# 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

**ALGEBRA/PLEASE HELP**

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**

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 ...

**Trig**

I apologize. The answer hadn't been posted when you posted this.

**Trig**

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

**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.