# Posts by Helper

Total # Posts: 1,841

**algebra**

Ann/Sam, none of your problems make sense. I have no idea what you are trying to do.

**algebra**

Ann/Sam, none of your problems make sense. I have no idea what you are trying to do.

**foundationd of personal finance**

Pack your lunch at home instead of eating out every day (assuming you work). Bring a thermos of coffee to work instead of stopping at Starbucks.

**Geometry**

V = pi r^2 h units^3 r = 5, h = 4 V = (3.14)(5^2)(4) units^3 V = ?

**Algebra HELP**

In the future, please number each problem. 1. 18/5 2. all values of x ( all real numbers) 3. all values of x ( all real numbers) 4. no solution

**Algebra**

8x^2 - 16xy + 8y^2 Factor out 8 8(x^2 - 2xy + y^2) Now, using the form of, square of a difference a^2 - 2ab + b^2 = (a - b )^2 8(x^2 - 2xy + y^2) = 8(x - y)^2

**Algebra again. Help**

Recheck your problem. As your problem is stated, Reiny is correct.

**Algebra: Help please**

Please see this link for a definition. http://www.mathsisfun.com/definitions/monomial.html

**geometry**

Your question is not clear. "if df equals 300m, find df. round to the nearest tenth." Find df? df = 300m

**calculus--No question**

What is your question?

**P I**

84 - 60 = 24 (24/60) * 100 = % of increase = ?

**Math**

If you expect an answer to your question please put your school subject in the School Subject box.

**MPG**

525 mi /17.5 gal = mi/gal = ?

**Math**

If you expect an answer to your question please put your school subject in the School Subject box.

**notation**

If you mean percent, 5/8 = 0.625 * 100 = 62.5%

**commission rate**

150/3000 = 0.05 * 100 = 5%

**math**

g = grams of 99% cocoa 0.99g = value of 99% cocoa 200 - g = grams of 70% cocoa 0.70(200 - g) = value of 70% cocoa 0.86(200) = value of mixture 0.99g + 0.70(200 - g) = 0.86(200) Solve for g, grams of 99% cocoa 200 - g = grams of 70% cocoa

**To helper -**

I'm sorry, I have been having problems with my email. Soon as my son-in-law arrives home he can check from his computer (somehow?). I've had nothing but problems since I upgraded to Outlook from Outlook Express.

**Algebra**

q = number of quarters 3q - 4 = number of dimes 0.25q = value of quarters 0.10(3q - 4) = value of dimes 0.25q + 0.10(3q - 4) = 7.85 Solve for q, number of quarters 3q - 4 = number of dimes

**Algebra**

45t^2 - 72t + 24 Only 3 can be factored from each term.

**math**

4 2/3 = 14/3 15 * 14/3 = 210/3 = 70 Alternate way 15 * 4 2/3 = 15 * 4 + 15 * 2/3 = 60 + 30/3 = 60 + 10 = 70

**math**

13 1/3 divide by 6 2/9 13 1/3 = 40/3 6 2/9 = 56/9 Dividing is the same as multiplying by the reciprocal (13 1/3)/(6 2/9) = 40/3 * 9/56 = 120/56 = 2 8/56 = 2 1/7 I'm not sure what your question was, but it appears that you arrived at the correct answer.

**pre algebra**

Dividing is the same as multiplying by the reciprocal. (1/2)/(2/3) = 1/2 * 3/2 = 3/4

**algebra**

x = miles walked x + 5.75 = miles jogged(3/4 = .75) x + x + 5.75 = 15 Solve for x, miles walked

**math**

5.1 x 10^-6 Since the exponent is negative, count 6 places to the left from where the decimal point is. 5.1 x 10^-6 = 0.0000051

**Math**

Two Angles are Supplementary if they add up to 180 degrees. 180 - 35.5 = ?

**math**

Since you didn't specify, based on simple interest, 9 1/2% annual rate = 0.095 0.095/360 days = 0.000264 daily rate I = PRT I = 750 * 0.000264 * 200 I = ?

**Calculus**

sec^3 x tan x dx | = integral symbol Rewrite as | sec^2 x sec x tan x dx u = sec x du = sec x tan x | u^2 du 1/3 u^3 + C Substitute back in, u = sec x 1/3 sec^3 x + C

**math--Arianna check your problem**

25 = 5^3x-1 You need to use parentheses. Is it, 5^(3x - 1) ? Or, 5^(3)x - 1 ? Or, ?

**Math- Algebra II**

correct, no solution

**algebra**

x = plan 1 y = plan 2 175x = plan 1 cost 200y = plan 2 cost The two equations are, (Divided by 1000 for easier calculation) x + y = 38 175x + 200y = 7200 Solve these equations simultaneously to find x and y. (if you are correct, x = 16, y = 22)

**math**

5/t^1/4 - 6/t^2/3 I rewrite as, (my preference) 5t^(-1/4) - 6t(-2/3) h' = -1/4 * 5t^(-5/4) - (-2/3 * 6t^(-5/3)) h' = -5/4t^(-5/4) + 12/3t(-5/3) h' -5/4t^(-5/4) + 4t(-5/3) h' = 4/(t^(5/3)) - 5/(t(^5/4))

**accounting**

You also need to do an entry for the difference of 6500.

**Survey of Math 140**

Simple interest 10% = 0.1 /365 = 0.000274 daily interest 3/8 to 5/26 = 79 days 79 * 0.000274 = 0.021646 (79 day interest rate) * $4000 = $86.58 interest this period 5/27 to 7/31 = 65 days 65 * 0.000274 = 0.01781 (65 day interest rate) * $2700 ($4000 - 1300) = 48.08 interest ...

**Math**

(x+1)(4x^2-8x+7) u = x + 1 v = 4x^2 - 8x + 7 Use the product rule, d/dx (uv) = u dv/dx + v du/dx d/dx (uv) = (x+1)(8x-8)+(4x^2-8x+7)(1) You can take it from here

**physics for scientists and engeneers I**

assuming the 27 was really horizontal, then the change in velocity has to be determined. To get 43m high (that is pretty high)... 1/2 m vi^2=mg(43) vi=sqrt (86*9.8) change momentum=massball*deltaV ok,to get deltaV, deltaV=sqrt(86*9.8) j +27i) then force= changemometum/time you...

**Physics**

Doesn't one get a rainbow when a diamond bends light,each color in a slightly different directon?

**Physics**

what do currents do?

**intermediate algebra-check my answer**

You were given the points, (x1, y1) = (-8, -6) and (x2, y2) = (0, 0) y = 3/4 x + b Use one of the given points, for example, (-8, -6) Solve for b -6 = 3/4(-8) + b b = 0 Therefore, the equation is y = 3/4 x + 0 y = 3/4 x I guess I miss-understood you. I didn't realize that ...

**intermediate algebra-check my answer**

y = ax + b m = 3/4 y = 3/4 x + b You need to find b for this equation. Substitute one of the given points into your equation and solve for b. Then use that b value for your equation.

**Calculus (I Truly Need Help) Continued**

From algebra, do you know how to find the inverse? The same method is used. Have you tried to find the inverse?

**math**

(10,-4), (-3,10) Slope m = (y2 - y1)/(x2 - x1) m = (10 + 4)/(-3 - 10) m = 14/-13 = -14/13 = -1.07692

**Math**

Area of circle = pi r^2

**math**

Slope intercept form, y = mx + b (6,4), (-6,-6) m = (-6 - 4)/(-6 - 6) m = -10/-12 = 5/6 To find b, use (6,4) m = 5/6 4 = 5/6 (6) + b 4 = 30/6 + b 4 = 5 + b b = -1 Equation y = 5/6 x - 1

**Geometry**

I'll find one side. Triangle ABC, angle A = 36 side c (hypotenuse) = 9 To find side a (opposite side) sin A = op/hyp = a/c = a/9 sin 36 = a/9 0.5878 = a/9 9 * 0.5878 = a a = 5.2902 Area = 1/2 bh In this case, (right triangle) A = 1/2 ab (side a, side b) I found side a, you...

**Geometry**

Triangle ABC, angle A = 55 deg side b = 43 tan A = op/adj = a/b = a/43 tan 55 = a/43 a = 43 * 1.4281 a = 61.4083 cos 55 = adj/hyp = b/c = 43/c cos 55 = 43/c c = 43/0.5736 c = 74.9651 I'll let you finish (not sure what 'length of triangle' is) Length of triangle = ?

**exponents**

Please give an example.

**geometry**

Area = Lw Diagonal d^2 = L^2 + w^2 26^2 = L^2 + 10^2 676 = 100 + L^2 L^2 = 576 L = 24 L = 24, w = 10 A = Lw A = 24(10) A = ?

**matemáticas**

Is this the question? The rectangular base perimeter of a piano is 16 feet. What are all the possible dimensions of the piano, using only whole numbers of feet?

**math**

This is a dumb question (my opinion only). If he has an empty stomach, wouldn't the minimum volume be the volume of the pizza? This is a complete guess. Sphere volume = 4/3 pi r^3

**Algebra**

What are you trying to do with these equations? Please post the exact directions to your problem.

**College algebra**

See your post below for a detailed example of how to complete this problem.

**College algebra**

Slope-intercept form of the equation y = mx + b m = slope = 6/7 y = 6/7 x + b To find b, use point (0,3), where x = 0 and y = 3. Solve for b. y = 6/7 x + b 3 = 6/7(0) + b 3 = 0 + b b = 3 So, the equation is y = 6/7 x + 3

**Math**

x = people in audience 1/2 x = left 1st 1/3 (1/2 x) = 1/6 x = left next 1/4 (1/3)(1/2)x = 1/24 x = left last x - (1/2 x + 1/6 x + 1/24 x) = 9 Solve for x

**English**

I guess you don't want your question answered. You waste tutor's time when you don't follow directions and put your school subject in the School Subject box.

**math**

6xy is the correct answer.

**algebra**

3x + 4 > 9, Solve the inequality 3x + 4 > 9 3x > 5 x > 5/3 = 1.67 Therefore, for x to be a solution, x > 1.67 You should be able to finish the problem from here.

**math**

3^5 + 3^5 + 3^5 243 + 243 + 243 = ?

**algebra**

V = 1/3*6300*7 Multiply both sides by the denominator 3 3v = (6300)(7) 3v = 44,100 v = 14,700

**geometry**

Draw a rhombus with the diagonals. 4 right triangles are formed. The intersection of the diagonals of a rhombus form 90 degree (right) angles (property of a rhombus). The diagonals of a rhombus bisect each other. This means that they cut each other in half. So, each of the ...

**maths**

(0.008)^x = 1/25 x log 0.008 = log 1/25 -4.828314 x = -3.218876 x = -3.218876/-4.828314 x = ?

**Math**

x^3 = 27 Take cube root of both sides x = 3 Because, 3 * 3 * 3 = 27 I'm not sure what your 2nd problem is. Is your problem, x^4 = 16 ? If so, x^4 = 16 Take the forth root of both sides x = +- 2 Because, 2 * 2 * 2 * 2 = 16 Or, -2 * -2 * -2 * -2 = 16 FYI, 4^3 = 4 * 4 * 4 = ...

**Math Trivia**

The web link provided gave the answer. I pasted it below. The calculation was done wrong. The 2 dollars should not be added to 27 but subtracted to get 25 dollars. Put in another way, $25 is with the owner of the Hotel, each of the 3 guests received $1 from the clerk, and he ...

**math**

Answered in previous post.

**math**

If I am picturing this correctly, a right triangle is formed, with the diagonal of 75' being the hypotenuse. x = one leg (vertical height) x + 15 = other leg (horizontal distance) Use the Pythagorean theorem, c^2 = a^2 + b^2 75^2 = x^2 + (x + 15)^2 Solve for x

**TRIG**

2 sin Î¸ + 3 = 2 2 sin Î¸ = -1 sin Î¸ = -1/2 Î¸ = ?

**algebre**

x = shortest side 2x = 2nd side x + 30 = 3rd side x + 2x + x + 30 = 102 Solve for x, and use to determine the dimensions as defined above

**math**

(7x + 4)(2x + 4) Use FOIL-First, Outer, Inner, Last First-7x * 2x = 14x^2 Outer-7x * 4 = 28x Inner-4 * 2x = 8x Last-4 * 4 = 16 Put together, 14x^2 + 28x + 8x + 16 Combine like terms, 14x^2 + 28x + 8x + 16 14x^2 + 36x + 16 All the problems you have posted are done the same way...

**math**

See your post with the detailed answer of how these type problems are done. All the problems you posted are done the same exact way. Time to get to work.

**math**

See your post with the detailed answer of how these type problems are done. All the problems you posted are done the same exact way. Time to get to work.

**math**

See your post with the detailed answer of how these type problems are done. All the problems you posted are done the same exact way. Time to get to work.

**math**

See your post with the detailed answer of how these type problems are done. All the problems you posted are done the same exact way. Time to get to work.

**math**

You don't state if the interest is simple or compounded. For simple interest, I = PRT (Interest = Principal*Rate*Time) I = 300 * 0.03 * 30 I = ?

**college Trig**

Triangle ACB, C = 70 deg, a = 70, b = 50 find side c Use Law of Cosines--Case III (Given two sides and the included angle) c^2 = a^2 + b^2 - 2ab cos C c^2 = 70^2 + 50^2 - 2(70)(50) cos 70 Solve for c

**algebra**

28x^2 - 196xy + 343y^2 7(x^2 - 28xy + 49y^2) 7(2x - 7y)(2x - 7y) 7(2x - 7y)^2

**finance**

I'm not sure either Ms. Sue after seeing your answer. I multiplied out 10yrs at your rate and your answer is closer. I have to think about this more.

**finance**

1.55 - .79 = .76 increase in 10 yrs 0.76/0.79 = 0.962025 = 96.2025% increase in 10 years 96.2025%/10 = annual growth rate

**math**

x = larger number y = smaller number xy = 50 x/y = 2 or x = 2y Substitute, x = 2y in xy = 50 2y * y = 50 2y^2 = 50 y^2 = 25 y = +- 5 To find x, Substitute y = +- 5 in either equation xy = 50 5x = 50 x = 10 -5x = 50 x = -10 Numbers are 10, 5 or -10, -5

**math**

1/4 + 3/10 First, find the common denominator, 20. 5/20 + 6/20 = ?

**statistics**

y = 100 + 1.2x 130 = 100 + 1.2x Solve for x 30 = 1.2x x = 30/1.2 = ?

**math**

Please check your 1st post for an answer before reposting. This question was answered earlier today.

**For bobpursley**

I will email as soon as I can. My email is not working at this moment and I don't know why. My son-in-law is looking into it right now.

**algebra**

See your 1st post below.

**algabra**

For multiplication, the rule is a(bc) = (ab)c In numbers, this means 2(3×4) = (2×3)4 Can you do your problem now?

**math**

(8,-4) and (-7,9). Midpoint =(x1 + x2)/2, (y1 + y2)/2 Mx = (8 + -7)/2 = 1/2 = 0.5 My = (-4 + 9)/2 = 5/2 = 2.5 Midpoint (0.5, 2.5)

**algebra**

(6/-2)/-1/4 = -3 * -4/1 = 12 Division is the same as multiplying by the reciprocal.

**algebra**

5p + 15 What factors do both expressions have in common, 5. 5p + 15 = 5(p + 3)

**algebra**

2/9 * 2y/2y = 4y/18y

**Algerbra**

You're welcome :)

**Algerbra**

f(x) = -4x - 3 The slope-intercept form of an equation, where m = slope and b = y-intercept. y = mx + b Since your equation is already in the slope-intercept form, y = mx + b y = -4x - 3 Slope m = -4 y-intercept b = -3

**Algebra**

Look below "Post Answer" button. See "Related Questions", click the first link "Algebra". This almost exact question is answered there.

**Algebra**

Check your equation. I think it should be y = -1777x + 27,153 You have +1777x

**Algebra 1**

y = 3x - 1 y = -x + 1 Find points for each equation, then plot the points for each, draw a line connecting these points for each equation. The point of intersection is the solution. y = 3x - 1 x = 0, y = -1 x = -1, y = -4 x = 1, y = 2 x = 1/2, y = 1/2 So, you would plot the ...

**geometry**

tan 8 degrees = 0.1405 0.1405 * 100 = 14.05% grade

**Algebra**

You're welcome :)

**Algebra**

D = RT (Distance = Rate * Time) 120 = rate of Train B T = time of Train B 120T = distance of Train B 100 = rate of Train A T + 0.25 = time of Train A (5:25 - 5:10 = 15 min = 60/15 = 0.25 h) 100(T + 0.25) = distance of Train A Distances are equal 120T = 100(T + 0.25) 120T = ...

**algebra**

Slope = rise/run = 8/29 = ?

**Biology**

I would think the volume of a cylinder formula, as long as the cup diameter is uniform from top to bottom (not an older type cup where it is wider at the top than at the bottom of the cup).

**algebra**

w = width 2w + 1 = length P = 2w + 2L 302 = 2w + 2(2w + 1) Solve for w, the width. length = 2w + 1

**calculus**

To find the slope of the tangent line at a point means to find the derivative of f(x). f(x) = 3 - 5x f' = 0 - 5 f' = -5 Then, normally, you would plug in the given point, (-1, 8), to find the slope. But since f' = 5 with no variable x, for instance, there is ...