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

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Question 256226: with gas selling for $1.90 per gallon, the cost of filling your tank varies directly with the amount of gas that you pump. Find the equation representing the cost C related to the gallons of gas G that one would need. what is the constant of variation here? why is this a different constant in different areas of our country and across the world?
Click here to see answer by richwmiller(9135)

Question 256190: This is linear equations in one variable and problem solving.
A falcon,when diving, can travel five times as fast as apheasant's top speed. if the total speeds for these two birds is 222 miles per hour, find the fastest speed of the falcon and the fastes speed of the pheasant.
I am unable to figure out how to write the problem out.
Click here to see answer by solver91311(16885)

Question 256257: I need to find the point slope form of the line with the following coordinates (5, -3), (0, -11).
This is what i have so far
y-(-3)= 8/5(x-5)
y+3 = 8/5x -8
is that correct
Click here to see answer by richwmiller(9135)

Question 256270: I'm not sure if this is linear equations but I didn't see elimination
-3y + 4y = 12
2x + y = -8
Click here to see answer by richwmiller(9135)

Question 256274: find the equation of a line that is perpindicular to the line 3x+2y=12 and passes through the point (-1,1)
Click here to see answer by Greenfinch(383)

Question 256323: How do I write an equation for a line that passes through points (-3,5) and is parallel to a line with the equation of (y=-2x+3)?
Click here to see answer by scott8148(6628)

Question 256359: what's the slope intercept form for 9x+ 7y-63=0?
Click here to see answer by Fombitz(13828)

Question 256465: When graphing how can I determine if two lines are perpendicular.
Click here to see answer by richwmiller(9135)

Question 256422: three families A, B & C share 495 kg rice. B gets twice as much as A and C gets thrice as much as B. how much does each family gets?
Click here to see answer by richwmiller(9135)

Question 255775: what is the slope of (-5,4),m=-4?
Click here to see answer by Alan3354(30993)

Question 256522: My problem is m=7,(4,1) I tied to solve a similar one which was
m=8,(7,5) and here is what I did.
y-5=m(x-x1)
y-5=(8)(x-x1)
y-5=(8)(x-(7)
y-5=8(x+7)
y-5=8x-14
y=8x-9
however something went wrong because the answer was 8x-51 and I have no idea how to do this problem. Please help me.
Click here to see answer by Alan3354(30993)

Question 256582: What is the x-intercept of the graph of y=3x-6?
Click here to see answer by richwmiller(9135)

Question 256614: Please help me with this problem.
(7,8);x+7y=6
I have been working on these checkpoint questions for 6 hrs. now and I am so lost. Please help me.
Click here to see answer by Alan3354(30993)

Question 256631: sorry about before, here is the full question.
write an equation of the line containing the given point and parallel to the given line. Express your answer in the form y=mx+b
(7,8);x+7y=6
Click here to see answer by drk(1908)

Question 256647: Non Linear equation
F (x) = x3-5
inputs 5 and 9
Click here to see answer by drk(1908)

Question 256235: This is seventh grade math, inverse operations. I know the function for linear equations is y=k/x . the question I am having trouble with is exactly as written: f(x)=4/x graph the inverse variation function. what is "f" ? I know I have to come up with examples using the function to graph the annswers. Please help me step by step.
Click here to see answer by ankor@dixie-net.com(15651)

Question 256540: help me solve this problem 2y-4x+1=0
Click here to see answer by checkley77(12569)

Question 256670: Write an equation of the line containing the given point and parallel to the given line. Expess you answer in the form y=mx+b. (-7,7);4x=3y+7
I am trying to understand this problem, I tried to plug these numbers into my last problem, however I do not understand how you came up with some of the numbers, so it is not working for me. Please let me know how you get each number in particular when you find what b=. Thank you so much, how much would you charge to help me with the final?
Click here to see answer by stanbon(57342)

Question 256695: write an equation of the line containing the given point and perpendicular to the given line. Type your answer in the form y=mx+b simplify your answer.
(9,-9);5x+2y=3 I do not understand how to do any of these problems, please help before I fail.
Click here to see answer by Alan3354(30993)

Question 256708: write an equation of the line containing the given point and perpendicular to the given line. Type your answer in the form y=mx+b simplify your answer.
(9,-9);5x+2y=3 I do not understand how to do any of these problems, please help before I fail.
Click here to see answer by scott8148(6628)

Question 256716: can you help me find the slope passing through the points (1,-1),(1,3)
Click here to see answer by richwmiller(9135)

Question 256757: find value of k so that line (2+k)x=(2-k)y=15 has slope 3/2

Click here to see answer by nerdybill(6958)

Question 256766: write each equation in standard form and give the values of A, B, and C.
x/5=y/3

I am confused how to solve this problem using the above requirements.
Click here to see answer by Fombitz(13828)

Question 256830: Graph the equation and indentify the y-intercept.
y=1/4x
Click here to see answer by checkley77(12569)

Question 256836: Graph the equation and identify the y-intercept.
y + x= -5
Click here to see answer by richwmiller(9135)

Question 256847: going into the final exam, which will count as two thirds of the final grade. mike has test scores of 86, 80,84, and 90. what score does mike need on the final in order to earn a B, which requires an average score of 80? what does he need to earn an A, which requires an average of 90?
Click here to see answer by richwmiller(9135)

Question 256936: dont know if im in the right place direct me if im not but.. wut is
At a pet store, Rhonda paid $11.50 for 3 dog bowls and 4 bones. Kelly paid $13 for 2 dog bowls and 8 bones. How much will Andrew pay for 4 dog bowls and 2 dog bowls
this is wut i got so far
$11.50 = 3 dog bowls + 4 bones
$13 = 2 dog bowls + 8 bones
? = 4 dog bones + 2 bones
walk thrue if you can plz

thank you ahead of time
Click here to see answer by checkley77(12569)

Question 256948: i dont understand 2x-3=y could you please explain
Click here to see answer by MRperkins(300)

Question 257005: write y=1/2x + 7/4 in standard form
i did this :
y=1/2x + 7/4 then i subtracted 1/2x from both sides .
the i had this : -1/2x + y = 7/4
then i multiplied 2 for everything .
and got this :
-x + 2y = 14
is this answer correct?
Click here to see answer by solver91311(16885)

Question 257091: how do you solve
x-4y=8
Click here to see answer by solver91311(16885)

Question 257099: What is the equation of the line through (-2,-3)with an undefined slope?
Same question but with a slope of 0?
Click here to see answer by drk(1908)

Question 257108: write an equation in slope intercept form of the line that passes through (0,5) and (-3,-4)
Click here to see answer by palanisamy(496)

Question 256895: Media services charges $40 for a phone and $30/month for its economy plan.
Find a model that determines the total cost C(t) of operating a media services phone for t months.
C(t)= 30t+40 This is as far as I got.
Use the model to find the total cost for 10 months of service. Total cost =$
Thank you so much.
Click here to see answer by ankor@dixie-net.com(15651)

Question 257235: A line through the points (m, -9) and (7, m) has slope m. What is the value of m?
Click here to see answer by nerdybill(6958)

Question 257254: what is the slope and y intercept of 5x=9y+81?
Click here to see answer by unlockmath(1599)

Question 257262: what is the slope and y intercept of 9x=8y+48?
Click here to see answer by Alan3354(30993)

Question 257231: If the line that passes through the points A(2,-1) and B(3,-2) is parallel to the line ax – by + c = 0, then determine the value of a^2 – b^2.
Click here to see answer by Alan3354(30993)

Question 257270: what is the slope and y intercept of 6-1/3=7x?
Click here to see answer by Alan3354(30993)

Question 257249: the sides of paralelograms are x+y+1, x+2, 3x-4, 2y-x. find x and y and also find the perimeter of paralellogram.
Click here to see answer by richwmiller(9135)

Question 257249: the sides of paralelograms are x+y+1, x+2, 3x-4, 2y-x. find x and y and also find the perimeter of paralellogram.
Click here to see answer by CharlesG2(828)

Question 257130: write an equation for the line with slope 4.2 and y-intercept (0, 3.4)
Click here to see answer by ankor@dixie-net.com(15651)

Question 257299: solve the following system of equations for x and y
y=2+6x
y=20-3x
Click here to see answer by Fombitz(13828)

Question 257326: L+E=120 domain is 20,30,45,60
Click here to see answer by drk(1908)

Question 257125: 4x+2y=14
7x-3y=-8
Click here to see answer by Fombitz(13828)

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