Thursday

April 24, 2014

April 24, 2014

Total # Posts: 1,699

**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

**Alegbra**

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 rig...

**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 = 6...

**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 h...

**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 po...

**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 = 100...

**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 nowher...

**algebra**

Answered below. Please don't repost without checking your original post first for an answer. Also, tutors volunteer their time. You must have patience. If your question is not answered after 4 hours or so, then repost your question.

**math**

75x^4 + 35x^3 - 10x^2 See your first post below for an example of how this is done. Hint, factor out 5x^2 first, then factor the remaining expression. You will never learn without practice :)

**algebra**

12y^3 + 48y^2 + 24y You try now. Hint, factor out 12y first.

**algebra**

12y^3 + 48^2 + 24y Are you sure this is the equation? If so, A = Lw Factor, 12y^3 + 48^2 + 24 12(y^3 + 2y + 192) L = 12 m^2 w = (y^3 + 2y + 192) m^2

**math**

81x^2 - 54xy + 9y^2 9(9x^2 - 6xy + y^2) 9(3x - y)(3x - y) 9(3x - y)^2

**algebra**

25y^2 - 4z^2 A = Lw Factor, 25y^2-4z^2 (5y - 2z)(5y + 2z) L = (5y - 2z) m^2 w = (5y + 2z) m^2

**math**

GCF = 3x^4 3x^4(5x - 3)

**Math**

Triangle Area = 1/2 bh 60 = 1/2 15b 120 = 15b b = 8 base = 8 height = 15 s = sides The height h of the isosceles triangle h = (sqrt(s^2 - 1/4 b^2)) 15 = (sqrt(s^2 - 1/4 8^2)) 15 = (sqrt(s^2 - 1/4 64)) 15 = (sqrt(s^2 - 16)) Square both sides 225 = s^2 - 16 s^2 = 241 s = 15.52 O...

**algebra**

(x + 2)/13 = 7/13 Multiply both sides by 13 x + 2 = 7 x = 5

**Algebra**

In 1995--64.8 yrs In 1999--67.2 yrs To write the equation, use the points 1999 - 1995 = 4 yrs 1995--(0, 64.8) 1999--(4, 67.2) Equation through two points, y - y1 = (y2 - y1)/(x2 - x1) * (x - x1) y - 64.8 = (67.2 - 64.8)/(4 - 0) * (x-0) y - 64.8 = 2.4/4 x y - 64.8 = 0.6x y = 0....

**calculus please help**

f(x) = -1/2(x^2) Step 1 f(x + h)= -1/2(x + h)^2 f(x + h)= -1/2(x^2 + 2xh + h^2) f(x + h)= -1/2 x^2 - xh - 1/2 h^2 Step 2 f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 - (-1/2 x^2) f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 + 1/2 x^2 f(x + h) - f(x) = -xh - 1/2 h^2 f(x + h) - f(x) = h (-x...

**Calculus **

The derivative of a constant is 0. f' = 0

**Calculus**

Example of 4 step process f(x) = -1/2(x^2) Step 1 f(x + h)= -1/2(x + h)^2 f(x + h)= -1/2(x^2 + 2xh + h^2) f(x + h)= -1/2 x^2 - xh - 1/2 h^2 Step 2 f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 - (-1/2 x^2) f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 + 1/2 x^2 f(x + h) - f(x) = -xh - 1/2 h...

**pre- algebra**

Sorry, John I was rushing to leave. I said to add but I then I had a typo. Thanks to MattsRiceBowl for catching this.

**pre- algebra**

6 * 6 * 6 * 6 * 6 * 6 * 6 * 6 = ? Or use a calculator

**pre- algebra**

6^4 * 6^2 = 6^8 (add exponents) I'll leave it to you to cal. 6^8

**math**

Largest rectangle is a square P = 2w + 2L 68 = 2w + 2L 34 = w + L 34/2 = 17 34 = 17 + 17 Dimension = 17 x 17

**Math**

-4/0 = undefined You CANNOT divide by 0.

**Math**

slope = undefined

**algebra**

w = width w + 10 = length Area = 144 A = Lw 144 = w(w + 10) Solve for w

**algebra**

Solve the following, 14 + x + 4 + 2x - 3 >= 57

**Math**

negative * positive = negative Same for division. (√2/2)/(-√2/2) = -1 If this isn't your complete problem, you must have a mistake someone.

**math**

27m^2 - 36 + 12 Can't be factored, but can be simplified. 27m^2 - 24

**math**

10s^2 + 4st - 6t^2 2(5s^2 + 2st - 3t^2) 2(5s - 3t)(s + t)

**math**

y^2 - y + 0 = y(y - 1)

**Math**

5y + 3 = 2y - 3x + 5 Subtract 2y from both sides 5y - 2y + 3 = 2y - 2y - 3x + 5 3y + 3 = -3x + 5 3y = -3x + 2 y = -x + 2/3 y = 2/3 - x

**geometry**

Similar figures have corresponding sides, areas and perimeters in the same proportion. 32 : 288 = 4 : x 32/288 = 4/x cross multiply 32x = 1152 x = ?

**math**

A = Lw 12y^3+48y^2+24y Factor into 2 factors. 1st factor = w 2nd factor = L

**Math**

Not solve, simplify (√(2)/2) / (-2/√(2)) (sqrt(2))/2 * (sqrt(2))/2 = -2/4 = -1/2 I don't know what this means in regards to the above. (simplify part) "the answer is 1 in other words it's tan(π/4)= 1"

**math--incomplete problem**

Your problem is incomplete.

**Algebra--incomplete problem**

What is your question?

**Math**

10y = 5x + 10 y = (5x + 10)/10 y = 5x/10 + 10/10 y = 1/2 x + 1

**math**

Should be 5 : 8 = 15 : x 5x = 120 x = ?

**math**

5 : 8 = 15 : 8 5/8 = 15/x Cross multiply 5x = 270 x = ?

**Math-True OR False Please Help!**

the y-intercept of f(x) is an x-intercept of f^-1 Look at the example I did for you. What is the y-intercept of f(x)? What is the x-intercept of f^-1? Are they the same? If yes, true. If not, false.

**Math-True OR False Please Help!**

This exact question was answered yesterday. Are you Sam too? Try an example to see if this is true. f(x) = 3x - 1 So, f(x) has y-intercept = -1 To find inverse of f(x), y = 3x - 1 x = 1/3 y + 1/3 y = 1/3 x + 1/3 f^-1 = 1/3 x + 1/3 To find x-intercept, y = 1/3 x + 1/3 0 = 1/3 x...

**math**

0.0725 * 20 = 1.45 20.00 + 1.45 = ?

**???---English **

If you would like an answer to your question in a timely manner please follow directions. Place your school subject name in the School Subject box.

**Math**

Please don't repost a question without checking your prior post for an answer. Your check was answered the first time you asked.

**Math**

20% = .20 Savings = 0.20 * 45.87 Savings = ?

**MATH**

1/2 ball = hemisphere d = 3 r = 1/2 d = 1.5 V = 2/3 pi r^3 V = 2/3 (3.14)(1.5)^3 V = 2/3 (3.14)(3.375) V = ?

**Calculus**

derivative of 4e^x+x^3 Dx(e^x) = e^x Dx(x^3) = 3x^2

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