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

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Question 556283: Determine the equation of the normal to the curve representing the function f (x) = 3sqrt (x), to the point where x = 9.
thank you
Click here to see answer by Alan3354(31538)

Question 556339: Graph the equation 5x+2y=10. Solve for y. Thanks ya'll.
Click here to see answer by jim_thompson5910(28717)

Question 556697: You decide to drive across the country to visit your aunt in California. The number of miles (m) you travel each day varies directly with the number of hours (h) you drive that day. On the first day, you drive for 9 hours and cover 405 miles.
Write the direct variation equation expressing miles in terms of hours. Use the letters m, k, and h only.
Click here to see answer by richard1234(5390)

Question 556525: Architects often use the equation x+y=18 to determine the height y, in inches, of the riser of a step when the tread is x inches wide. Express the slope of the stairs designed with this equation without using the variable y.
Please help me on this.
Thank you
Click here to see answer by richard1234(5390)

Question 556993: How do you graph and identify the y-intercept?
2y+5x=-2
Click here to see answer by stanbon(57984)

Question 557094: y= -3
graph the equation by plotting points
Click here to see answer by Theo(3504)

Question 557100: What is the solution (in interval notation) to the following inequality below?
-10 ≤ x + 6

Click here to see answer by Theo(3504)

Question 557100: What is the solution (in interval notation) to the following inequality below?
-10 ≤ x + 6

Click here to see answer by bucky(2189)

Question 557096: 0.03x + 0.06y=120
graph the equation by plotting points...be sure to find and show x and y intercepts.
Click here to see answer by bucky(2189)

Question 557119: Find three ordered pairs that satisfy the equation.
y=x+6
(0, __), (__, 7), (2, __)
Click here to see answer by stanbon(57984)

Question 557185: You live in Marquez, New Mexico, which has approximate latitude-longitude coordinates of (35N, 107W) and your friend lives in St. Paul, Minnesota, with coordinates (44N, 93W). You plan to meet halfway between the two cities. Find the coordinates of the halfway point.
I am struggling with this. Can someone help me please? Thanks
Click here to see answer by ankor@dixie-net.com(15747)

Question 557713: How do I graph (1,9) and (2,9)?
Click here to see answer by bucky(2189)

Question 557727: find the slope of y=+5-7
Click here to see answer by kkasko(46)

Question 557742: Using the distance formula and the Pythagorean theorem, determine whether the following set of points could be vertices of a right triangle: (-4,5), (6,1) and (-8, -5). I tried using the distance formula and the Pythagorean theorem. I figured out was what the length of the hypotenuse is (I think), but I don't know what to do next. I am confused by the fact that I have 3 sets of numbers (or 6 total numbers) and the formula only needs 2 sets (4 total).
Click here to see answer by Theo(3504)

Question 557956: Please help me find the x intercept and graph for
Click here to see answer by Alan3354(31538)

Question 557982: I need some help with this equation! -3t ≥ -t+3+9t
Click here to see answer by josmiceli(9819)

Question 557982: I need some help with this equation! -3t ≥ -t+3+9t
Click here to see answer by solver91311(17077)

Question 557968: I'm stuck with this one question. This is pretty much the only part of the course that i seem to be struggling with. Pretty much done after this. Hopefully someone could give me some direction with this question

Create a table of values for each of the following functions: y=3x,y=3x^2, and y=3^x use the values of x from 0 to 5
graph the three functions on the same set of axes. clearly identify each function with the corresponding equation.
Click here to see answer by Theo(3504)

Question 558167: how to solve equations

Click here to see answer by rapaljer(4667)

Question 558278: Hi! I need help with graphing this equation -x - 2y = 6
Click here to see answer by KMST(1936)

Question 558357: x^2+y-9=0
Click here to see answer by Alan3354(31538)

Question 558401: whats the answer to 3y+5=7??
Click here to see answer by rfer(12731)

Question 558401: whats the answer to 3y+5=7??
Click here to see answer by Alan3354(31538)

Question 559350: hello, i have a question. solve the inequalities s + 1 is greater or less than 10
Click here to see answer by richard1234(5390)

Question 559409: I don't understand solving equations. The problem is:
3x+2y= -9
-10x+5y= -5

Click here to see answer by mananth(12270)

Question 559412: I need help please! I don't understand this. The problem is:
7x+2y= 10
-7x+y= -16
Click here to see answer by mananth(12270)

Question 559414: Please help! I don't understand! The problem is:
y=6x-4
y=-2x+28
Click here to see answer by ankor@dixie-net.com(15747)

Question 559470: How do u graph Y=3x+5
Click here to see answer by Alan3354(31538)

Question 559671: write a rule for linear functions with graphs containing the foollowing pairs of points.
(-6,4) and (3,-8)
Click here to see answer by Earlsdon(6294)

Question 559752: Hi, I need help with my homework questions. My HW is Graphing Linear Equations I have to find the intercepts.
Problem 1:
4x-3y=12
My instructor wants us to let x=0, and solve for y, then let y=0, and solve for x. Then choose another x value, and solve for y to get a third point.
Click here to see answer by Alan3354(31538)

Question 559616: What is the x and y intercepts of this equation 9x-6=-72
Click here to see answer by ankor@dixie-net.com(15747)

Question 559811: -5x+4y=20
how to graph this
Click here to see answer by mananth(12270)

Question 559913: How do you find the slope of a perpendicular line? A parallel line?
Click here to see answer by richard1234(5390)

Question 559953: Graph the system of equations y=x-2 x-y=4
Click here to see answer by TutorDelphia(193)

Question 559958: How do you graph the equation: -5x+3y=2
How do you graph the equation: y=-7
How do you graph the equation: -3y-2x=9
How do you graph the equation: x=8
How do you graph the equation: 4y-6x=0
How do you graph the equation: 3=-x
How do you graph the equation: 2y+5=-3
Click here to see answer by Alan3354(31538)

Question 560038: I can't believe I don't remember this...old age LOL I thought I had the answer but I guess not. The equation is:
123 - x = 118
1+Y = 16
X:Y = ?
Click here to see answer by Maths68(1474)

Question 560111: How do you graph 5x+4y>18 ? i have done a chart with the "x" coordinate values of (0,2,4,6) but im having trouble finding the "y" value for the expression. So far I have the coordinates (0,4.5),(2,2),(4,-.5) and (6,-3) is this right?
Click here to see answer by stanbon(57984)

Question 560124: Find the Tangent line of the curve.
xy+4x-3y=0 at the point p(1,2).
Click here to see answer by Alan3354(31538)

Question 560102: if a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this.
9x − 2y = 3,
3x − 6 = y

Click here to see answer by fcabanski(889)

Question 560127: Find the tangent line of the curve
x^3+y^2=9 at the point P(2,1).
Click here to see answer by richard1234(5390)

Question 560229: please help step by step
(2x-3)/6+x=(2x-3)/2+5
Click here to see answer by Maths68(1474)

Question 560543: y-4=3/5(x-2)
How do i graph this, or solve it ? im so confused if you could help it would be greatly apreciated. ! please, and thankss .
Click here to see answer by mananth(12270)

Question 560682: if the slope of a line is 13000, and the given x coordinate is 16, what is the y coordinate?
Click here to see answer by jim_thompson5910(28717)

Question 560721: what is y=3/4*1+4
Click here to see answer by jim_thompson5910(28717)

Question 560806: how do I find the slope and y intercept of y=-1/7x-7/8
Click here to see answer by jim_thompson5910(28717)

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