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

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Question 529832: The circumference C, in centimeters, of a healing wound is approximated by
C(r) = 6.28r, where r is the wound�s radius, in centimeters.
a) Find the rate of change of the circumference with respect to the radius.
b) Explain the meaning of your answer to part (a)
Click here to see answer by josmiceli(19441)

Question 529863: Could you please help me solve this equation with SUBSITUTION:
Y=-4x
Y=2x-3
I need to show my work.
Click here to see answer by josmiceli(19441)

Question 529972: Y=2 when x=20 need to write an inverse varation equation for x and y and then graph.
Click here to see answer by KMST(5328)

Question 530063: I've been trying to solve this for a few days and am having no luck and need some help please.
f(x)=sqrt x g(x)=x^2 and h(x)= x+2. Write q(x)=sqrt x^2+4x+4 as a composition of f, g, h.
Click here to see answer by Edwin McCravy(20054)

Question 530420: Find the center and radius of the circle.
x^2-10x+y^2+2y+17=0
Thank You!
Click here to see answer by Alan3354(69443)

Question 530464: solve for y. 6x+y=4
Click here to see answer by oberobic(2304)

Question 530422: Find the equation of the line that passes through the equation point P and is Parallel to the line L.
P(2,1), L:3x+y=-2
I'm so lost.
Click here to see answer by Edwin McCravy(20054)

Question 530489: I am trying to find the answer for points to do a line graph.
Here is my question.
3x + 4 = 4x =6

I was not sure how to do this.
Thank you for your help.
Sarita
Click here to see answer by jim_thompson5910(35256)

Question 530418: Find the equation of a circle given its center C and one point P.
C(0,4),P(0,0).
Thank You
Click here to see answer by scott8148(6628)

Question 530843: -slove for y in terms of x: -x+2y=6
Click here to see answer by oberobic(2304)

Question 530872: y=-1/2x-5
6x-2y=24
Click here to see answer by oberobic(2304)

Question 530999: (4,-8) (-10,1) write the equation using only interger coefficients
Click here to see answer by oberobic(2304)

Question 531057: c2+11c+18/c+9 the quotient is_____
(c to the 2nd power)
Click here to see answer by jim_thompson5910(35256)

Question 531062: how to write 2x-3y-14=-6 in standard form
Click here to see answer by oberobic(2304)

Question 531520: how do you solve 10a-37=6a+51
Click here to see answer by oberobic(2304)

Question 531737: The blackberry's driveway is difficult to get up in the winter ice and snow because of its slope. what is the equation of the line that represents the Blackberry's driveway?
Click here to see answer by oberobic(2304)

Question 532281: y=x+10x+14
Click here to see answer by oberobic(2304)

Question 532539: complete the ordered pairs,(1,_) and (_,9) so they satisfy the equation y=-9x +18. this is what I have so far
y=-9x+18
-9(1)+18
y=9
I substituted 18 for the y and came up with 18=-9x+18 and got zero, but zero is not an option in the homework. Can anyone show me what I did wrong?
Click here to see answer by Alan3354(69443)

Question 532613: What is the value of the y variable in the solution to the following system of equations?
3x + y = 11
�3x + 2y = 1

Click here to see answer by Alan3354(69443)

Question 532629: Write the equation in the slope-intercept form
m = 4; (3,4)
Click here to see answer by Alan3354(69443)

Question 532633: Write the equation in the slope-intercept form

m = - 1/8 (-16,5)
Click here to see answer by Alan3354(69443)

Question 532632: Write the equation in the slope-intercept form

m = 9 (3,1)
Click here to see answer by Alan3354(69443)

Question 532632: Write the equation in the slope-intercept form

m = 9 (3,1)
Click here to see answer by Edwin McCravy(20054)

Question 532631: Write the equation in the slope-intercept form

m = - 5 (2,7)
Click here to see answer by Alan3354(69443)

Question 532630: Write the equation in the slope-intercept form

m = 4/5 (10,-12)
Click here to see answer by Alan3354(69443)

Question 532695: |x|<=4
Click here to see answer by stanbon(75887)

Question 533097: how do you graph an equation in standard form
Click here to see answer by oberobic(2304)

Question 533108: (1,0) and (-2,3) Find the slope of the line
Click here to see answer by josmiceli(19441)

Question 533121: consider the linear equation y=3x+b.
choose several diffrent positive and negative values for b. graph each equation in the standard viewing window

Click here to see answer by solver91311(24713)

Question 533141: I can't figure out where to even start with this problem. Any help would be greatly appreciated.
It says to solve and put my answer in a solution set.
(x+18)(x-3)(x+15)>0
thanks
Click here to see answer by lwsshak3(11628)

Question 533716: can you help me get the answer for y=-2x
Click here to see answer by unlockmath(1688)

Question 533745: Graph the equation: 5x + y = -5
Click here to see answer by boilpoil(127)

Question 533731: what is x > 0 on a linear graph
Click here to see answer by boilpoil(127)

Question 534038: Find the slope, if it is defined, of each line. If slope is undefined, state this.
The line passes through each of these points (6,1)(4,2)(2,3)(0,4)(-2,5)(-4,6)
I'm new to graphing. Please help me to solve. Must show work.
If possible, need answer before 8p.m.PST 11/18/11 Thanks
Click here to see answer by Alan3354(69443)

Question 534052: I've been trying for hours and I can't figure this out. Please help! I need to find the corner points of a feasible region and graph them.
Click here to see answer by KMST(5328)

Question 533824: I am attempting to write an quadratric equation that has the solutions 10 and 2 and I am coming up empty. I could use some help please.
Click here to see answer by bucky(2189)

Question 534073: Write an equation of a line in standard form (Ax + By = C) that has an undefined slope and passes through point (1,-3).
Click here to see answer by solver91311(24713)

Question 534169: I need to find the intercepts of the graph of the function for this problem
s(p)= 4p2-3p-7
Click here to see answer by oberobic(2304)

Question 534274: write the slope-intercept form of the equation of the line that is perpendicular to 2x-5y=10 and passes through points (2,4)
Click here to see answer by oberobic(2304)

Question 534370: As hard as I try, I have been unable to understand this lesson, much less answer anything correctly. This is an example homework question:
Write an equation of the line containing the given point and perpendicular to the given line. Express your answer in the form of y=mx+b
(2, -6); 8x + 5y = 6
I know that I'm supposed to subtract 8x from both sides (to solve for y), and I am able to complete the first step correctly:
5y = -8x + 6
It then tells me to divide each side by 5 (this is where my answer does not match up with the correct homework answer) and I get:
y = 8 6
- _ x + _
5 5
The correct answer is:
y = 8 29
- __ x - __
5 4

What am I doing wrong???
Click here to see answer by Alan3354(69443)

Question 534385: find the x-intercept and y-intercept
f(x)= x^2+2x+63
Click here to see answer by oberobic(2304)

Question 534393: find the x-intercept and y-intercept
f(x)= -x^2+2x+63
I need the x coordinates of the intercepts
and
the y intercepts (0, )
Click here to see answer by oberobic(2304)

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