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

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Question 82836: Identify the slope of each direct variation
1. a. y = 7x b.y= -3x c. y= x d. y= 1/2x
e. y= -1.4x f.y= 2.673x g. y= 3 2/3x h. y= -8x
Click here to see answer by funmath(2933)

Question 82825: How do I calculate the slope of a line graph?
Click here to see answer by tutorcecilia(2152)

Question 82754: Find the equation of a line that is perpendicular to 3x+2y=12 and passes through the point (0,2)
Click here to see answer by checkley75(3666)

Question 82873: What is the slope of a line perpendicular to the line passing through (-2,6) and (0,10)?

Click here to see answer by jim_thompson5910(35256)

Question 82879: How do I find the slope of the line passing through the points (1,1) and (3,3)?
Click here to see answer by jim_thompson5910(35256)

Question 82872: What is the equation of the line in slope-intercept form passing through (-5,2) and (2,9)?
Click here to see answer by jim_thompson5910(35256)

Question 82922: Could someone lease help me with my study problem:
Find an equation of a line with slope -3 and through (2, 4)
Thank you very much for your help.
Click here to see answer by jim_thompson5910(35256)

Question 82923: Could a tutor please help me to find an equation that goes through (4,0) and (4,4)
Thank you for your assistance!!
Click here to see answer by stanbon(75887)

Question 82923: Could a tutor please help me to find an equation that goes through (4,0) and (4,4)
Thank you for your assistance!!
Click here to see answer by Edwin McCravy(20054)

Question 82830: write the standard form of the equation:
through (-1,-3) perpendicular to y=-1/5x +5
Click here to see answer by jim_thompson5910(35256)

Question 82925: Could I please have help in graphing...Thank you!
How do I graph this linear equation: 6x-7y=8
Click here to see answer by jim_thompson5910(35256)

Question 82925: Could I please have help in graphing...Thank you!
How do I graph this linear equation: 6x-7y=8
Click here to see answer by stanbon(75887)

Question 82925: Could I please have help in graphing...Thank you!
How do I graph this linear equation: 6x-7y=8
Click here to see answer by chitra(359)

Question 82928: I think I'm getting the hang of it, I used to be terrified of Math, but at the tender age of 48 (smile), I'm making some headway!
Could someone please instruct me on how to graph the linear equation 6x-7y=8
I can't remember if I asked this already..If so please forgive me!!!
Thank you!!
Click here to see answer by Nate(3500)

Question 83033: I need help of the following equation: x + 3y = 4
Click here to see answer by jim_thompson5910(35256)

Question 80383: Solve each of the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.

2x + 3y = 1
5x + 3y = 16

Click here to see answer by ryanman(19)

Question 83028: Solve the following system of linear inequalities by graphing.
x � y < 3
x + 2y >6
Click here to see answer by jim_thompson5910(35256)

Question 83032: I need help, i'm not all that great at the kind of algebra i'm doing. I need three coordinates for the following problem: 2x + -5y = 10.
Click here to see answer by jim_thompson5910(35256)

Question 82996: I need to solve the following system of linear equations:
x-y<=3
x+2y<=6, Can someone please help me with this? I get have way through it and I get confused.
Click here to see answer by jim_thompson5910(35256)

Question 83049: Solve the system by graphing.
x-y=2
x+y=10
Click here to see answer by jim_thompson5910(35256)

Question 83071: What is the slope and y -intercept of the graph.
2x+y=4
Click here to see answer by checkley75(3666)

Question 83063: WORD PROBLEM.....FOOD BUDGET
YOU ARE PLANNING THE MENU FOR YOUR RESTAURANT.EACH EVENING YOU OFFER TWO DIFFERENT MEALS AND HAVE AT LEAST 240 CUSTOMERS.FOR SATURDAY NIGHT YOU PLAN TO OFFER ROAST BEEF AND TERIYAKI.YOU EXPECT THAT FEWER CUSTOMERS WILL ORDER THE CHICKEN .THE ROST BEEF COSTS $5 PER SERVING AND THE CHICKEN COSTS YOU $3 PER SERVING . YOU HAVE A BUDGET OF AT MOST $1200 FOR MEAT FOR SATURDAY NIGHT
THE QUESTION:
WRITE A SYSTEM OF LINER INEQALITIES THAT SHOWS THE VARIOUS NUMBERS OF ROAST BEEF AND TERIYAKI CHICKEN MEANS YOU COULD MAKE FOR SATURDAY NIGHT?
Click here to see answer by stanbon(75887)

Question 83081: What is the equation of the line through (0,9) that is parallel to the line 3x+5y=15?
Click here to see answer by chitra(359)

Question 83081: What is the equation of the line through (0,9) that is parallel to the line 3x+5y=15?
Click here to see answer by rapaljer(4671)

Question 83111: Rewrite each equation in vertex form. Then sketch the graph.
1. a. y=x^2+4x-6
b.y=4x^2+4x+1
c.y=-3x^2+3x-1
d. y=-2x^2+4x+3

e.y=6x^2-12x+1
I dont know how to do these they are really confusing
HELP!!!Please and Thanks
Click here to see answer by jim_thompson5910(35256)

Question 83174: #20
Find an equation in slope-intercept form (where possible) for each line
through (8,-1) and (4,3)
this is what i have so far:
(3-(-1))/(4-8)= (4)/(-4)=-1
so slope is -1
y=mx+b
(8,-1) using
-1= -1(8)+b
-1=-8 +b
-1+8=b
7=b
y = -x+7
is this correct?
Click here to see answer by Mona27(45)

Question 83179: i don't understand what to do with these two equations x+y=-1 and 2x-y=7 the directions say Estimate the solution of the linear system graphically. then check the solution algebraically.
Click here to see answer by checkley75(3666)

Question 83185: i don't understand what to do with these equations 4x+3y=-2 and 3x+2y=-3 . The directions are Solve by linear combinations
Click here to see answer by jim_thompson5910(35256)

Question 83196: write this equation in standard form: y-6=-4/5(x-5)
Click here to see answer by jim_thompson5910(35256)

Question 83173: #38
Find an equation in slope-intercept form (where possible) for each line
Use slopes to show that the square with vertices at (-2,5),(4,5),(4,-1),and
(-2,-1)
has diagonals that are perpendicular.
#32
Find an equation in slope-intercept form (where possible) for each line
Through (-2,6),perpendicular to 2x -3y =5.

Click here to see answer by jim_thompson5910(35256)

Question 83199: Find the slope of the line passing through the points (�1, �7) and (�6, 3).
Click here to see answer by jim_thompson5910(35256)

Question 83200: I wasn't sure where to post this question, so here goes.
The daily low temperatures in degrees Fahrenheit for a certain week were �3, 1, 4, �5, �10. What is the range of low temperatures for that week?
I understand range to be finding the difference between the highest and lowest numbers. The answer would be the range. But the multiple choice answers are 12, 13, 14, or 14 degrees.

Click here to see answer by jim_thompson5910(35256)

Question 83201: These data represent the population of a certain city.
Year Population (in thousands)
1950 18
1960 23
1970 29
1980 32
1990 38
2000 42

(a) Draw a line graph for the data.
(b) Use the line graph to predict the population in the year 2010.

Click here to see answer by checkley75(3666)

Question 83208: Find the Values for m and b in the following system so that solution to the system is (-3,4).
5x+7y=b
mx+y=22
Click here to see answer by ankor@dixie-net.com(22740)

Question 83251: Tutor: Can you please help me find the slope that goes through the following points: 5,4 and 0,5.
Thank you for your help!!
Click here to see answer by jim_thompson5910(35256)

Question 83198: Hello out there,I'm writing for some help with some slope-intercept problems,the first one is,Are the following two graphs in a family?If so/explain why,y=3x-2 and y=-2x+1.The next one is,Are the following two graphs in a family?If so explain why,y=-2x+3 and y=2x+3.The next one is,Change y=x-3 so that the graph of the new equation has a steeper,negative slope the same y-intercept.And the last one is,Write the point-slope form of the line that passes through (3,-3)and(5,1),thanks for whoever can help.
Click here to see answer by jim_thompson5910(35256)

Question 83258: Tutor could you please help me with this problem?
Evaluate each expression, given the replacement values for X. 4X^2; x= -1
thank you very much!!
Click here to see answer by Nate(3500)

Question 83245:
Click here to see answer by prmarella(4)

Question 83117: Determine the linear function whose graph is a line that is perpendicular to the line g(x)=7x+3 and contains the point (5,5).
Click here to see answer by Mona27(45)

Question 83302: Please help
a=1/2bc^2 this is asking to solve for b
thanks for your help
Click here to see answer by adamchapman(301)

Question 83427: I need assistant most deperately, this is asking to evaluate.
2m-5n
____________if m=-2, n-4, and p=-1
n+3p
let me know if this makes sense to you?

Click here to see answer by Earlsdon(6294)

Question 83428: ONE GRAPH WITH POSTIVE SLOPE AND NEGATIVE INTERCEPT,WITH EQUATION FOR THE GRAPH
Click here to see answer by rapaljer(4671)

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