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

Tutors Answer Your Questions about Graphs (FREE)

Question 190279: Graph y=tan(x+3pi/2). Identify its period, undefined values, and phase shift.
Click here to see answer by user_dude2008(1862)

Question 190394: If I am graphing a piecewise function
f(x)={2x+1 if x<3
x-4 if x=>3
I have my points but the confusion is when I graph them I am not sure which way the lines should go whether it is up or down. For 2x+1 my points are (0,1) (2,5) (3,7) and for x-4 (0,-4) (1, -3) (2,-2)
Can you show me how this should look on a graph?
Anyone that could help it would be greatly appreciated.
Click here to see answer by jim_thompson5910(35256)

Question 190534: When examining the graphs of logarithmic functions, for what value(s) x is it not possible to determine log(x)? Explain your reasoning.
Click here to see answer by stanbon(75887)

Question 190566: Graph the following equation. Identify the values of a, b, c, as well as the major and minor axes. Calculate the eccentricity e.
x^2/5^2 + y^2/3^2=1
I worked it out to:
c=4
eccentricity is c/a=4/5
Question: How do I identify the major and minor axes?
Also, am I correct thus far?
Click here to see answer by stanbon(75887)

Question 190608: how do u solve a typical problem like this one A park ranger spent $104 to buy 12 trees.Redwood trees cost$12 each and spruce trees cost$8 each.How many of each tree did the park ranger buy?
Click here to see answer by jim_thompson5910(35256)

Question 190575: Is it possible for the graph of an inequality to consist of one number? If so, explain how is it possible?
Click here to see answer by solver91311(24713)

Question 190648: y=x+4
Click here to see answer by Mathtut(3670)

Question 190681: A quatdratic function has a Vertex at (-8,6). The function passes thru (-10,-8). When written in vertex form, the fuction is f(x) = a(x-h)^2+k, where:
a=( ? )
h=( -8 )
k=( 6 )
I understand the vertex = (h,k), I'm having trouble understanding how "a" is determined? Thanks in advance for your help.
Click here to see answer by stanbon(75887)

Question 190470: Graph the following function. Identify the equations of any vertical asymptotes.
y=8 over x^2-4
Click here to see answer by checkley75(3666)

Question 190449: if 2x-5y_<5 and 2x+y_<-3 how do you solve and graph it?
Click here to see answer by checkley75(3666)

Question 190815: I need to solve this problem and graph the equation:
x-2y=6
Here's what I have so far:
-2y=-x+6
y=1/2x + 6
What am I doing wrong??
Click here to see answer by jojo14344(1513)

Question 190816: Can you please help with this one:
Draw L1 through (-4,0) and (0,6). What is the slope of any line parallel to L1? Draw L2 throught the origin and parallel to L1.

Click here to see answer by jojo14344(1513)

Question 190830: solve for x, y intercepts -2x +3y =8
Click here to see answer by Mathtut(3670)

Question 190821: I need help!
The line through (-2,5) with slope -1.
Graph the line with the given point and slope.
Click here to see answer by Mathtut(3670)

Question 190836: Homework problem.
Help!!
solve for x
4 over (x-4)^2 = 1
Thanks
Click here to see answer by Mathtut(3670)

Question 190727: please slope and y-intercept.
f(x)=2/3x-7
Click here to see answer by Mathtut(3670)

Question 190915: write an equation of the line in slope-intercept form, containing the point (-4,5)and parallel to y=-3x=1.
Click here to see answer by nerdybill(7384)

Question 190916: Graph, find center, vertices, co-vertices and foci.
9x^2+4y=36
I worked it out to:
center(0,0)
a=3 b=2 c=5
vertices(0,+-3)
co-vertices(+-2,0)
foci(0,+-5)
eccentricity=5/3
Did I do this right? When I graph it, the foci is outside the circle. Is that right?
Click here to see answer by stanbon(75887)

Question 190921: How many ellipses have an eccentricity of 0,5 and cross the minor axis at (0,2)?
Click here to see answer by stanbon(75887)

Question 190925: the line containing the points(-2,-1) and (x,5)has a slope of -3.what is the value of x?
Click here to see answer by stanbon(75887)

Question 190927: 4x^3-36x=0
4x(x^2-9)=0
4x(x-3)(x+3)
Is this finished?
Click here to see answer by jim_thompson5910(35256)

Question 190927: 4x^3-36x=0
4x(x^2-9)=0
4x(x-3)(x+3)
Is this finished?
Click here to see answer by stanbon(75887)

Question 190932: Is the line parallel, perpendicular or neither??
y = x + 7
y = -x + 2
How do I figure this out?? Thanks for helping!
Click here to see answer by stanbon(75887)

Question 190926: Graph, find center, vertices, co-vertices,foci, and eccentricity e.
9x^2+4y^2=36
Click here to see answer by stanbon(75887)

Question 190944: A Line parallel to -3x + 2y = 9 and contains points (-2,1)
How do I set this up??
Click here to see answer by jim_thompson5910(35256)

Question 190948: Find the equation of each line in the form of y=mx+b
The line through (3, 2) with an undefined slope?
How do I set this problem up?? Thank you for your help!
Click here to see answer by Alan3354(69443)

Question 190943: Write an equation given a point and a slope
y + 3 = -3(x-6)
Can you please help!
Click here to see answer by Alan3354(69443)

Question 190963: Direct, inverse and joint variation. Use K for the constant in each case.
u varies inversely as n
Can you help?
Click here to see answer by solver91311(24713)

Question 190965: Solve the variation.
n varies directly as q, and n = 39 when q = 3. find n when q = 8.
Click here to see answer by Mathtut(3670)

Question 190964: Find the variation constant and write a formula that expresses the indicated variation.
c varies inversely as d, and c = 5 when d = 2
Click here to see answer by Mathtut(3670)

Question 190962: write a formula that expresses the relationship. Use K for the constant in each case.
m varies directly as p
I don't get this. Please help!
Thanks!
Click here to see answer by Mathtut(3670)

Question 191067: 1.Jenny wants to utilize a portion of her garden for growing flowers. Being a designer herself, she visualizes a triangular area with different lengths for each side. For this Jenny decides to keep a side of the triangular area 3 feet shorter and the other 2 feet longer than the third side. She also wants to restrict the perimeter of the triangular area to 32 feet, so that it does not cover a huge area of the garden. Determine the maximum length of each side of the triangular area that Jenny has visualized.
Click here to see answer by stanbon(75887)

Question 191144: This system is best solved by
y = 2x
2x + y = -12

Click here to see answer by solver91311(24713)

Question 191149: A graph has the following key features:
Decreasing for x > 0
y-intercept of 1
No x-intercept
A horizontal asymptote of y = 0
Domain: {x|xER}
Range:{y|y > 0, yER}
(1, 0.5) is a point of the graph
A possible function with all these key features is ______________________.

Click here to see answer by solver91311(24713)

Question 191170: If g(x) = bx and h(x) = logbx, would the graphs of these functions intersect if b = 1? If so, at what ordered pair?
Click here to see answer by Alan3354(69443)

Question 191131: Solve for x. Collect x's on the LEFT side of the inequality. The solution must be presented with x first, the correct inequality symbol, then the number.
2(x - 3) ≤ -12

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

Question 191381: Hello, can you please help me solve this problem.
--Solve the system by using the substitution method--
with this under it
Click here to see answer by jim_thompson5910(35256)

Question 191375: solve the inequality. then graph the solution
4x+3<-9 or 6x-7>-1
Click here to see answer by jim_thompson5910(35256)

Question 191548: I need to know the steps to find x and y on paper. I know how to plug these into a calculator and graph. However for this assignment I need to show the steps. Thank you!
F(x)= 3^-x
Click here to see answer by solver91311(24713)

Question 191683: y = 3x - 5
I need to graph this
Click here to see answer by Mathtut(3670)

Question 191820: graph the solution set of the compound inequality.

y<4 and y>-x+2

ISBN 9780073309361
Click here to see answer by Mathtut(3670)

Question 192013: Write and graph the polar equations for concentric circles centered at the origin with radii 2 and 4.
Click here to see answer by Alan3354(69443)

Question 191995: How do you graph the following system of equations. Describe both lines and the final graph. x-y<3 and 2x+y>1
Click here to see answer by Mathtut(3670)

Question 192082: Find the vertex and intercepts of the function : f(x)=x^2+x-2
This is what I have, is it correct if not, please explain/show.
Vertex: (-1 -18) ; Intercepts: (-2,0)(1,0)(0,2)
Click here to see answer by Mathtut(3670)

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