Saturday

August 2, 2014

August 2, 2014

Total # Posts: 1,682

**trig**

In google type: functions graphs online When you see list of results click on: rechneronline.de/function-graphs/ When page be open in blue rectangle type: 1/2cos(x) And click option: Draw then type : 2cos(x)+1 OR 2cos (x+1) And click option: Draw etc. You must write correct ex...

**math for elementry school teacher**

x =original number Mathematical operations: Add 10 : x + 10 Multiply the result by 4 : ( x + 10 ) * 4 Add 200 : ( x + 10 ) * 4 + 200 Divide by 4 : [ ( x + 10 ) * 4 + 200 ] / 4 Subtract your original number : [ ( ( x + 10 ) * 4 + 200 ) / 4] - x Equation is: [ ( ( x + 10 ) * 4 +...

**Trig**

pi < x < 3 pi / 2 180 ° < x < 270 ° That is Quadran III In Quadran III cosine are negative. cos ( x ) = + OR - 1 /sqrt [ 1 + tan( x ) ^ 2 ] In this case : cos ( x ) = - 1 / sqrt [ 1 + tan( x ) ^ 2 ] cos ( x ) = - 1 / sqrt [ 1 + ( 9 / 4 ) ^ 2 ] cos ( x ) = -...

**Math**

A perfect square is any rational number that is the square of another rational number. 1 ^ 2 = 1 2 ^ 2 = 4 5 ^ 2 = 25 6 ^ 2 = 36 7 ^ 2 = 49 etc. Your series is a perfect square with negative odd numbers. The next 3 numbers are : - 25 , 36 , - 49

**Trig**

In Quadrant III sin ( theta ) , cos ( theta ) , sec ( theta ) and csc( theta ) are negative. tan ( theta ) = sin ( theta ) / cos ( theta ) are positive. tan ( theta ) = + OR -1 / sqrt [ csc ( theta ) ^ 2 - 1 ] tan ( theta ) = + OR -1 / sqrt [ ( -2 ) ^ 2 - 1 ] tan ( theta ) = +...

**math**

In google type: calculatorsoup calculators fractionsorder When you see list of results click on: Ordering Fraction Calculator-Calculator Soup When page be open in rectangle type you are fractions separated wit comma and click option: Calculate You will see answers with explana...

**I NEED HELP (ALGEBRA)**

( 8 x ) ^ 3 * 8 ^ ( -4 ) = 8 ^ 3 * x ^ 3 / 8 ^ 4 = 8 ^ 3 * x ^ 3 / ( 8 ^ 3 * 8 ) = [ ( 8 ^ 3 ) / ( 8 ^ 3 ) ] * ( x ^ 3 / 8 ) = x ^ 3 / 8 2 x ^ ( - 5 ) * y ^ ( - 3 ) = 2 / ( x ^ 5 * y ^ 3 ) [ (4 x ^ 4 y ^ ( - 3) ] ^ ( - 2 ) = [ ( 4 x ^ 4 / y ^ 3 ) ] ^ ( - 2 ) = 1 / ( 4 x ^ 4 / ...

**Trig**

tan ( x ) = sin ( x ) / cos ( x ) tan ( x ) + sin ( x ) = sin ( x ) / cos ( x ) + sin ( x ) = sin ( x ) * [ 1 / cos ( x ) + 1 ] = sin ( x ) * [ sec ( x ) + 1 ] = sin ( x ) * [ 1 + sec ( x )] [ 1 + sec ( x ) ] / [ tan ( x ) + sin ( x ) ] = [ 1 + sec ( x ) ] / [ sin ( x ) * [ 1 ...

**calculus**

Go on: wolframalpha dot com When page be open in rectangle type: limit sin(8 theta) / theta as theta->0 OR limit sin(8 theta) / theta as theta->infinity OR limit sin(8 theta) / theta as theta->-infinity and click option = After few seconds when you see result click op...

**college algebra**

log = natural logarithm log ( a ^ n ) = n * log ( a ) If your expression mean : e ^ ( 0.05 t ) = 1600 then : 0.05 t * log ( e ) = log ( 1600 ) Remark : The natural logarithm of e = 1 0.05 t = log ( 1600 ) Divide both sides by 0.05 t = log ( 1600 ) / 0.05 Remark : 1 / 0.05 = 20...

**Precalculus**

No it isn't. The correct answer is x = 0 6 ^ ( x + 3 ) = 6 ^ ( 0 + 3 ) = 6 ^ 3 = 216 6 ^ x = 6 ^ 0 = 1 216 - 1 = 215

**Integral Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: integrate (5y+4) dy/ã5y-1 and click option = After few seconds when you see result click option: Show steps

**math-calculus**

| x ^ 2 - 2 x - 6 |= 4 Eliminate the absolute value : x ^ 2 - 2 x - 6 = 4 OR x ^ 2 - 2 x - 6 = - 4 Your must solve both equations. In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula ...

**math**

100% = 100 / 100 = 1 10 % = 10 / 100 = 0.1 100% + 10 % = 1 + 0.1 = 1.1 A = Original Area A1 = New Area Original Area: A = W * L = 450 m ^ 2 New Area: A1 = 1.1 * W * 1.1 * L A1 = 1.1 * 1.1 * W * L ( Remark: W * L = A ) A1 = 1.21 * A A1 = 1.21 * 450 = 544.5 m ^ 2

**algebra**

1. All parts must be great of 0 less numbe is 11 solution x > 11 2. In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page be open in rectangle type: 2x^2-x=-7 and click opt...

**calculus**

Go on: wolframalpha dot com When page be open in rectangle type: integrate cos^3(2x-5)dx and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**calculus**

Go on: wolframalpha dot com When page be open in rectangle type: derivative (5 sec^2 x-7 ) ^3 (x^5-5 cosec x - 1)^7 and click option = After few seconds when you see result click option: Show steps

**Trig**

sec ( theta ) = 1 / cos ( theta ) sec ( theta ) - cos( theta ) = [ 1 / cos ( theta ) ] - cos ( theta ) = [ 1 - cos ^ 2 ( theta )] / cos ( theta ) = sin ^ 2 ( theta) / cos ( theta ) = sin ( theta ) * sin ( theta ) / cos ( theta ) = [ sin ( theta ) / cos ( theta ) ] * sin ( thet...

**geometry**

In google type: Use the figure below to answer questions 8-10. Point B is the midpoint of Segment A C.. You will find answer

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: second derivative 3/(x^2+12) and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**Trigonometry**

Remark: cos ^ 2 ( x ) = 1 - sin ^ 2 ( x ) 12 cos ^ 2 ( x )= 12 [ 1 - sin ^ 2 ( x ) ] = 12 - 12 sin ^ 2 ( x ) 29 sin ( x ) - 12 cos ^ 2 ( x ) + 4 = 29 sin ( x ) - [ 12 - 12 sin ^ 2 ( x ) ] + 4 = 29 sin ( x ) - 12 + 12 sin ^ 2 ( x ) + 4 = 29 sin ( x ) - 8 + 12 sin ^ 2 ( x ) = 12...

**Trigonometry**

If your expression mean: 4+29sin(x)=12cos^2(x) then go on: wolframalpha dot com When page be open in rectangle type: solve 4+29sin(x)=12cos^2(x) and click option = After few seconds when you see result click option: Show steps

**calc 1**

Go on: wolframalpha dot com When page be open in rectangle type: integrate e^(8x)sin(e^(8x)) and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**calculus**

Go on: wolframalpha dot com When page be open in rectangle type: integrate (sin(2x))^2cos(2x)dx and click option = After few seconds when you see result click option: Show steps Then in rectangle type: derivative (1/6)sin(2x)^3 click option = and Show steps On wolframalpha dot...

**Math**

In google type: functions graphs online When you see list of results click on: rechneronline.de/function-graphs/ When page be open in blue rectangle type: x^2+3x-10 Set: Range x-axis from -6 to 4 Range y-axis from -13 to 7 and click option: Draw The graph of a quadratic functi...

**calculus**

Go on: wolframalpha dot com When page be open in rectangle type: integrate (6x+7)/(x^2-8x+25) and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**Math**

In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page be open in rectangle type: 2x^2+8x=-5 and click option: solve it! You wil see solution step-by-step

**MATH**

Go on: wolframalpha dot com When page be open in rectangle type: integrate (x^2+1)^2 and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**Algebra**

Go on: wolframalpha dot com When page be open in rectangle type: -4^2+44x-160=0 and click option = After few seconds you will see graph,and solution .

**math**

In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page be open in rectangle type: x^2+18x+4=0 and click option: solve it! You wil see solution step-by-step.

**calculus**

Go on: wolframalpha dot com When page be open in rectangle type: x^3 - 12x^2 + 36x and click option = After few seconds you will see everything about that function.

**algerbra**

2 x + 7 < x + 6 2 x - x < 6 - 7 x < -1

**math**

On your computer you have calculator: start -> Programs -> Accessories -> Calculator When you open Calculator click: View then Sceintific

**math**

On your computer you have calculator: start -> Programs -> Accessories -> Calculator When you open Calculator click: View then Sceintific

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: integrate dx/sqrt(9-8x-x^2) and click option = After few seconds when you see result click option: Show steps

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: integrate sin(4x) cos^2(4x) dx and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**Math**

5 / 8 = 3 5 / 3 8 = 15 / 24 5 / 6 = 4 5 / 4 6 = 20 / 24 5 / 8 + 5 / 6 = 15 / 24 + 20 / 24 = 35 / 24 = ( 24 + 11 ) / 24 = 1 + 11 / 24 = 1 11 / 24 Correct. 13 1 / 2 = 13 6 / 6 + 3 / 6 = 78 / 6 + 3 / 6 = 81 / 6 7 2 / 3 = 7 6 / 6 + 4 / 6 = 42 / 6 + 4 / 6 = 46 / 6 13 1 / 2 + 7 2 / ...

**Alg. II**

1. 4 x - 8 = 4 ( x - 2 ) x ^ 2 - 2 x = x ( x - 2 ) (4 x - 8 ) / ( x ^ 2 - 2 x ) = 4 ( x - 2 ) / [ x ( x - 2 ) ] = 4 / x 2. ( 8 x - 4 ) = 4 ( 2 x - 1 ) 2 x ^ 2 + 9 x - 5 = 2 x ^ 2 + 9 x - 5 + x - x = ( 2 x ^ 2 - x ) + ( 10 x - 5 ) = x ( 2 x - 1 ) + 5 ( 2 x - 1 ) = ( 2 x - 1 ) (...

**Geometry**

A x-intercept is a point on the graph where y is zero. 4 x - 6 y = 12 for y = 0 4 x - 0 = 12 4 x = 12 Divide both sides with 4 x = 3 x-intercept = 3

**geometry**

W = Width L = Length A = Area W = L - 6 A = W * L 135 =( L - 6 ) * L 135 = L ^ 2 - 6 L The exact solution are : L = - 9 cm and L = 15 cm The length can't be negative so: L = 15 cm W = L - 6 W = 15 - 6 = 9 cm A = W * L = 15 * 9 = 135 cm ^ 2 P. S. If you don't know how t...

**MATH**

1. 5 / 8 = ( 3 * 5 ) / ( 3 * 8 ) = 15 / 24 5 / 6 = ( 4 * 5 ) / ( 4 * 6 ) = 20 / 24 5 / 8 + 5 / 6 = 15 / 24 + 20 / 24 = 35 / 24 = ( 24 + 11 ) / 24 = 1 11 / 24 2. 2 3 / 5 + 4 4 / 5 = 2 + 4 + 3 / 5 + 4 / 5 = 6 + 7 / 5 = 6 + ( 5 + 2 ) / 5 = 6 + 1 + 2 / 5 = 7 2 / 5 3. 1 / 2 = 3 / 6...

**algebra the slope- intercept form**

If the equation of the line is given in the form : y = m x + b then m is the slope. In this case slope = 1 A y-intercept is a point on the graph where x is zero. y = x - 7 for x = 0 y = 0 - 7 y = - 7 y-intercept = - 7 For graph : Go on: wolframalpha dot com When page be open i...

**polynomial function**

p( - 4 )= 4 * ( - 4 ) ^ 3 - 3 * ( - 4 ) - 4 = 4 * ( - 64 ) + 3 * 4 - 4 = -256 + 12 - 4 = - 248 p( 1 / 4 )= 4 * ( 1 / 4 ) ^ 3 - 3 * ( 1 / 4 ) - 4 = 4 * 1 / 64 - 3 / 4 - 4 = 4 / ( 4 * 16 ) - 3 / 4 - 4 = 1 / 16 - ( 3 * 4 ) / ( 4 * 4 ) - ( 4 * 16 / 16 ) = 1 / 16 - 12 / 16 - 64 / 1...

**Math**

Take the input , divide it by 2 and then add 4. ( 12 / 2 ) + 4 = 6 + 4 = 10 ( ? / 2 ) + 4 = 16 Mulitiply both sides with 2 ? + 8 = 32 ? = 32 - 8 = 24 ( 32 / 2 ) + 4 = 16 + 4 = 20 ( 62 / 2 ) + 4 = 31 + 4 = 35 ( 70 / 2 ) + 4 = 35 + 4 = 39 ( 86 / 2 ) + 4 = 43 + 4 = 47 So, the rul...

**algebra**

1.9 s + 6 = 3.1 - s 1.9 s + s = 3.1 - 6 2.9 s = - 2.9 Divide both sides with 2.9 s = - 1

**Math**

In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page be open in rectangle type: -9v^2+35v-30=1-v and click option: solve it! You wil see solution step-by-step.

**Math**

3 ( x + 4 ) ^ 2 = - 27 Divide both sides with 3 ( x + 4 ) ^ 2 = - 9 The left hand side is a perfect square,so you can apply the square root method : x + 4 = + OR - sqrt ( - 9 ) x = + OR - sqrt ( - 9 )- 4 ( Remark: sqrt ( - 9 ) = sqrt ( - 1 * 3 ^ 2 ) = + OR - 3i where i = Imagi...

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: derivative ln(x^2/2x-3) and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**algebra**

The equation of any straight line, called a linear equation, can be written as: y = m x + b where : m is the slope of the line and b is the y-intercept In this case: m = - 8 / 11 y-intercept = - 5

**algebra**

-7 ( 11 - 4w ) - 15 w = -27- ( 50 - 13 w ) = - 7 * 11 + 28 w - 15 w = - 27 - 50 + 13 w ( Remark : -7 * - 4 w = 28 w - ( -13 w ) = 13 w ) -77 + 28 w - 15 w = - 27 - 50 + 13 w 28 w - 15 w - 13 w = - 27 - 50 + 77 0 = - 77 + 77 0 = 0 All values of w are solutions.

**Algebra 2**

P = Perimeter L = Length W = Width P = 2 L + 2 W P = 2 ( L + W ) P = 122 m L = 5 W - 11 122 = 2 ( 5 W - 11 + W ) 122 = 2 ( 6 W - 11 ) 122 = 12 W - 22 122 + 22 = 12 W 12 W = 144 Diwidw both sides with 12 W = 144 / 12 W = 12 m L = 5 W - 11 L = 5 * 12 - 11 L = 60 - 11 L = 49 m P ...

**Math 111**

a x ^ 4 + b x ^ 3 + c x ^ 2 + d x + e = a ( x - x1 ) * ( x - x2 ) * ( x - x3 ) * ( x - x4 ) In your case: a = 1 So: x ^ 4 + b x ^ 3 + c x ^ 2 + d x + e = ( x - ( - 6 ) ) * ( x - ( - 3 ) ) * ( x - 2 ) * ( x - 6 ) = ( x + 6 ) * ( x + 3 ) * ( x - 2 ) * ( x - 6 ) = x ^ 4 + x ^ 3 -...

**maths**

y = x - 2 y ^ 2 + x ^ 2 =10 ( x - 2 ) ^ 2 + x ^ 2 = 10 x ^ 2 - 2 * 2 x + 2 ^ 2 + x ^ 2 = 10 2 x ^ 2 - 4 x + 4 = 10 2 x ^ 2 - 4 x + 4 - 10 = 0 2 x ^ 2 - 4 x - 6 = 0 If you don't know how to solve this equation in google type: quadratic equation online When you see list of r...

**Math C30**

Go on: wolframalpha dot com When page be open in rectangle type: solve 2cos^2x=1 and click option = After few seconds when you see result click option: Show steps

**math**

7 - 4w <= 19 -4w <= 19 - 7 -4w <= 12 Divide both sides with -4 ( Remark: When you multiply or divide an inequality by a negative number, you must reverse the inequality symbol. ) w >= -3

**alegbra 1**

The equation of a straight line is : y = mx + b m = Slope b = the Y Intercept y = - 1 / 3 x - 3 Slope = - 1 / 3 Y Intercept = - 3

**algebra**

L = Lenght W = Width P = Perimeter P = 64 m W = 4 + L / 3 P = 2 * ( W + L ) = 64 m 64 = 2 * ( 4 + L / 3 + L ) Divide both sides with 2 32 = 4 + L / 3 + L 32 - 4 = L / 3 + L 28 = 4 L / 3 Multiply both sides with 3 28 * 3 = 4 L 84 = 4 L Divide both sides with 4 84 / 4 = L L = 21...

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: derivative -3x((x+1)^1/2) and click option = After few seconds when you see result click option: Show steps On wolframalpha dot com you can practice any kind of calculus.

**Math**

6 + ( 4 x 3 ) x 2 = 30 6 + 12 x 2 = 30 6 + 24 = 30

**Pre Calculus**

1 - ln ( 3 x + 2 ) = 0 1 = ln ( 3 x + 2 ) Cancel logarithms by taking exp of both sides: e = 3 x + 2 3 x + 2 = e 3 x = e - 2 Divide both sides with 3 x = ( e - 2 ) / 3

**math**

a = first side b = second side A = Area b = a + 7 A = a * b A = a * ( a + 7 ) A = a ^ 2 + 7 a a ^ 2 + 7 a = 330 a ^ 2 + 7 a - 330 = 0 The exact solutions are: a = -22 and a = 15 The length can't be negative, so a = 15 m b = a + 7 b = 15 + 7 b = 22 m A = a * b A = 15 * 22 A...

**Algebra 2**

Go on: wolframalpha dot com When page be open in rectangle type: solve 2x^2 - 5bx + 4cx - 10bc = 0 and click option = After few seconds ,when you see results click option: Show steps

**algebra**

The answer of Ms,Sue is wrong. 9 / 10 Y = 36 Multiply both sides with 10 Y 9 = 36 * 10 Y 9 = 360 Y Divide both sides with 9 1 = 40 Y Divide both sides with 40 1 / 40 = Y Y = 1 / 40 Y = 0.025

**Math**

x + 4 y = 4 4 y = 4 - x Divide both sides with 4 y = 1 - x / 4 12 y = 12 - 3 12 y = 9 Divide both sides with 12 y = 9 / 12 y = ( 3 * 3 ) / ( 3 * 4 = y = 3 / 4 In google type : functions graphs online When you see list of results click on : rechneronline.de/function-graphs/ Whe...

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: derivative (6x^3+2x)/(x^2-3x+5) and click option = After few seconds you will see result. Then click option: Show steps

**calculus**

Go on: wolframalpha dot com When page be open in rectangle type: solve e^8x^2-5 = 14 and click option = After few seconds you will see result. Then click option: Show steps

**math**

TODAY

**College Algebra :( **

In google type: functions graphs online When you see list of results click on: rechneronline.de/function-graphs/ When page be open in first rectangle type: 3x In second rectangle type: -2x In third rectangle type: (2/3)*x and click option: Draw Again open: rechneronline.de/fun...

**Calculus**

An inflection point is a point on a curve at which the second derivative changes sign. You must find point where second derivative = 0 Go on: wolframalpha dot com When page be open in rectangle type: second derivative of -10.61t^(3)+208.808t^(2)-168.202t+9775.234 and click opt...

**algebra**

( 55 + 80 + 70 + x ) / 4 <= 65 Multiply both sides with 4 55 + 80 + 70 + x <= 65 * 4 55 + 80 + 70 + x <= 260 x <= 260 - 55 - 80 - 70 x <= 55

**algebra**

4 x + y = 5 y = 5 - 4 x 3 x – 7 y = 27 - 7 y = 27 - 3 x Divide both sides with -7 y = - 27 /7 + 3 x / 7 In google type: functions graphs online When you see list of results click on: rechneronline.de/function-graphs When page be open in blue rectangle type: 5 - 4 x In gra...

**Algebra**

First in google type: Cramer's rule 2 equations When you see list of results click on: occc dot edu/maustin/cramers_rule/cramer's%rule.html and read text Then in google type: Cramer's rule 2x2 solver When you see results click on: Solver Using Cramer's Rule to ...

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: limit x^4 as 2 After few seconds when you see result click option: Show steps

**math**

Correction: ( -9h + 12h ) + ( - 6 + 40 ) = 22

**math**

-9h - 6 + 12h + 40 = 22 ( -9h + 12h ) - ( 6 + 40 ) = 22 3h + 34 = 22 3h = 22 -34 3h = - 12 Divide both sides with 3 h = -4

**Maths**

In google type: monthly payment definition You will find many sites with definition

**geometry**

The "point-slope" form of the equation of a straight line is: y - y1 = m ( x - x1 ) (x1, y1) is a known point m is the slope of the line (x, y) is any other point on the line In this case: m = 5 / 3 , x1 = 57 , y1 = 12 y - 12 = ( 5 / 3 ) (x - 57 ) y = (5 x / 3 ) - ( ...

**algebra**

Go on wolframalpha dot com When page be open in rectangle type: solve 5/(2x+1)^2 - 3/(2x+1)=2 After few seconds when you see results click option: Show steps

**math 116**

Go on wolframalpha dot com When page be open in rectangle type: solve (Correct expression of your function) After few seconds when you see results click option: Show steps

**math 116**

8x 4=4x 7 What this mean? 8 x + 4 = 4x + 7 8 x + 4 = 4x - 7 8 x ^ 4 = 4x ^ 7 Or what?

**math 116**

8 x + 4 = 4x 7

**calculus**

Go on wolframalpha dot com When page be open in rectangle type: limit 3x/(sin2x) as x->0 and click option: = After few seconds when you see result click option: Show steps

**Math(Please check! Thank you!!)**

568 cm = 568 / 100 = 568 * 0.01 = 5.68 m

**Math(Please check! Thank you!!)**

1) 1 kg = 1000 g 3.68 kg = 3.68 * 1000 = 3680 g 2) 1 m = 100 cm 1 cm = 1 / 100 = 0.01 m 568 cm = 568 / 100 = 5.68 * 0.01 = 5.68 m You can check this. In google type: unit converter You will find many sites for units convertion.

**algebra**

babygirl Can you solve any mathematical question,or you think that somebody on this site will working all your homeworks?

**math**

This is the square numbers. 1 ^ 2 = 1 2 ^ 2 = 4 3 ^ 2 = 9 4 ^ 2 = 16 5 ^ 2 = 25 6 ^ 2 = 36 7 ^ 2 = 49 8 ^ 2 = 64 Now put hyphens between EVERY digit: 1-4-9-1-6-2-5-3-6-4-9-6-4

**math**

C = 2 r pi 6 pi = 2 r pi Diwide both sides with 2 pi 3 = r r = 3 yd A = r ^ 2 pi A = 3 ^2 pi A = 9 pi yd ^ 2 For more information in google type: wikipeda circle

**Pre-Calc-Please check my answer-I think I have it**

In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page be open in rectangle type: 2x^2 + 5x = 10 and click option: solve it! You wil see solution step-by-step.

**Algebra**

3x + y = -8 y = -8 -3x 2x - y = 11 y= 2x - 11

**Pre-Calc-Please check my answer-I think its correc**

In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page be open in rectangle type: 2x^2 + 5x = 10 and click option: solve it! You wil see solution step-by-step.

**Calculus :)**

Go on site: wolframalpha dot com When page be open in rectangle type: integrate 53dx/(x^2sqrt(x^2+4)) and click option = After few seconds when you see results click option: Show steps

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: limit ((sqrt(x+4))-2)/x as x 0 and click option = After few seconds when you see result click option: Show steps If you dont know find derivative of(-2 +sqrt(x+4)) in wolframalpha type: derivative (-2 +sqrt(x+4))...

**pre calculus**

In google type: functions graphs online When you see results click on: rechneronline.de/function-graphs/ When page be open in blue rectangle type: x^3+3x^2-5x-7 Then set: Range y-axis from -20 to 20 and click option: Draw

**college algebra**

10 1/2 = ( 20 / 2 ) +( 1 / 2 ) = 21 /2 42 = 84 / 2 42 / ( 10 1/2) = ( 84 / 2 ) / ( 21 / 2 ) = 84 / 21 = 4

**college algebra**

S = C + RC S = C * ( 1 + R ) Divide both sides with ( 1 + R ) S / ( 1 + R ) = C C = S / ( 1 + R )

**Calculus**

Go to: wolfram alpha dot com When page be open in rectangle type: integrate x^9*(sin(x^5)) and click option = When you see result click option: Show steps

**Math**

x^13 = j Divide both sides with x x^13 / x = j / x ( Remark: x^13 / x = x^12 ) x^12 = j / x x^12 = 4 / 9 j / x = 4 / 9 Multiply both sides with 9 9 j / x = 4 Multiply both sides with x 9 j = 4x Divide both sides with 4 9 j / 4 = x x = 9 j / 4 x = ( 9 / 4 ) j

**math**

In google type: inequalities and negative numbers You will find couple sites. mathforum is good. 1. -2 x - 10 < 2 -2 x < 2 + 10 -2 x < 12 Divide both sides with -2 x > 12 / - 2 x > - 6 2. -2x + 15 < 17 -2 x < 17 - 15 -2 x < 2 Divide both sides with -2 x...

**Precalculus**

In google type: Write the rectangular equation (x+7)^+y^=49 in polar form When you see list of results click on: winpossible dot com

**math ap**

( 5 + 7 ) - ( 9 + 2 ) = 12 - 11 = 1 cm Put the 7cm and 5 cm rods together = 12 cm Put the 9cm and 2cm rods together = 11 cm Difference between is 1cm thus, you can use that difference to measure 1 cm.

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