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

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Question 51794: Suppose the sales of a particular brand of appliances satisfy the relationship:
S(x) = 140x + 100
where S(x) represents the number of sales in year x, with x = 0 corresponding to 1982. Find the number of sales in 1987
Click here to see answer by Nate(3500)

Question 51847: One number is 3 less than another. Their sum is 15. Find the numbers.
Click here to see answer by checkley71(8403)

Question 51864: I'm having trouble with a word problem. It is a Number Problem, You have $30 in change in your drawer, consisting of dimes and quarters. write an inequity that shows the different number of coins in your drawer. I hinestly do do not know even where to begin. Please Help.
Click here to see answer by AnlytcPhil(1277)

Question 51822: using a phone card to make a long distance call costs a flat fee of $0.75 plus $0.25 per minute. What is an equation of the form y=mx +b for this situation, assuming y represents the total cost of calling for x minutes? How much does it cost to talk for 5 minutes?
Click here to see answer by funmath(2925)

Question 51924: hello.
Please help me.
w - 5/2 - w + 2/3 = -2
I am multiplying both sides by 6. I am getting -1. However, when I plug -1 in for w, the sides are not equal.
thank you
Click here to see answer by tutorcecilia(2152)

Question 51995: find a slope of (3,6) and (2,5)
Click here to see answer by checkley71(8403)

Question 52071: 6y + 8x = -432
i dont know how to find the x int. and the y int. or the slope in this problem
Click here to see answer by tutorcecilia(2152)

Question 52063: You have at least $30 in change in your drawer, consisting of dimes and quarters. Write an inequality that shows the different number of coins in your drawer.
The first thing I notice is that there doesn't seem to be enough information, but I sure that is not the case. I think that $30 would be represented as 30 is greater than or equal to 30.

Click here to see answer by tutorcecilia(2152)

Question 52073: The line is perpendicular to the line whose equation is 4x - y = 6 and has the same y-intercept as this line.
Click here to see answer by funmath(2925)

Question 52073: The line is perpendicular to the line whose equation is 4x - y = 6 and has the same y-intercept as this line.
Click here to see answer by tutorcecilia(2152)

Question 52152: HI, could I get some help with the following problem. The question is: Find the ordered pairs and graph the following equation. x + 2y = 4. Thank You
Click here to see answer by checkley71(8403)

Question 52127: 7-4c=10c
Click here to see answer by checkley71(8403)

Question 52186: GRAPH:a line with a slope of 2 and a y-intercept of 3.
Click here to see answer by blubunny01(20)

Question 52254: y=2/3x -3
i know this is in y=m (x) + b but i don't know where to start.
Click here to see answer by tutorcecilia(2152)

Question 52181: graph the function y=f(x)=x^2
Click here to see answer by rchill(405)

Question 52180: graph the function y=f(x)=x^2
Click here to see answer by rchill(405)

Question 52182: graph the function y=f(x)=x^2
Click here to see answer by rchill(405)

Question 52391: Could I get some help with the following problem: Graph the line that passes through the point (3,0) that has a slope of -2/3. Thanks
Click here to see answer by Nate(3500)

Question 52391: Could I get some help with the following problem: Graph the line that passes through the point (3,0) that has a slope of -2/3. Thanks
Click here to see answer by Earlsdon(6287)

Question 52389: Could I get some help with the following: Put the following in slope intercept form and graph> 16x+4y=-20 Please help thanks
Click here to see answer by Earlsdon(6287)

Question 52390: Could someone please explain this problem: graph the line that passes through the point (3, -2) that has a slope of 4/3. Thanks
Click here to see answer by THANApHD(104)

Question 52386: Please help. Im so stuck on this lesson. The question is: put the following in slope intercept form and graph> 2x-4y=8. Thanks
Click here to see answer by THANApHD(104)

Question 52407: If a=1 ... b=2 ... c=3 ... and so on ...
19 , 5 , 24
My teacher says that if we give him the answer on anything (he said we can even give him the answer engraved on a desk) then we pass the class with an A.
Click here to see answer by Nate(3500)

Question 52405: My friend is really fat. She weighs a buttload of 320lbs. She says she wants to be 92lbs at the end of 100 days. She thinks I am some math nerd. Can you help?
Click here to see answer by sodapop12(2)

Question 52403: I am not fat or anything, but I was wondering if you could help me with this problem.
Lets say I weigh about 320lbs (i don't though), and I want to weigh 92lbs over a period of 100 days. How much weight must I lose per day to drop 228lbs?
I asked my teacher, and he says it's one of these:
a.) 100lbs a day
b.) 50lbs a day
c.) 2.28lbs a day
d.) Never going to happen in your life.
Click here to see answer by sodapop12(2)

Question 52404: My mom says that dad likes his slope to be (50/1). I want to know what they are talking about...? My dad is a math guru, kinda. Also, he said on off days he has his slope (1/50). Now, he wants me to find the best slope for a medium day. Can you help?
Click here to see answer by rapaljer(4667)

Question 52331: solve and check please..
-6x+2-2(x+1)=6x+6
Click here to see answer by Niku(6)

Question 52334: solve and check please..
32-2(5-2^2)=45x
Click here to see answer by Niku(6)

Question 52411: v-4(4-v)=-2(2v-1)= v - 16 - 4v + -4v + 2 = -16 -3v = -4v + 2 =-16 -2 + 4v+ 3v =
-14/4 = 7v/7 = -2
Click here to see answer by csanders1514(1)

Question 52447: . If 1/3 is subtracted from 3 times the reciprocal of a certain number, the result is 25/6. Find the number.
Click here to see answer by AnlytcPhil(1277)

Question 52335: solve and check please...
x/2x+2=2x/4x+4+2x-3/x+1
Click here to see answer by darq(90)

Question 52482: find the slope of the line containing the points (-2,4)and (8,-3)
Click here to see answer by darq(90)

Question 52481: I need to explain how to find the y-intercept for the graph of 2x-5y=10
Click here to see answer by darq(90)

Question 52483: i need to graph the equation x=1/2
Click here to see answer by stanbon(57361)

Question 52489: (-4,0),(-4,3)
(1,-1),(1,3)
How do you find these slopes? I don't get how you find it.
Click here to see answer by checkley71(8403)

Question 52508: I need to graph:

2x - y = -16

I know how to graph, and can find the solution sets, however, I need to figure out the 'formula' (not sure if that's what it's called) but I mean, like, for the problem: x + 2y = 0 the 'formula' is y = -1/2x, and then you can plug any number in for x, and it works. When I try to get the 'formula' for 2x - y = -16 I can only figure out one that will work if x is a positive number, or only work if x is a negative number, but I can't figure out one that will work if x is either negative or positive. Could anyone help me figure out a 'formula' that will work no matter what number you plug in for x?

lol, I hope someone understands my question :o)

Thanks,
~ Jasmine

Click here to see answer by stanbon(57361)

Question 52516: Fraction format Y/6 = y + 5
I have worked the problem as below but I don't understand the rest. Please assist with the missing steps.
6(y/6) = 6(y + 5)
y - 6y = 6y + 30
+ 6y 6y
------------------
1y = 12y + 30
-1y -1y
------------------
0 = 11y + 30

Click here to see answer by Earlsdon(6287)

Question 52566: I need help with this problem, i dont know what |x+6|means i mean i know what the rest of the problum is but i dont know if it is like parenthases or somthing else well the whole problum is
|x+6|+8=4
the help would be most appreciated
thanks Pheobe
Click here to see answer by Nate(3500)

Question 52564: 1/6(x+6)=11
Click here to see answer by Nate(3500)

Question 52563: |x+6|+8=4
Click here to see answer by Nate(3500)

Question 52576: Hi,

I just read about graphing slopes, formulas and all that stuff and am pretty confused...

When I try to solve the below problem, I'm getting the right answer, except I'm getting a negative answer instead of positive...

The problem:

"Find the slope and y-intercept of the line whose equation is given and then graph the line.

3x + 5y + 10 = 0"

My effort:

3x + 5y + 10 = 0 or
3x + 5y = -10 or
5y = -3x + -10 or
y = -3/5x + -2

M = -3/5
Y-intercept = (0,-2)

I checked in the back of the book, and the correct answer is:

M = 3/5
y-intercept = (0,2)

But even after going over the problem, I can't figure out why I get a negative, and they get a positive...

Any help would be very much appreciated! (I don't need help with the graphing part though, I think I've got that :o)

Thanks,
~ Jasmine
Click here to see answer by Nate(3500)

Question 52592: use the midpoint formula repeatedly to find the three points that divide the segment joining (x1, y1) and (x2, y2) into four equal parts
Click here to see answer by checkley71(8403)

Question 52600: Find the equation of a line that: passes through the point (0,4) and is parallel to y= 2x - 2

can i please have an ezplanation how to sovle similar problems to this one. thank you!
Click here to see answer by stanbon(57361)

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