Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

Tutors Answer Your Questions about Linear-equations (FREE)

Question 176086: how do you find the slope of a line?
Click here to see answer by Alan3354(69443)

Question 176140: WORLD GRAIN DEMAND:
Freeport McMoRan projects that in 2010 world grain supply will be 1.8 trillion metric tons and the supply will be only 3/4 of world grain demand.
What will world grain demand be in 2010?
Click here to see answer by josmiceli(19441)

Question 176196: please help me solve this question: give the slope of a line perpendicular to the given line y = x-3
Click here to see answer by Fombitz(32388)

Question 176219: heres the problem that my teacher had gave me.
Tara is a musician. She signs a contract with a local lounge to play a show for them on Friday night. The lounge manager agrees to pay $110 to reserve the night,plus an additional $6 for every customer,c,that comes in to hear her show.
Questions:
1.Write an equation that shows how much Tara will earn in total,e,depending on how many customers come to hear her show,c?
2.If 25 customers come,how much will Tara earn in total?
3.If Tara wants to earn at least $500,how many customers will need to attend?
Click here to see answer by solver91311(24713)

Question 176228: A right triangle has legs of lengths 10 and 24. What is the length of the hypotenuse? Round to the nearest tenths.
Click here to see answer by solver91311(24713)

Question 176228: A right triangle has legs of lengths 10 and 24. What is the length of the hypotenuse? Round to the nearest tenths.
Click here to see answer by nerdybill(7384)

Question 176230: A telephone pole is supported by a wire of length x. If the base of the wire "x" is 40 feet from the pole, which is 70 feet tall, what is the length of the wire to the nearest whole number?
Click here to see answer by stanbon(75887)

Question 176225: A right triangle has a hypotenuse equal to 35 and one leg of length 30. Find the length of the other leg to the nearest tenth.
Click here to see answer by Alan3354(69443)

Question 176259: Find the standard form of the equation of the line with slope 3/5 and y-intercept -6.
Click here to see answer by Mathtut(3670)

Question 176259: Find the standard form of the equation of the line with slope 3/5 and y-intercept -6.
Click here to see answer by stanbon(75887)

Question 176276: Describe in words the graph of each of these curves below. Include in your description the shape, along with other possible relevant information such as length, width, and center points.
a. (X+2)2 + (Y-4)2 = 36
b. Y = 3X2
c. Y = X2 + X
d. (X-1)2 + (Y-8)2 = 16

Click here to see answer by stanbon(75887)

Question 176295: 1.Determine the slope that passes through each pair of points.
(-2,-8)(1,4)
2. Write an equation in standard form.
(4,-3) m=2
3. Write an equation in standard form.
(-6,-3)m=1/2

Click here to see answer by EMStelley(208)

Question 176277: Find the equation for each of the following items below:
a. A line that passes through (6,2) and has a slope of 2.
b. A line that passes though the points (2,4) and (8,16)
c. A line that passes through (7,3) and has a slope of -1.
d. A line that passes through (1, 1) and is perpendicular to the line 3x+4Y=12.
e. A circle with a radius of 9 and a midpoint at (3,3)

Click here to see answer by EMStelley(208)

Question 176278: Solve for the following items:
a. The point on the x-axis that is equidistant (equal distance) from (12,6) and (8,2).
b. The distance between the points (6,4) and (18,4).
c. The distance between the points (1,4) and (19,6).
d. The midpoint between (12, 6) and (18, 4)
e. The midpoint between (-6, -8) and (23, 5)

Click here to see answer by EMStelley(208)

Question 176304: a lab technician has a solution of 50% acid and another that is 70% acid. He combines each solution to produce 20 liters of 55% acid solution. Write a system of equations that could be used to solve this problem.
Click here to see answer by Mathtut(3670)

Question 176421: please answer my question: write the equation of a line that passes through (-5,-3)and (7,-3) in slope-intercept form...please answer my question,thankyou
Click here to see answer by jim_thompson5910(35256)

Question 176428: please answer my question: write the equation y-7=-9(x-2) in standard form thankyou
Click here to see answer by jim_thompson5910(35256)

Question 176428: please answer my question: write the equation y-7=-9(x-2) in standard form thankyou
Click here to see answer by MathTherapy(10552)

Question 176280: Write a short paper describing a graph or a series of graphs that would represent a real life situation or problem from your own life. Describe in words what this graph or graphs might look like. I'm trying to do this with how much money on gas I spend. Right now, it's about 1.75 per gallon. I have a 30 gallon truck and 20.00 usually last me about 3 or so days.

Click here to see answer by solver91311(24713)

Question 176469: I need to write an equation in point-slope form for the line through the given point with the given slope. I don't understand.
(0,2);m=4/5
Click here to see answer by EMStelley(208)

Question 176485: Create an equation of a nonlinear function and provide two more examples
Click here to see answer by Mathtut(3670)

Question 176571: 1. Is there a difference between solving a system of equations by the algebraic method and the graphical method? why? Support by examples.
2.Why is true that at x-intercept, the value of y is 0, and at y-intercept, the value of x is 0?
3. By looking at two linear equations, how can you tell that the corresponding lines are parallel?
Click here to see answer by stanbon(75887)

Question 176722: Write an equation.
(-3,0) (0,-4)
I Think the answer is y=-4/3x-4. Am I correct? Thank You for helping me.
Click here to see answer by Mathtut(3670)

Question 176723: Write the standard form of the equation of the line with slope -1 passing through the point (-4,-6). Please Explain. Thank You!
Click here to see answer by checkley75(3666)

Question 176742: I am a bit overwhelmed by the complexity of this question. Please help me to understand and answer the question.
If matrix A is transformed into matrix B by means of an elementary row operation, is there an elementary row operation that transforms B into A?
Click here to see answer by solver91311(24713)

Question 176737: How do I use Gauss-Jordan elimination to solve this linear system and find all solutions?
x + y - 2z = 5
2x + 3y + 4z = 2
So far, I have placed each of the numbers into an augmented matrix. I do not know how to proceed from here.
Click here to see answer by solver91311(24713)

Question 176819: I am having a struggle in determining the slope on a graph and therefore, cannot graph parallel lines.
Can you offer some helpful hints?
Thank you,
kelloggdmk
Click here to see answer by josmiceli(19441)

Question 176857: Can anyone please help me with this problem?
FInd the value of y:
3x-2y=-7
-7x-3y=-22
Click here to see answer by gonzo(654)

Question 176946: Why is it true that any two points satisfying a linear equation will give you the same graph for the line represented by the equation?

Click here to see answer by stanbon(75887)

Question 176953: Would someone be so kind to answer this question for me please. Thank You.
When solving a linear inequality, why do you always solve for y?

Click here to see answer by stanbon(75887)

Question 176886: Can you explain and show how to graph the point-slope form equation y + 5 = -(x - 2). I understand that the (x,y)is my "starting" point and the slope is actually -1/1; however my line is in quadrants 1 and 3 instead of Q 1 & 3. . .what is correct (x,y?) Why is it not (2,5). I.E, if the equation was y - 5 = -2/3 (x + 2),then (2,5) would be correct, right? Thanks in advance for your assistance.
Click here to see answer by ankor@dixie-net.com(22740)

Question 176932: Find the slope of each of the following lines.
1. y = -5x -17

2. 10 = y + x

3. y = 2x - 5

4. 4x + y = 0

5. 3x - 4y + 16

6. -2y - 16 + x

7. y = -11x - 3

8. y = -3x - 14
9. 2y + 2x = 18

10. 6x + 5y = 10

Click here to see answer by checkley75(3666)

Question 177056: how do i solve x=-11y; 15y-21=-2x using substitution?
Click here to see answer by Fombitz(32388)

Question 177055: how do i solve x=-11y; 15y-21=-2x using substitution?
Click here to see answer by ViVI1692(1)

Question 177054: how do i solve y=2x; x+2y=8 using substitution?
Click here to see answer by solver91311(24713)

Question 177053: how do i solve y=2x; x+2y=8 using substitution?
Click here to see answer by checkley75(3666)

Question 177137: Please help me with this question.
1. Gas laws. The volume of a gas is inversely proportional to the pressure on the gas.If the volume is 6 cubic centimeters when the pressure on the gas is 8 kilograms per square centimeter, then what is the volume when the pressure is 12 kilograms per square centimeter?

Click here to see answer by stanbon(75887)

Question 177155: Find the slope of the line (-5,3) and (7,9).
Click here to see answer by stanbon(75887)

Question 177155: Find the slope of the line (-5,3) and (7,9).
Click here to see answer by jim_thompson5910(35256)

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