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

Tutors Answer Your Questions about Linear-equations (FREE)

Question 92244: Solve the system by graphing.
x � 2y = 8
x + y = �1

Click here to see answer by jim_thompson5910(35256)

Question 92245: Graph f(x) = 4x + 1
Click here to see answer by checkley71(8403)

Question 91890: If the sides of a square are decreased by 2 cm, the area is decreased by 36 cm2. What were the dimensions of the original square?
Click here to see answer by mathispowerful(115)

Question 92429: please help me thank you in advance I really do not understand this problem.
solve the system by graphing
4x + 2y = 10
y=4
Click here to see answer by stanbon(75887)

Question 92431: solve the system by graphing
3x + y = 6
3x - y = 0
Click here to see answer by jim_thompson5910(35256)

Question 92482: City A and City B are 440 miles apart. If Jack leaves city A traveling 50mph and Jill leaves city B traveling 60mph, how long will they travel if they drive toward each other?
Click here to see answer by ankor@dixie-net.com(22740)

Question 92484: Jane has a dress shop. She has space for 200 dresses. She sells only red and blue dresses. After reading several fashion magazines she decides to stock her shelves with 34 more blue dresses than red dresses. How many of each should she stock on her shelves?
Click here to see answer by ankor@dixie-net.com(22740)

Question 91629: I don't understand how to solve this complicated linear equation word problem. I would really appreciate if you could help me out, thanks.
THE SUM OF TWO NUMBERS IS 36. IF THE LARGER NUMBER IS DIVIDED BY THE SMALLER NUMBER, THE QUOTIENT IS 2 AND THE REMAINDER IS 3. FIND THE NUMBERS.
I'm sorry but this isn't a textbook question
Click here to see answer by bucky(2189)

Question 92423: Draw L1 through (-4, 0) and (0,6). What is the slope of any line parallel L1? Draw L2 through the origin and parallel to L1.
Thank you
Click here to see answer by checkley71(8403)

Question 92588: Solve each system by substitution method. Indicate whether each system is independent, inconsistent or dependent.
3y=y+5
3x-9y= -10

and
x=1/8y-1
y=1/4x +39
Click here to see answer by venugopalramana(3286)

Question 92586: Solve each system by addition method. Indicate whether each system is independent, inconsistent or dependent;
x+3(y-1)=11
2(x-y)+8y=28
Click here to see answer by jim_thompson5910(35256)

Question 92602: Find the slope of any line parallel to the line through points (12, 4) and (8, 8).
Click here to see answer by psbhowmick(878)

Question 92659: Find the mean and the median.
�8, �1, 3, 9, 15, 18

Click here to see answer by jim_thompson5910(35256)

Question 92744: 1. Your friend is taking an algebra class that began one week after ours. Explain to your friend how to graph linear inequalities with two variables. Include at least two examples.
Please I need help. I am not understanding these questions. Could you kindly help me. Is there any web sites for graphs. Please help.
Click here to see answer by stanbon(75887)

Question 92782: 36. lines through (-2,0) with slope -3/4.
38. line through (0,9) that is parallel to the line 3x + 5y =15.
40. line through (-2,4) that is perpendicular to the x-axis.
42. slope intercept form. y + 2 = -6 (x-1)
Click here to see answer by checkley75(3666)

Question 92817: Adult tickets for a play cost $20 and child tickets cost $16. If there were 27 people at a performance and the theater collected $646 from ticket sales, how many adults and how many children attended the play?
Click here to see answer by Earlsdon(6294)

Question 92823: find the slope of the line passing through the points (-4,0) and (-4,-2).
Click here to see answer by Earlsdon(6294)

Question 92824: a electronics store wants to order at least 3 times as many DVD players as VHS players. Write an inequality expressing this relationship.
Click here to see answer by checkley75(3666)

Question 92819: Sally bought three chocolate bars and a pack of gum and paid $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00. Find the cost of a chocolate bar and the cost of a pack of gum.
Click here to see answer by checkley75(3666)

Question 92822: An airplane covered 9 miles of its route while decreasing its altitude by 36,000 feet. Find the slope of the airplan's line of descent. Round to the nearest hundredth. {hint: 1 mi=5280 feet}
Click here to see answer by stanbon(75887)

Question 92813: A home-based company produces both hand-knitted scarves and sweaters. The scarves take 2 hrs of labor to produce, and the sweaters take 14 hrs. The labor available is limited to 40 hrs per week, and the total production capacity is 5 times per week. Write a system of inequalities representing this situation, where x is the number of scarves and y is the number of sweaters. Then graph the system of inequalities.
Click here to see answer by ankor@dixie-net.com(22740)

Question 92837: How do you Find the slope and y-intercept of each equation? Then graph.
1.) y=x+2 9.) y=-x-2 17.) y=4/5x+2
2.) y+3=-1/3x 10.) y-6=-2x 18.) y-3/4x=-5
3.) y=2x-1 11.) y=-5x-2 19.) y=-6
4.) y-3/5x=-1 12.) y+x=0 20.) y-3=-2/3x
5.) y=1/2x-4 13.) y+4=2x 21.) y=-7/4x+6
6.) y-2x=-3 14.) y=-5x+5 22.) y+3x=6
7.)y=2/5x+3 15.) y=-4+x 23.) y+1/5x=-2
8.) y+1/3x=-2 16.) y=-4x 24.) y= 3/7x
Please answer these for me. I don't know how to do any of them.

Click here to see answer by checkley75(3666)

Question 92938: In the x,y plane, what is perpendicular to the graph of the linear equation 3x-4y=0
I've done this over and over but i can't figure it out. The answer is supposed to be y=-(4/3)x+12 but i keep getting y=(3/4)x+0. Thank you for your help!
Click here to see answer by scott8148(6628)

Question 92980: solve. 8x-5+9x=17x-5
Click here to see answer by jim_thompson5910(35256)

Question 92981: one recipe calls for 1/4 teaspoon vanilla. A second recipe requires for 1/2 teaspoon vanilla flour, and a third recipe calls for 1/8 teaspoon vanilla. How much vanilla is required to make all three recipes?
Click here to see answer by tutorcecilia(2152)

Question 92954: 1. graph y = 5x - 2
2. graph 3x - 1 = 5x - y
3. graph y = [x] + 3
4. graph x + 2 = 2x - 1
I would like to check your answers against mine.
I don't have my book with me today
Click here to see answer by tutorcecilia(2152)

Question 92815: solve the system by addition or subtitution.
3x-4y=8
6x-2y=10
Click here to see answer by checkley75(3666)

Question 92997: Graph compound or absolute value inequality.
/ X - 3Y/> or = 9
absolute value of x - 3Y is greater than or equal to 9.
Click here to see answer by stanbon(75887)

Question 93018: I am not sure I have worked this problem correctly could you please help?
Solve the system by addition...

-2x + 3y = -15
x - 2y = 11
Thank you for your help.
Click here to see answer by checkley75(3666)

Question 92991: Solve each system b the addition method. Indicate whether it is independent, inconsistent,or dependent.
1/3X-1/6Y=1/3
1/6X+1/4Y=0
Click here to see answer by stanbon(75887)

Question 93081: Graph the inequality:
y<(1/2)x + 1
Click here to see answer by tutorcecilia(2152)

Question 93096: Word Problem
Wild and Crazy Productions wants to purchase a new CD producing machine. Its cost is $5000.00. If their labor and other unit costs are $5.00 per CD and they can sell the CD for $10.00 each, how many must they manufacture before they pay for their new machine?
Click here to see answer by stanbon(75887)

Question 93078: solve and check the linear equation 6x-7+3(x+1)=4x-6
Click here to see answer by tutorcecilia(2152)

Question 93061: Solve line1 y=1/3x
line2 y=13/39x-3
Click here to see answer by checkley75(3666)

Question 93102: 3Y=X+5 3X-9Y= -10
Click here to see answer by tutorcecilia(2152)

Question 93104: Determine the equation of the line described. Put answer in the slope-intercept form, if possible.
Through (-2,-7) parallel to -6x - 5y = 57.
I tried to work through the problem and got the answer y = -6/5x - 23/5. Is that correct?
Thanks so much!!
Click here to see answer by vertciel(183)

Question 93101: Find a general form equation for the line through the pair of points.
(1,4) and (8,-2)
I'm not sure what the general form equation is. Is that the slope intercept form?
Thanks so much!!
Click here to see answer by vertciel(183)

Question 93103: Determine the equation of the line described. Put answer in the slope-intercept form, if possible.
Through (3,4), perpendicular to 7x - 4y = 37
I tried to work out the problem and got y = -4/7x + 40/7. Is that correct?
Thanks so much!!
Click here to see answer by vertciel(183)

Question 93107: Write an equation for the linear function f satisfying the given conditions.
f(3) = 4 and f(0) = 9
I know that these would be looked at as (3,4) and (0,9), but I don't know what type of "equation" they're looking for. Thanks so much!!
Click here to see answer by jim_thompson5910(35256)

Question 93083: y-x> -3
Click here to see answer by tutorcecilia(2152)

Question 93134: x=1/8y-1 y=1/4x+39
Click here to see answer by checkley75(3666)

Question 93170: Homework ditto that was handed out
Given f(x) = 3x + 1, find f(a + 3)
Click here to see answer by mathispowerful(115)

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