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May 27, 2016

Posts by Helper

Total # Posts: 1,778

ALGEBRA/PLEASE HELP
LCM = (1 - 2t)(1 + 2t)
January 26, 2011

Algebra 1
Put the line in slope-intercept form, y = mx + b m = slope, b = y-intercept
January 26, 2011

Math
r = 2s - 8 2s = r + 8 s = 1/2 r + 4
January 26, 2011

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 ...
January 26, 2011

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
January 26, 2011

algebra2
Yes, b is the missing variable. But 3a^2b^2x still does not = 6a^2b^2x 6a^2b^2x = 6a^2b^2x
January 26, 2011

math
Find the inverse of f and see if it is g.
January 26, 2011

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.
January 26, 2011

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.
January 26, 2011

math
See the 1st link below under Related Questions. This exact problem was answered.
January 26, 2011

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
January 26, 2011

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.
January 26, 2011

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...
January 26, 2011

Algebra 1
Do you need a line parallel to 9x + y = 6? Or? I'm happy you understand!! Good work.
January 26, 2011

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...
January 26, 2011

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.
January 26, 2011

algebra2
Correct, (x - 3)(x + 5)
January 26, 2011

algebra2
x(x-3) + 5(x-3) What factors do both expressions have in common? Answer, (x-3) Can you factor now?
January 26, 2011

algebra2
Correct!!
January 26, 2011

algebra2
15Rx - 3Rex What factors do the two expressions have in common? Answer, 3Rx. Can you factor now?
January 26, 2011

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.
January 26, 2011

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...
January 26, 2011

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-...
January 26, 2011

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
January 26, 2011

math
-12 + r = -11 Add 12 to both sides 12 + 12 + r = -11 + 12 r = ?
January 26, 2011

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
January 26, 2011

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 ...
January 26, 2011

math
Do you mean 5 x 100 = 500 12 x 10 = 120 500 + 120 = 620
January 26, 2011

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
January 26, 2011

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 = ?
January 26, 2011

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
January 26, 2011

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 = ...
January 26, 2011

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
January 26, 2011

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.
January 26, 2011

ctc
Do you have a question?
January 26, 2011

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
January 26, 2011

Math
See 1st link below under Related Questions. This exact question was answered.
January 26, 2011

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 ...
January 26, 2011

Physics
See the links below under related questions. At least three of the links have answers to this almost exact question.
January 25, 2011

math
You're welcome.
January 25, 2011

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...
January 25, 2011

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 ...
January 25, 2011

Physics
See the 1st link below under Related Questions. A similar problem was answered.
January 25, 2011

CP Geometry
(sqrt(-60/5)) Break it down ((sr(-1))(sr(4))(sr(3))(sr(5)))/(sr(5)) 2i (sqrt(3))
January 25, 2011

Physics
See the 1st two links below under Related Questions. This almost exact problem was answered.
January 25, 2011

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?
January 25, 2011

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.
January 25, 2011

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. :)
January 25, 2011

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.
January 25, 2011

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, ...
January 25, 2011

math
Not correct. Post your work so I can see what you are doing wrong, because you are not even close. :)
January 25, 2011

math
Yes, always. All fractions have to have the same denominator to add.
January 25, 2011

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
January 25, 2011

Math
Thank you. :)
January 25, 2011

Math
Please see your 1st post for an answer. And, please don't repost a question without first checking to see if your original post was answered. Please have patience. The tutors volunteer their time to help you. Sometimes it takes awhile for a post to be answered. You have ...
January 25, 2011

Trig
I apologize. The answer hadn't been posted when you posted this.
January 25, 2011

Trig
See your 1st post for the answer. And, please check your original post for an answer before reposting.
January 25, 2011

general
Thank you Kristin.
January 25, 2011

math
What is 300 + 20? Answer, 320 Is this what you need? If so, you couldn't attempt this?
January 25, 2011

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 +- (...
January 25, 2011

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 ...
January 25, 2011

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.
January 25, 2011

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
January 25, 2011

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
January 25, 2011

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.
January 25, 2011

Math
See 1st post.
January 25, 2011

Math
You're welcome.
January 25, 2011

Math
0.2|-8| = 1.6 0.2 * 8 = 1.6 |5|-|-7| = - 2 5 - 7 = - 2
January 25, 2011

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)?
January 25, 2011

math
Duplicate post. See your 1st post.
January 25, 2011

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
January 25, 2011

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.
January 25, 2011

Math(geometry)
Cross off 8 + 0 = 8. Can't have a side of 0.
January 25, 2011

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
January 25, 2011

math
1.2
January 25, 2011

math
x = the number 6x = x + 6 Solve for x
January 25, 2011

math
164/24 = 6 20/24 = 6 5/6
January 25, 2011

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
January 25, 2011

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.
January 25, 2011

public finance
Not enough info. "calculate the MTR for his labor earnings"? More than this is missing too. Mortgage interest expense, itemized deductions, etc.
January 25, 2011

Pre-Algebra
D = RT (distance = rate x time) R = rate 8R >= 420 R >= 52.5
January 25, 2011

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
January 25, 2011

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
January 25, 2011

Math
correct :)
January 25, 2011

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...
January 25, 2011

Algebra
Formula for perimeter P = 2w + 2L x = length (L) y = width (w) 2x + 2y <= 60
January 25, 2011

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 = ?
January 25, 2011

Math
Not equal. You are solving an inequality. x > 0.5
January 25, 2011

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 = ?
January 25, 2011

Math
7 + 3 = 10 coins 3/10 = fraction of nickles fraction of dimes = ?
January 25, 2011

calculus
[1/(x^2+1)] By Formula, ∫1/(1 + x^2)dx = tan^-1(x) + C
January 25, 2011

physics
See the 3rd link below under Related Questions. This almost exact problem was solved there.
January 25, 2011

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
January 25, 2011

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-...
January 25, 2011

math
x = total employees .80x = 720 Solve for x.
January 25, 2011

social studies
Thank you Ms. Sue! :)
January 25, 2011

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.
January 25, 2011

Algebra
Ratio = 4:3 = 4/3 4/3 = x/(2/3) Cross multiply 3x = 4 * 2/3 Can you solve for x now?
January 25, 2011

math
To find the range, put the numbers in order. Range = highest - lowest
January 25, 2011

geometry
Complementary angles = 90 degrees x = one angle 1/3 x = other angle x + 1/3 x = 90 Combine terms and solve for x. Then use the above formula to find the other angle.
January 25, 2011

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