 123007: It contains a graph to find the constant of a slope. I know how to find the slope but not a constant, teacher is not helpful, he describes the problem so he knows it, which is not helpful to children.
The problem shows a graphy with a blue line stretching from Q2's top left corner and reaching Q4's bottom right corner. In Q4 it shows a blue dot at
(2,-2) then another blue dot at (0,0) Then it says y= -x
I cannot seem to figure this out

Click here to see answer by stanbon(75887) About Me 

Question 123012: This question is from the book Hutchison, D., Bergman, B., Baratto, S., & Hoelzle, L. (2005). Beginning algebra (6th ed.). New
York: McGraw-Hill
A google search says this question has been asked before; however, went I link to the page and search I cannot find it, if it is out there I'm sorry but I can't seem to get it.
Rewrite the equation -3x+4y=11 as a function of x.
Any explanation of how to accomplish this would be so helpful. The textbook just isn't making sense to me. Thanks!

Click here to see answer by stanbon(75887) About Me 

Question 123014: This question is from the book Hutchison, D., Bergman, B., Baratto, S., & Hoelzle, L. (2005). Beginning algebra (6th ed.). New
York: McGraw-Hill
I thought I had graphing down okay but this one is very confusing for me for some reason. Any help would be appreciated. Thanks!
The question is asking to graph the function (that is where I get confused)
f(x)= -2x - 5

Click here to see answer by stanbon(75887) About Me 

Question 123016: This question is from the textbook Hutchison, D., Bergman, B., Baratto, S., & Hoelzle, L. (2005). Beginning algebra (6th ed.). New
York: McGraw-Hill. (I do not have the actual book so no ISBN #)
The question is asking to evaluate each function for the value specified.
f(x)=Xsquared-7x+10; find (a) f(0), (b) f(5), and (c) f(-2).
I'm sorry but I don't even know how to start this one. Any explanation of the process would be helpful and very, very appreciated. Thanks!

Click here to see answer by jim_thompson5910(35256) About Me 
Question 123016: This question is from the textbook Hutchison, D., Bergman, B., Baratto, S., & Hoelzle, L. (2005). Beginning algebra (6th ed.). New
York: McGraw-Hill. (I do not have the actual book so no ISBN #)
The question is asking to evaluate each function for the value specified.
f(x)=Xsquared-7x+10; find (a) f(0), (b) f(5), and (c) f(-2).
I'm sorry but I don't even know how to start this one. Any explanation of the process would be helpful and very, very appreciated. Thanks!

Click here to see answer by stanbon(75887) About Me 

Question 122982: Hi, my son just started a new school on Tues. Has an Algebra worksheet that he doesn't understand. I am normally able to help him, but I do not know how to do this type of problem.
1. Determine if the graphs of the equations y=2/3 and 3x+2=6 are parallel, perpendicular or neither.
2. Write an equation for the line that is paralled to y=1/2x-1. Tell how you know they are parallel.
3. Find the slope of the lines perpendicular to the graph of 3x-y=11.
4. Write an equation of the line that passes through (5,3) and is parallel to x+3y=6.
Any help or explanations would be greatly appreciated.

Click here to see answer by scott8148(6628) About Me 

Question 123034: Graph the following inequality:
4x + y > or = 4
i'm stuck please show how you graphed

Click here to see answer by stanbon(75887) About Me 

Question 123046: please help solve the following problems:

what is the slope of the line 5x-3y=1.
find the y intercept of the line whose equation is y= 9/4 x -11/4

find both x- intercept and the y intercept of the line given by the equation
8x - 7y + 13 = 0.
find an equation of the line that is paralledto the line y=-9x +8 and that pass through the (-1, -6).

Click here to see answer by checkley71(8403) About Me 

Question 123063: f(x)=4x-3 find f(-1)
please please pleas help!!!!!!

Click here to see answer by jim_thompson5910(35256) About Me 

Question 123074: Graph 3x+4y=7 and 5x+2y=12. I know how to do this. The next part of the problem asks: Find the exact coordinates of their point of intersection, and check your answer by substitution in the given equations. How do you go about doing this ?
Click here to see answer by jim_thompson5910(35256) About Me 
Question 123074: Graph 3x+4y=7 and 5x+2y=12. I know how to do this. The next part of the problem asks: Find the exact coordinates of their point of intersection, and check your answer by substitution in the given equations. How do you go about doing this ?
Click here to see answer by rapaljer(4671) About Me 

Question 123090: Graph the given function
f(x)= -2x - 5
and please show work thank you

Click here to see answer by jim_thompson5910(35256) About Me 

Question 123088: Evaluate the given function for the value specified. f(x)=xsquare - 7x+10 ; find (a) f (0), (b) f (5),and (c) f (-2).
a) f(0=>
b) f(5)=>
c) f(-2)=>
PLEASE HELP I AM SO CONFUSED

Click here to see answer by jim_thompson5910(35256) About Me 

Question 123087: Evaluate the given function for the value specified. f(x)=xsquare - 7x+10 ; find (a) f (0), (b) f (5),and (c) f (-2).
a) f(0=>
b) f(5)=>
c) f(-2)=>
PLEASE HELP I AM SO CONFUSED

Click here to see answer by oscargut(2103) About Me 

Question 123089: Rewrite the given equation as a function of x:
-3x + 4y =11
please help

Click here to see answer by oscargut(2103) About Me 

Question 123093: if the inventor charges 4$ per unit, then her profit for producing and selling x units is given by the function
P(x)= 2.25x - 7000
a.) what is her profit if she sells 2000 units?
b.)what is her profit if she sells 5000 units?
c.) what is the break even point for sales?
Please show work......
I am completely confused

Click here to see answer by tutor_paul(519) About Me 

Question 123125: f(x) = 4x-3
f(-1)

Click here to see answer by MathLover1(20849) About Me 

Question 122991: SOLVE BY GRAPHING
1. 2X-Y=4
2X-Y=6

Click here to see answer by MathLover1(20849) About Me 

Question 122992: solve the system by graphing
x-2y=8
3x-2y=12

Click here to see answer by MathLover1(20849) About Me 

Question 123140: f(x)=5x-1
f(a-2)

Click here to see answer by oscargut(2103) About Me 

Question 123157: Find the equation of the line given the folowing conditions. Write answers in slope intercept form
y intercept = -3
x intercept = 5

Factor
6x^2+8xz-9yz-12yz

Click here to see answer by solver91311(24713) About Me 

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