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

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Question 154964: The expression _r2 gives the area of a circle
with radius r. How many square meters of wheat were
destroyed when an alien ship made a crop circle of diameter
25 meters in the wheat field at the Southwind Ranch?
Round to the nearest tenth. Find _ on your calculator.

Click here to see answer by stanbon(57361)

Question 154991: Hello,
I am trying to graph the following but I been out of school for 15 years can someone please help me.
I trying to graph a polynomial of three terms

6x² - 4xy + 2xy
I really need your help. I am sorry for having to ask someone to help me but I am stuck and I do not remember how to graph.
If you could show me I really would appreciate it.
Thank you so much,
Jackie

Click here to see answer by stanbon(57361)

Question 155009: Write a slope intercept equation for the line parallel to 3x + 2y = 10 passing through the point (-1, -2).
This is how far I got using the formula: y-y1=m(x-x1)
y-(-2)=-3/2(x-(-1)
y+2 =-3/2(x+1)
y+2 =-3/2 + -3/2
y= -3/2 + (-3/2x2)
y= -3/2 + -3/4
Did I go wrong somewhere? Please help, it would be greatly appreciated.

Click here to see answer by oscargut(891)

Question 155036: Find the solution sets of the following simultaneous equations, solving for x and y.
(a) bx+y = a
ax-y = b

Click here to see answer by Fombitz(13828)

Question 155035: Find the values of m and a such that these equations have infinite solution sets.
(i) 4x+my=a
2x+y=4
Click here to see answer by nabla(475)

Question 155038: for what value(s) of p does the equation x^2+px+1=0 have no real solutions, and two real solutions.
Click here to see answer by Fombitz(13828)

Question 155120: We have been studying the system Linear Equations in Three Variables by elimination method of x,y,z and I'm lost. PLEASE help!
x+y+z=4
x-y+2z=1
x-y-3z=-4
Click here to see answer by Edwin McCravy(8909)

Question 155202: Y=2X + 1 . Find the equation for the line that is perpendicular. I don't know where to begin.
Click here to see answer by stanbon(57361)

Question 155204: I just want someone to please review my work to see if i'm on the right page as far as problem solving:
Prob: write a slope intercept equation for the line parallel to 3x + 2y =10, passing thourgh the point (-1, -2)
my answer: 3x + 2y =10
2y= 10-3x
y= 10/2-3/2x
y= 5-3/2x
y= -3/2x + b
-2= -3/2(-1)+ b
-3/2x-2= b
-7/2= b
slope intercept: y= -3/2x-7/2
Click here to see answer by stanbon(57361)

Question 155175: Can you show me how to simplify or solve for "x" in the following equations?
3(x+2)=-2(x+4)

2(x+1)=4-3(2x+1)

2(x+1)-3(x+7)=2

-3.6x+3.1=3(5.2-1.2x)

I would appreciate the help! Thank You =)
Click here to see answer by edjones(7569)

Question 155156: y=2x
Click here to see answer by checkley77(12569)

Question 155328: find the value of m for which the equation has equal roots (m+1)x2+2(m+3)+(m+8)=0
Click here to see answer by oscargut(891)

Question 155359: This is a word problem. I have tried it several different ways and cannot get the right answer. The answer is in the back of the book, but i need to know how to get it. If you could please try and explain that part it would be great.

You are building a walkway of uniform width around a 100 foot by 60 foot swimming pool. After completing the walkway, you want to put a fence along the outer edge of the walkway. You have 450 feet of fencing to enclose the walkway. What is the maximum width of the walkway?
Click here to see answer by oscargut(891)

Question 155382: rewrite the standard form of the equation in slope-intercept form??
1. 2x+5y=2
2. -3x-2y=-5
3. x-2y=4
4. -4x+y=5
detirmine whether the given ordered pair is a solution to the system of equations?
1. (1,-2)
4x+y=2
3x+4y=-5
yes or no
Click here to see answer by checkley77(12569)

Question 155444: I have seen how to solve these equations when solving for y where you make an x any y table start with -2 to 2 and input the numbers to solve the parabola. How do you use that same process for a problem like this?
Find the vertex and intercepts of the function f(x)= x^2 + x - 2

Click here to see answer by oscargut(891)

Question 155541: Find the slope of the given line, if it is defined
y=x+1/6
How do I solve this problem
Click here to see answer by checkley77(12569)

Question 155537: Find the slope of the given line, if it is defined
y=-3/2x+-4
How do I solve this problem
Click here to see answer by checkley77(12569)

Question 155605: use the intercepts to graph the following equation: x-2y=4
Click here to see answer by Alan3354(30993)

Question 155615: 2x+5y=10 Find the x and y-intercepts.
Click here to see answer by jim_thompson5910(28595)

Question 155613: Find slope and y intercept x+2y=4
Click here to see answer by jim_thompson5910(28595)

Question 155631: Find the equation of the line, given the point (−1, −5) and a slope of −8. Use point-slope form.
Click here to see answer by nerdybill(6962)

Question 155622: Can you simplify and graph this equation,
x/9-y/4=1 and explain
Click here to see answer by checkley77(12569)

Question 155651: Tickets for a concert were sold to adults for
$3 and to students for $2. If the total receipts were $824
and twice as many adult tickets as student tickets were
sold, then how many of each were sold?

Click here to see answer by oscargut(891)

Question 155632: Discuss strategies for graphing and solving linear equations in two variables.
Click here to see answer by Alan3354(30993)

Question 155665: A bookshelf is to be constructed. the length is to be 3 times the height. If 60 feet of lumbar is available for the entire unit, find the length and height of the book case.
Click here to see answer by jojo14344(1512)

Question 155668: Find the slope, if any, of this equation:
Click here to see answer by Alan3354(30993)

Question 155668: Find the slope, if any, of this equation:
Click here to see answer by Adam(64)

Question 155656: 3g+h=g for g
Click here to see answer by Alan3354(30993)

Question 155710: x - 4y = -18
3/4 + (1/4)y = x
A(4, -1)
B(-3, 2)
C(-5, 2)
D(2, 5)
E(-2, -4)
FNo Solution

I tried to solve both equations for y:
z=x+18/4
y=4x-3
but when i tried to find which of the solutions choices were correct, i couldnt come to any of them. Im not sure if i solved for y wrong, or what im doing thats incorrect. Id like to kno the correct choice and how to come to it. Thank you!
Click here to see answer by Earlsdon(6287)

Question 155830: 1.Six times a number minus 5 equals 43.what is the number?
2.if 7 is added to half a number the result is 12.what is the number?

Click here to see answer by oscargut(891)

Question 155840: Find the slope and y-intercept of the line. Write fractions in lowest form.
The slope is what?
The y-intercept is what?
4y+5x+4=15+5x
Click here to see answer by stanbon(57361)

Question 155755: x-y=4
Click here to see answer by checkley77(12569)

Question 155914: how do I find all points on the y-axis that are 10 units from the point (-6,3)
Click here to see answer by stanbon(57361)

Question 155909: i have to write an equation for the line containing the indicated points.
(0,0) (3,30)
please help by showing me how to do this!!!!
Click here to see answer by Alan3354(30993)

Question 155961: Write a linear equation relating elapsed time from 6:00 a.m. to temperature.
Click here to see answer by Alan3354(30993)

Question 155986: how do I find slope of a line parallel to the graph of each equation
1) y=4x+2
2) y+2/7x + 1
Click here to see answer by checkley77(12569)

Question 156179: find the equation of the straight line passing through ((2/5),(3/7)) and perpendicular to y+8x=2x+7
Click here to see answer by Alan3354(30993)

Question 156203: how to writ in equation with the given points (2,4) and( 3,5)
Click here to see answer by checkley77(12569)

Question 156255: What is the equation of the line whose slope is -4 and whose y - intercept is 5?
Click here to see answer by oscargut(891)

Question 156312: what is the five step solution to:15-(p-7)+10p=10p-3(p+3)-5
Click here to see answer by Fombitz(13828)

Question 156384: The U.S Postal Service requires that any box sent by Priority Mail have length plus girth totaling no more than 108 in. the maximum volume that meets this condition is contained by a box with a square end 18 in. on each side. What is the length of the box? What is the maximum volume?
Click here to see answer by Earlsdon(6287)

Question 156491: how do you figure out this problem?
5x-5y-13=0
x intercept =
y intercept =
Click here to see answer by stanbon(57361)

Question 156492: I really understand these type of problems, could you help me with this...
find the slope of the line 3x=4y+1
Click here to see answer by Earlsdon(6287)

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