# Posts by Helper

Total # Posts: 1,882

math
A(-4,3) and B(2,-1) If you have points A(x1,y1) and B(x2,y2) Slope m = (y2 - y1)/(x2 - x1)

Math
V = lwh Divide both sides by lh w = V/lh

math
Assuming simple interest, I = PRT Interest = Principal x Rate x Time 525 = 3500(.06)T 525 = 210T T = ? years

LCM = (1 - 2t)(1 + 2t)

Algebra 1
Put the line in slope-intercept form, y = mx + b m = slope, b = y-intercept

Math
r = 2s - 8 2s = r + 8 s = 1/2 r + 4

geometry
Without seeing the diagram, not enough info. You would have to give a description that would allow for the tutor to understand where exactly this cord is, among other things. Could you solve this problem if all you knew was the info you posted? Think about that when posting a ...

math
x = amount for 3 2/5 x = amount for 2 5(2/5 x) = amount for 1 x + 2/5 x + 5(2/5 x) = 102,000 Solve for x

algebra2
Yes, b is the missing variable. But 3a^2b^2x still does not = 6a^2b^2x 6a^2b^2x = 6a^2b^2x

math
Find the inverse of f and see if it is g.

Math
Then post your answer, and ask for the answer to be checked. Less work for the tutor's, to type "yes" or "no", then to type out how the problem is done.

Math
Can you do any of these type problems? Post your work where you are stuck and someone will help. Tutors will not do your homework.

math
See the 1st link below under Related Questions. This exact problem was answered.

algebra
a4b + a5b + 3 What factors do all expressions have in common? Answer, none This cannot be factored. All you could do is, a4b + a5b + 3 ab (4 + 5) + 3

algebra
and the cost is 55.00 labor is 4.00 ? How about some periods or commas. Sometimes, if tutors cannot make out your post, they move on to one that they can understand.

Algebra 1
(6,7);9x+y=6 Put in y = mx + b form 9x + y = 6 y = -9x + 6 So slope m = -9 Perpendicular lines have slopes that are negative reciprocals of each other. Meaning, m1 x m2 = -1 m1 = -9 -9 x m2 = -1 m2 = 1/9 So, the slope of the line will be 1/9 y = 1/9 x + b To find b, P(6,7) y...

Algebra 1
Do you need a line parallel to 9x + y = 6? Or? I'm happy you understand!! Good work.

Algebra 1
(-8,6); 2x = 3y + 4 3y = 2x - 4 y =(2/3)x - 4/3 So, slope m = 2/3 Use y = mx + b and P(-8,6) to find the equation parallel You know m = 2/3, so you have to find b. y = 2/3 x + b Put in x any y values and solve for b. 6 = 2/3 (-8) + b See how my equation is different than yours...

Algebra 1
Esther, see your post below at 3:11pm that I answered. I gave you detailed instructions on how to do this almost exact problem. You will never learn without attempting the problem yourself. Post all your work if your are stuck.

algebra2
Correct, (x - 3)(x + 5)

algebra2
x(x-3) + 5(x-3) What factors do both expressions have in common? Answer, (x-3) Can you factor now?

algebra2
Correct!!

algebra2
15Rx - 3Rex What factors do the two expressions have in common? Answer, 3Rx. Can you factor now?

geometry
Your question makes no sense. Please post the question exactly as it appears from your homework. If the side = 140 in., that is the length of that side. There is nothing to calculate for that side.

math
Your question is unclear. A can of lemonade concentrate has a capacity of 355 mL. Does this mean that the can of concentrate makes 355mL of lemonade ? Or, do you mean that 355mL combined with 4 cans of water, for the total amount of lemonade? If the second, without knowing the...

Math
y = -6x Slope m = -6 There is no y-intercept. Pick points to graph. y = -6x x = 0, y = 0 x = 1, y = -6 x = -1, y = 6 x = 2, y = -12 x = -2, y = 12 If you graph this, you will see a line through the origin. This line does not intersect the y-axis. Therefore, there is no y-...

math
17 2/3 + 23 1/4 Find the LCD for 2/3 and 1/4 LCD = 12 17 8/12 + 23 3/12 = ? Now, can you add them? Reduce the answer if necessary

math
-12 + r = -11 Add 12 to both sides 12 + 12 + r = -11 + 12 r = ?

Algebra
x = lbs of cheaper coffee 2.75x = value of cheaper 100 - x = lbs of better coffee 5(100 - x) = value of better 100 = lbs of mixture 3.90(100) = value of mixture 2.75x + 5(100 - x) = 3.90(100) Solve for x, lbs of cheaper 100 - x = lbs of better

Algebra
RT = D (Rate x Time = Distance) R = rate of southbound train 4 = time of southbound 4R = distance of southbound train R - 12 = rate of northbound train 4 = time of northbound 4(R - 12) = distance of northbound train Since the sum of distances = 528 4R + 4(R - 12) = 528 Solve ...

math
Do you mean 5 x 100 = 500 12 x 10 = 120 500 + 120 = 620

Algebra
d = number of dimes .10d = value of dimes 85 - d = number of quarters .25(85 - d) = value of quarters 0.10d + .25(85 - d) = 14.50 Solve for d, number of dimes 85 - d = number of quarters

math
100 cm = 1 meter 4.5 meter x 100 cm = 450 cm 450 cm / 4.5 cm = number of pieces of ribbon 450/4.5 = ?

math
x = attendance at Friday's game 2/3 x + 7000 = attendance at Thursday's game x + 2/3 x + 7000 = 77000 Solve for x - Fri 2/3 x + 7000 - Thur

Algebra 1
Parallel to 3x = 5y + 2 through P(-5,8) Parallel lines have equal slopes First, you need to put the given line in slope-intercept form, to find the slope. Slope-intercept form, y = mx + b m = slope b = y-intercept 3x = 5y + 2 To put in slope-intercept form, solve for y. 3x = ...

algebra
x = grams of copper 0.075x = value of copper 170 - x = grams of silver 0.925(170 - x) = value of silver (100 - 7.5 = 92.5) .16(170) = value of mixture 0.075x + 0.925(170 - x ) = 0.16(170) Solve for x, grams of copper (170 - x) = grams of silver

maths
If your equation is, x + 3x - 6.75 = 0 4x = 6.75 x = 1.6875 You should ALWAYS proofread your problem after posting to make sure it makes sense. I have no idea what the ? means.

ctc
Do you have a question?

math
From Diana's solution, 2.4 hrs = 2 hrs 24 min To convert .4 hrs to minutes, multiply by 60. .4 hrs * 60 min = 24 min

Math
See 1st link below under Related Questions. This exact question was answered.

Algebra II
Poorly worded question. Natural numbers are the counting numbers, 1,2,3,4,5..... Whole numbers are the natural numbers including zero. No fractional parts or decimals and no negative numbers. What is meant by opposite? Since counting numbers are positive, negative? but ...

Physics
See the links below under related questions. At least three of the links have answers to this almost exact question.

math
You're welcome.

math
The formula for perimeter is, P = 2w + 2 L 30 = 2w + 2L 30 = 2(w + l) 15 = w + l So, for a perimeter of 30, you want to sketch rectangles that the width and length total 15. Some possible rectangles, 14 + 1 = 15 13 + 2 = 15 12 + 3 = 15 11 + 4 = 15 10 + 5 = 15 9 + 6 = 15 8 + 7...

Physics
The first link below does have an answer. Whether it is a complete answer, I wouldn't know. You have to scroll down quite a bit for the answer. I am pasting that answer here. Maybe it will help you get started. Physics - drwls, Tuesday, March 23, 2010 at 9:48pm First you ...

Physics
See the 1st link below under Related Questions. A similar problem was answered.

CP Geometry
(sqrt(-60/5)) Break it down ((sr(-1))(sr(4))(sr(3))(sr(5)))/(sr(5)) 2i (sqrt(3))

Physics
See the 1st two links below under Related Questions. This almost exact problem was answered.

math
Lisa, I hope I didn't sound mean to you. That is not my intention. You will never learn unless you try. It takes practice. :) Is there something in particular you don't understand about dealing with fractions?

math
Tutors do not do your homework. It is obvious that you are struggling with this. The only way you will learn is practice. Try these problems YOURSELF. If you have a specific question we will be more than happy to help, but YOU must attempt these problems first.

math
And, ignore how I said that I do it. Do it your way, however you were taught. Your way IS correct. I just prefer to do it the way I was taught. I don't want to confuse you. :)

math
Ok, sorry, your answer 8 25/72, was the SUM, not the final answer, which is the average. 8 25/72 is correct for the sum. You have to divide the sum by 2, for the average. So however you were adding is correct.

math
What grade are you in? Unless there is a new way taught for adding fractions, you can't do it like that. You have to convert each mixed number to a fraction 3 2/9 = 29/9 5 1/8 = 41/8 Then you add 29/9 + 41/8 Find the LCD 232/72 + 369/72 = 601/72 601/72 divided by 2, ...

math
Not correct. Post your work so I can see what you are doing wrong, because you are not even close. :)

math
Yes, always. All fractions have to have the same denominator to add.

Math
How did you get 40 from that? Do you mean 200/(x - 1) = 200/(x + 10) cross multiply 200(x + 10) = 200(x - 1) 200x + 2000 = 200x - 200 NO solution to this

Math
Thank you. :)

Math

Trig

Trig

general
Thank you Kristin.

math
What is 300 + 20? Answer, 320 Is this what you need? If so, you couldn't attempt this?

Math
y = sqrt(x^2 + 2x) square both sides y^2 = x^2 + 2x x^2 + 2x = y^2 complete the square x^2 + 2x + 1 = y^2 + 1 (x + 1)^2 = y^2 + 1 take the square root of both sides + x + 1 = (sqrt(y^2 + 1)) - x - 1 = (sqrt(y^2 + 1)) x = -1 + - (sqrt(y^2 + 1)) interchange x and y y = -1 +- (...

Math
D = RT (Distance = Rate x Time) Normal Rate R = rate T = time RT = 200 Increased Rate/less time R + 10 T - 1 (R + 10)(T - 1) = 200 Solve these two equation simultaneously. (R + 10)(T - 1) = 200 RT = 200 Expand the first equation and substitute RT = 200, for RT in that ...

geometry
If you sketch this out, the ladder, up against the wall, forms right triangle. Using the Pythagorean theorem, you need to find c, the hypotenuse. c^2 = 6^2 + 18^2 Solve for c, the length of the ladder.

math
1 square inches = 0.00694444 square feet 12 sq inches = 0.08333 sq ft 1 square ft = 144 sq inches 12 inches squared = 144 sq inches you are both right

math
(h+t)^6 = (h + t)(h + t)(h + t)(h + t) (h + t)(h + t) You would have to expand and multiply it out or use the binomial theorem. Or maybe a calculator of some sorts

math
You have to try this yourself. It is the only way you will learn. I've already done at least one of these problems for you. First, find the LCD for each . Post your work if you get stuck.

Math
See 1st post.

Math
You're welcome.

Math
0.2|-8| = 1.6 0.2 * 8 = 1.6 |5|-|-7| = - 2 5 - 7 = - 2

math
3/2 / 4/5 + 1/2 * 1/2 You need parentheses. Do you mean (3/2 / 4/5 + 1/2) * 1/2 ? or 3/2 / 4/5 + (1/2 * 1/2)?

math
Duplicate post. See your 1st post.

math
8/24 + 9/24 + 1/24 = 18/24 = 3/4 (3/4)/3 = 3/4 * 1/3 = 3/12 = 1/4 Average = 1/4

math
1/3 + 3/8 + 1/24 Find the LCD. In this case, LCD = 24 8/24 + 9/24 + 1/24 = ? Take the sum and divide by 3 for the average.

Math(geometry)
Cross off 8 + 0 = 8. Can't have a side of 0.

Math(geometry)
Formula for perimeter, P = 2L + 2w 2L + 2w = 16 2(L + w)= 16 L + w = 8 You need numbers that add to 8. 8 + 0 = 8 7 + 1 = 8 6 + 2 = 8 See how many you can come up with. There might be any easier way, that I'm not thinking about. Good luck

math
1.2

math
x = the number 6x = x + 6 Solve for x

math
164/24 = 6 20/24 = 6 5/6

math - algebra
I hit 'post answer' too soon. See below. Dan, Fran, and Stan have 194 cards. Dan has 24 less than Fran, and Stan has 35 more than Fran. How many do each of them have? Let x = the number of cards that Fran has. x + x - 24 + x + 35 = 194 3x + 11 = 194 3x = 183 x = 61

math - algebra
Are you sure that this is the exact wording for this problem? Need to know info for either Dan or Stan. You posted this almost exact same problem yesterday. I pasted that post below.

public finance
Not enough info. "calculate the MTR for his labor earnings"? More than this is missing too. Mortgage interest expense, itemized deductions, etc.

Pre-Algebra
D = RT (distance = rate x time) R = rate 8R >= 420 R >= 52.5

Math Algebra
2m +3n=4 -m + 2n= 5 Multiply by 2 (-m + 2n = 5) -2m + 4n = 10 2m + 3n = 4 Add the two equation 0 + 7n = 14 7n = 14 n = 2 To find m, substitute n = 2 in 2m + 3n = 4 and solve for m I'll let you finish Check your answers when you find m

geometry
P = 2w + 2L w = width, L = length Since, this is a square, w = L P = 2w + 2w P = 4w 2011 = 4w w = 2011/4 = 502.75 A = Lw Since this is a square, w = L = 502.75 A = (502.75)(502.75) A = ? square inches

Math
correct :)

Math
Are the sides of triangle BCE, BC, BE and EC ? In rectangle ABCD, is side BC opposite to side AD? If so, AD = BC = 3 If so, since BCE is an equilateral triangle, (all three sides equal)therefore BE = BC = EC = 3. I don't have the advantage of seeing the diagram you are, so...

Algebra
Formula for perimeter P = 2w + 2L x = length (L) y = width (w) 2x + 2y <= 60

Math Geometry
A line that bisects an angle divides it into two congruent parts. A triangle = 180 degrees 2(27) + 2(34) + x = 180 x = ?

Math
Not equal. You are solving an inequality. x > 0.5

Math Geometry
A right triangle has an angle of 90 degrees. The sum of the angles in a triangle = 180 degrees. 90 + 16 + x = 180 x = ?

Math
7 + 3 = 10 coins 3/10 = fraction of nickles fraction of dimes = ?

calculus
[1/(x^2+1)] By Formula, âˆ«1/(1 + x^2)dx = tan^-1(x) + C

physics
See the 3rd link below under Related Questions. This almost exact problem was solved there.

math
3/2 / 7/10 /5/2 without parentheses, I will divide in order. (3/2)/(7/10) = 3/2 * 10/7 = 30/14 (30/14)/(5/2) = 30/14 * 2/5 = 60/70 = 6/7

math
6y = -8x - 18 Put the equation in slope-intercept form, by solving for y 6y = -8x - 18 Divide both sides bu 6 y = -8/6 x - 18/6 Reduce fractions y = -4/3 x - 9/3 Now, the equation is in slope-intercept form. y = mx + b, where m = slope and b = y-intercept Slope m = ? y-...

math
x = total employees .80x = 720 Solve for x.

social studies
Thank you Ms. Sue! :)

social studies
The tutors here don't have a copy of your text book. This is something YOU need to do. READ section 6 of chapter 6. I'm sure you can find 10 important facts. Try.