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

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Question 961005: A line's slope is 5/7, and a point on the line is (0,0). Graph the line.
Click here to see answer by harpazo(655)

Question 961053: y=4-x^2
Click here to see answer by Alan3354(69443)

Question 961155: since my eng not good ,I have try to work this math lab question on my own. I need some help, Please let me if I did it correctly or need to fix it.

Question:
The school raised $1518.75 by charging an adult $3.75 and a student $2.50.
The total attendance was 520. How many adult and how many students attended?
a. write a linear system to model this situation.
b. express each equation in slope-interccept form and graph each line.
c. determine this coordinates of the point of intersection of the line.
d. how to verify the solution in step C by using tables of values?
e. verify your solution by using the data in the given problem.
f. how can you use your results to determine the number of adults and the number of student who attended the carnival ?

my ans:
a)
x= # of adult
y=# of student
x+y=520
3.75x+2.50y=1518.75
b)
y=mx+b
x+y=520
y=520-x
3.75x+2.50y=1518.75
2.50y=-3.75x+1518.75
y=-3.75/2.50x +1518.75/2.50
y=1.5x +607.5 ***( it's correct if is not whole number ?) I couldn't graph this ***

Click here to see answer by rothauserc(4718)

Question 961243: Find the y- intercept of the line whose equation is
Y=-0.7x+6.1
Click here to see answer by Alan3354(69443)

Question 961255: How do u do y-3=0 looking for the :-/ intercept?
Click here to see answer by Edwin McCravy(20055)

Question 961255: How do u do y-3=0 looking for the :-/ intercept?
Click here to see answer by MathLover1(20849)

Question 961398: Find the slope of the line that goes through the given points.
(-2, -6), (-9, -17)
Click here to see answer by josmiceli(19441)

Question 961293: Hi! Could you please help me? I don't understand. This is the question.
Mahesha has $100 altogether, in $10 bills and $5 bills.
a) Copy and fill in the table of values to show at least five possible
combinations of $10 bills and $5 bills that Mahesha may have. Add
columns to the table if necessary.
Number of $10 Bills
Number of $5 Bills
b) Draw a graph of the data. Does the relationship appear linear? Explain.
c) Is it possible for Mahesha to have 19 $5 bills? Explain.
Click here to see answer by stanbon(75887)

Question 961450: x-y= -15

how do you solve this. Please help
Click here to see answer by Fombitz(32388)

Question 961450: x-y= -15

how do you solve this. Please help
Click here to see answer by addingup(3677)

Question 961448: If -4j > 24, then j < -6
Click here to see answer by Fombitz(32388)

Question 961528: I am trying to solve by addition but my answers are wrong. Can you help me solve this equation by addition? I tried multiplying the first equation by 2 but it didn't work.
2x-4y=11
-4x+8y=-22
Click here to see answer by Alan3354(69443)

Question 961558: I have tried to find the solution by addition for this equation but my answer comes up wrong. The answer key lets me know that it is dependent but I don't see how. Can you help me?
Here is the problem:
2x-4y=11
-4x+8y=-22
Click here to see answer by stanbon(75887)

Question 961649: Solve this equation:
-3(2n - 5) 2(n + 6)
________ = 6 + ________
6 3
- by the way this " ________" is a division bar. Thanks
Click here to see answer by josgarithmetic(39617)

Question 961658: i need your help 2x^2 -3x -2<=0 ?
my answer is -0.5 <= x <= 2
but the answer key is 0.5 <= x <= 2
My answer or the answer key is wrong ?
thx
Click here to see answer by Theo(13342)

Question 961644: Which one is a linear equation?
Select one:
a. 7x
b. 4x+2-6^x4
c. -3+2x^2+5
d. x^3+2x^2+5
Click here to see answer by Theo(13342)

Question 961529: Find three ordered pairs that satisfy the equation; 4x +2y = 8.
Click here to see answer by Fombitz(32388)

Question 961695: Which is the equation in slope-intercept form for the line that passes through (6, 16) and is perpendicular to 2x + 5y = 4?
Click here to see answer by Fombitz(32388)

Question 961713: I have been trying to do this problem for 45 min and can't seem to get it. I'm solving by addition and i've tried to the variable but to no avail. If you could help me with this, I'd appreciate it.
The problem is:
4y=3x-13
6x+5y=52
I rewrote the problem to look like this:
3x-4y=13
6x+5y=52
But when I try to isolate a variable x or y my answer is wrong.
Click here to see answer by Fombitz(32388)

Question 961590: I'm stuck. This problem is not coming out for me. I need help.
4y=3x-13
6x+5y=52
Click here to see answer by EdenWolf(517)

Question 961405: What is the slope of the line that contains the points (-3, -2) and (4, -2)?
Click here to see answer by EdenWolf(517)

Question 952561: derive the equation of the line with a slope of -3 and a y intercept of 4
Click here to see answer by EdenWolf(517)

Question 961999: Solve the following for the variable y:
a. 3y = 12
b.xyz=c
c. 3xy = G
d. c=ayb
Click here to see answer by checkley77(12844)

Question 961970: Write the equation of the linear function g(x), for a line passing through (2,-5) and (1,3)
Click here to see answer by Alan3354(69443)

Question 962152: please help me in this, find the slope between (8,-2) and (7,-2)..thank you
Click here to see answer by Alan3354(69443)

Question 962190: solve by addition method (elimination).
5x + 2y = -17
3x -2y = -7

Click here to see answer by amarjeeth123(569)

Question 962420: Solve by the addition method (elimination)
2x - 4y = 24
3x + 5y = 14
Click here to see answer by hkwu(60)

Question 962420: Solve by the addition method (elimination)
2x - 4y = 24
3x + 5y = 14
Click here to see answer by MathTherapy(10552)

Question 962529: If x = - 11, then would the slope be zero and y- intercept be zero as well?
Click here to see answer by stanbon(75887)

Question 962527: If y = -11then the slope would be zero and y intercept zero also?
Given line is y= x-3 then the slope of a perpendicular line would be -1/x ?
Click here to see answer by stanbon(75887)

Question 962533: Find value of x and y so that line through the points has the given slope: (x,0); (-3,6) ; slope: 6/5
Click here to see answer by hkwu(60)

Question 962697: (-14, 16) and (-2, -14) find slpe
Click here to see answer by josmiceli(19441)

Question 962701: What are the x and y intercepts of the equation y= 1/4X?
Click here to see answer by Alan3354(69443)

Question 960303: Graph the following lines, and label x and y intercepts. y = - x - 6
Click here to see answer by EdenWolf(517)

Question 962889: What is the equation of a line that is parallel to y=4x -3 and goes through the point (0,10)
Click here to see answer by MathLover1(20849)

Question 962968: standard form of points (5,1) and (-2,3)
Click here to see answer by Fombitz(32388)

Question 963196: what is the slope of the line that contains (-3,5,) and (-5,6)
Click here to see answer by rfer(16322)

Question 963002: The sum of two numbers is 8. Let x and y represent the two numbers. Write an equation that relates x and y
Click here to see answer by EdenWolf(517)

Question 963396: A line passes through the points (-10,-4) and(-1,2) .
What is the slope of the line that passes through the two points?

Click here to see answer by josmiceli(19441)

Question 963393: A line passes through the points (-10,-4) and(-1,2) .
What is the y-intercept of the line?

Click here to see answer by josgarithmetic(39617)

Question 963409: write the slope-intercept form of the equation of each line given the slope and y-intercept.
slope= -7/3, Y-intercept= -3
Click here to see answer by macston(5194)

Question 963417: find the slope of a line parallel to each given line.
7x + 7y = 20
Click here to see answer by macston(5194)

Question 963489: needing help to find out the slope of C(12,8)AND A(1,2)=
Click here to see answer by Fombitz(32388)

Question 963576: Write the slope intercept form of an equation for a line that passes through the point with the given slope.
(-4,2) slope = -8
Click here to see answer by Alan3354(69443)

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