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

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Question 202256: 20 - x/3 = x/2 solve the equation.

Click here to see answer by vleith(2825)

Question 202245: (3,1)
(-4,15)
Click here to see answer by RAY100(1637)

Question 202304: Y-intercept of a line
Find the -intercept of the line whose equation is
y = 0.2 x + 4.7
Y- intercept:___
Click here to see answer by vleith(2825)

Question 202301: complete each ordered pair so that it satisifies the given equation

y=2x+5:(8, ),(-1, ),( ,-1)
Click here to see answer by stanbon(57361)

Question 202311: X- and y-intercepts of a line given the equation in standard form
Find both the -intercept and the -intercept of the line given by the equation

2.6x-2.4y-7.4=0
Round your answers to 2 decimal places.
x- intercept: ____
y- intercept:____
Click here to see answer by rfer(12662)

Question 202302: Graph each equation. Plot at least five points for each equation.
x-2y=6
Click here to see answer by jim_thompson5910(28595)

Question 202426: Write the linear equation x = 1/3 y – 2/3 in standard form.
Click here to see answer by jim_thompson5910(28595)

Question 202465: I know how to find the slope of a line but I am stuck with this equation:
2x-9y=3
Your help would be greatly appreciated.
Thank you - Lori
Click here to see answer by jim_thompson5910(28595)

Question 202565: I have a question using the slope symbol what do you use in place of that for the proper symbol to represent the slope symbol? Thank janet
Click here to see answer by stanbon(57361)

Question 202598: Marginal Revenue. A defense attorney charges her client $4000 plus $120 per hour. The formula R=120n+4000 gives her revenue in dollars for n hours of work? What is her revenue for 100 hours of work? What is her revenue for 101 hours of work? By how much did the one extra hour of work increase the revenue.( the increase in revenue is called marginal revenue for the 101st hour.) please help I can't find the answer to this it confuses me cause I'm thinking that this should be graphed...but I have a similar problem so maybe if i get this one with help i can do the other on my own thank you for taking the time to help me.
Click here to see answer by stanbon(57361)

Question 202749: 1. 2x-4y=6+x (2) x=4x-2y (3) 2y-4x=16-x
Click here to see answer by jsmallt9(3296)

Question 202601: solve and check-
x+2/2-x/3=5

Click here to see answer by jsmallt9(3296)

Question 202782: Graph y = 3x – 5
Click here to see answer by jim_thompson5910(28595)

Question 202812: I need to know why this equation was written the way it is
The sum of three consecutive numbers is 138.
what is the greatest number 52 50 48 46 44
On the answer sheet they say this let x,(x+2)+(x+4)=138
I know what the answer is it's 48 But how did they determine that the equation
should be written using the numbers 2 and 4 what process determined that.
Click here to see answer by jim_thompson5910(28595)

Question 202834: The equation of the line that contains the point (-4, -10) and is perpendicular to the line that contains the points (-3, 6)and (3, 12) is?
a. Y= x+9
b. Y= -x-14
c. Y= -x+9
d. Y= 16x+54
Click here to see answer by PRMath(123)

Question 202982: y=7..... find the slope of each line how do u do that
Click here to see answer by stanbon(57361)

Question 202982: y=7..... find the slope of each line how do u do that
Click here to see answer by PRMath(123)

Question 203000: What are the x-intercept and y-intercept of a linear equation?
What are their coordinates on a graph?
How can they be used to graph a line?
Demonstrate by determining the intercepts of "6x + 9y = 18”
Click here to see answer by rfer(12662)

Question 203013: What is the equation for the line which contains the point (3,-1)
Click here to see answer by solver91311(16897)

Question 203012: Two perpendicular lines intersect on the x-axis. The equation of one line is 3x-5y+6=0. What is the equation of the other line?
Click here to see answer by solver91311(16897)

Question 203028: I am so confused!
From the given polynomials, identify the polynomials of degree one.
a. 11y2 – 5 – 4y
b. (3x2)1/2 + 12
c. 7 – (12)1/2x
d. 2x + 13x2
e. 5x + 7y + 8
f. (12)1x1
g. x3 + 2x - 10
h. 3x + 4x - 4
Solve the following:
i. 2x = -3x + 9
ii. 3x/5 = -6
iii. y/4 + 2 = 7
iv. 16 = -2x/3
v. Find f(1) for f(x) = 2x3 - 3x2 + x – 21
vi. A function gives the value of C as 2 × (22/7) × r. Find C when r = 7 cm and r = 91 cm.

Click here to see answer by Theo(3464)

Question 203025: If f(x)=-3x^4+x^10-x^7-23, then the largest amount of zeros(including multilicities) that f could have is: 4,10,7,or 21? thanks.
Click here to see answer by vleith(2825)

Question 203009: 1/5(2x+5)=x+2/3

Click here to see answer by RAY100(1637)

Question 203027: 47. A train leaves kansas city, kansas, and travels north at 85 km per hr. Another train leaves at the same time and travels south at 95 km per hr. How long will it take before they are 315 km apart?
53. Two cars start from towns 400 mi apart and travel toward each other. They meet after 4 hours. Find the speed of each car if one travels 20 mph faster htan the other.
Thank you so much. Like I said in my other questions, I can do the problem once it is set up but I have a hard time translating word problems into math problems. Thank you again for your time.
Click here to see answer by checkley77(12569)

Question 203026: I recently asked this question but forgot to put all the info(sorry).
33. Crystal owns and operates a gourmet tea and coffee shop. Monica, who is one of Crystal's best customer, wants to buy two kinds of beans: Arabian Mocha and Colombian Decaf. If she wants twice as much Mocha as Decaf, how much of each can she buy for a total of $87.50?
Colombian Decaf = 8.00/lb
Arabian Mocha = 8.50/lb
Thank you.
Click here to see answer by rfer(12662)

Question 203216: Text book Dugopolski, M. (2009). Elementary and intermediate algebra (3rd ed.) New York: McGraw-Hill
Chapter 2

equations involving decimals.
solve the equation by eliminating the decimal numbers 0.08t +28.3 = 0.5t - 9.5
consecutive integers.
Four consecutive odd integers have a sum of 120. what are the integers?
I know that -60, -40, and -20 equals 120. would the worked out answer be:
x, (x+1) + (x+2) + (x + 3) = 120
4x + 4 = 120 combine like terms
4x = 116 subtract 4 from each side
x = 29 divide each side by 4
x + 1 = -30 if x = 29, then x + 1 is 30 and x + 2 = 31 The problem at this point is not making sense.

Click here to see answer by Earlsdon(6287)

Question 203308: 1. How do we write the equation of a horizontal line? What would be an example?
2. How do we write the equation of a vertical line? What would be an example?
3. The points (1, 3), (2, 5), (8, 17), (50, 101), and (1000, 2001) all lie on line M.
The points (1, -1), (2, -3), (8, -15), (50, -99), and (1000, -1999) all lie on line N.
a. Form the equations of both the lines. Show your work.
b. What are the co-ordinates of the point of intersection of lines M and N?
c. Write the co-ordinates of the intersections of lines M and N with the x-axis.
d. Write the co-ordinates of the intersection of lines M and N with the y-axis.

Click here to see answer by Earlsdon(6287)

Question 203352: 6x-3y+12=0 what is the slope
Click here to see answer by Earlsdon(6287)

Question 203439: Write a general linear equation for the line through the two points (0,0) and (2,3).
Click here to see answer by nerdybill(6961)

Question 203469: Write a general linear equation for the line through the two points (-2,0) and (-2,-2).
Click here to see answer by checkley77(12569)

Question 203484: Fence Painting. Darren and Douglas must paint the 792-foot fence that encircles their family home. Because Darren is older, he has agreed to paint 20% more than Douglas. How much of the fence will each boy paint?
didnt know if this went through or not however this 1 of the 4 word problems i have to do pls assist it might make the others easier to understand and get thank you
Click here to see answer by rfer(12662)

Question 203497: hai.. can you tell me what is intercept form?? and the formula??.. tnx
Click here to see answer by stanbon(57361)

Question 203529: 5x - 2y = 0 and
2x + 5y -21 = 0
Solution: x = 7.2414, y = 2.8965
What work and steps would I use to find the solution?

Click here to see answer by RAY100(1637)

Question 203594: What is the algebra formula if I invest into an ordinary annuity where $1100 is deposited each year into an account that earns 4.8% interest compounded annually
Click here to see answer by Theo(3464)

Question 203593: I will invest $5000 in a savings account at 6.6% interest compounded monthly for 6 years, How would I write the algebra formula for this?
Click here to see answer by stanbon(57361)

Question 203642: the following is known about three numbers: if the second number is subtracted from the sum of the first number and 5 times the third number, the result is -7. the third number plus 5 times the first number is -1. the first number plus 3 times the second number plus the third number is 5. find the three numbers.
[hint: let x represent the first number, y the second number, and z the third number. use the given conditions to write and solve a system of equations.]
Click here to see answer by stanbon(57361)

Question 203720: f(6)=-1,f(3)=8
Click here to see answer by RAY100(1637)

Question 203813: the phoenix suns won two more than three times as many games as they lost. the sun played 82 games. how many wins and losses did the team have.
Click here to see answer by rfer(12662)

Question 203891: Solve 5x+4y=12 for y
When graphed, this equation would be a line. By examining your answer, what is the slope and y-intercept of this line? And the corresponding value of y when x=16.
Click here to see answer by jojo14344(1512)

Question 203892: Help, Help, Help, I'm not understanding the problem. will you please help me figure it out.
given order pairs (points) of (-4, -2) and (-1, -5), develop an equation in the slope intercept format.
Click here to see answer by vleith(2825)

Question 203906: I really dont understand how do you get the slope y=-5x+2? What formula do you use? I was told the slope would be -5/1 but i dont understand how that is the answer?
Click here to see answer by scott8148(6628)

Question 203949: Find the slope of (2,4) and (4,8)
Click here to see answer by RAY100(1637)

Question 203999: Determine whether the following lines are parallel, perpendicular, or neither.
6x − 9y = 12
4x − 6y = 18

Click here to see answer by jojo14344(1512)

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