Friday

September 19, 2014

September 19, 2014

Total # Posts: 1,715

**Math-Algebra**

x = Denominator nominator = x - 3 ( x - 3 + 5 ) / ( x + 5 ) = 3 / 4 ( x + 2 ) / ( x + 5 ) = 3 / 4 4 ( x + 2 ) = 3 ( x + 5 ) 4 x + 8 = 3 x + 15 4 x - 3 x = 15 - 8 x = 7 Denominator = 7 The numerator is 3 less than the denominator. Numerator = 7 - 3 = 4 original fraction = 4 /7 ...
*January 9, 2014*

**Math question**

For graph: go on : w o l f r a m a l p h a . c o m When page be open in rectangle type : plot - 27 > 3 t , t = -19 to 1 and click option = You will see graph
*January 7, 2014*

**maths**

4 / 27 * 3 / 16 = 4 / ( 9 * 3 ) * 3 / ( 4 * 4 ) = 1 / 9 * 1 / 4 = 1 / 36
*January 7, 2014*

**math**

Paste this question in google. You will find solution.
*January 3, 2014*

**math**

1. 2 ( x - 3 ) = 2 x 2 * x - 2 * 3 = 2 x 2 x - 6 = 2 x subtract 2 x to both sides 2 x - 6 - 2 x = 2 x - 2 x - 6 = 0 False. No solutions 2. 3 ( y - 3 ) = 2 y - 9 + y 3 * y - 3 * 3 = 2 y - 9 + y 3 y - 9 = 3 y - 9 True for all values of y. infinitely many solutions 3. 10 x - 2 - ...
*January 2, 2014*

**pre algebra**

28 / 95 = h / 17 28 * 17 = h * 95 476 = 95 h 476 / 95 = h 5.01 = h h = 5 ft approx.
*December 16, 2013*

**math**

Yes 6 / 15 = 3 * 2 / ( 3 * 5 ) = 2 / 5
*December 16, 2013*

**College Algebra**

Correct. 20 cents =0.2 $ 50 cents =0.5 $ 0.2 x + 0.5 y = 2 Subtract 0.2 to both sides 0.2 x + 0.5 y - 0.2 x = 2 - 0.2 x 0. 5 y = 2 - 0.2 x multiply both sides by 2 y = 4 - 0.4 x y = - 0.4 x + 4
*December 11, 2013*

**math 6th grade**

15 % = 15 / 100 = 0.15 75 / 0.15 = 500 lbs
*December 11, 2013*

**calculus**

d ( 1 / x ^ n ) / dx = - n * x ^ ( - n - 1 ) d ( 1 / x ) / dx = d ( 1 / x ^ 1 ) / dx = - 1 * x ^ ( - 1 - 1 ) = - 1 * x ^ - 2 = - 1 / x ^ 2 d ( 3x ) / dx = 3 d [ 3 x + 2 ( 37,500,000 / x ) ] / dx = 3 + 2 * 37,500,000 * ( - 1 ) / x ^ 2 = 3 - 75,000,000 / x ^ 2
*December 9, 2013*

**Math Help!**

1.) Plot a Cartesian coordinate system 1 equation : For x = 0 - y = 8 Multiply both sides by - 1 y = - 8 For y = 0 2 x = 8 Divide both sides by 2 x = 4 Mark points ( 0 , - 8 ) x = 0 , y = -8 and ( 4 , 0 ) x = 4 , y = 0 and draw line 2 equation: For x = 0 3 y = 11 Divide both ...
*December 7, 2013*

**Math**

OR V = ( d ^ 2 * pi / 4 ) * h V1 = ( 3 ^ 2 * pi / 4 ) * 4 = ( 9 * pi / 4 ) * 4 = 9 pi in ^ 3 V2 = ( 6 ^ 2 * pi / 4 ) * 6 = ( 36 * pi / 4 ) * 6 = 216 pi / 4 = 54 pi in ^ 3 V2 / V1 = 54 pi / 9 pi = 54 / 9 = 6 6 * 0.6 $ = 3.6 $
*December 7, 2013*

**Math**

V = ( d ^ 2 * pi / 4 ) * h V1 = ( 3 ^ 2 * pi / 4 ) * 4 = ( 9 * pi / 4 ) * 4 = 36 * pi / 4 V2 = ( 6 ^ 2 * pi / 4 ) * 6 = ( 36 * pi / 4 ) * 6 = 216 pi / 4 V2 / V1 = ( 216 * pi / 4 ) / ( 36 * pi / 4 ) = 216 / 36 = 6 6 * 0.6 $ = 3.6 $
*December 7, 2013*

**AP Algebra**

ln ( a ^ n ) = n * ln ( a ) ln ( a ) + ln ( b ) = ln ( a * b ) ln ( a ) - ln ( b ) = ln ( a / b ) 2 ln ( x ) + 3 ln ( y ) - ln ( 2 ) - 4 ln ( z ) = 2 ln ( x ) + 3 ln ( y ) - [ ln ( 2 ) + 4 ln ( z ) ] = ln ( x ^ 2 * y ^ 3) - ln ( 2 z ^ 4 ) = ln ( x ^ 2 * y ^ 3 / 2 z ^ 4 )
*December 3, 2013*

**Math**

In google type : convert decimal to fraction You will find many, many sites about that.
*November 28, 2013*

**algebra 1**

Common difference: 17 - 8 = 9 26 - 17 = 9 35 - 26 = 9 44 - 35 = 9 an = 8 + 9 * ( n - 1 ) = 8 + 9 n - 9 = 9 n - 1 n = 1 a1 = 9 * 1 - 1 = 9 - 1 = 8 n = 2 a2 = 9 * 2 - 1 = 18 - 1 = 17 n = 3 a3 = 9 * 3 - 1 = 27 - 1 = 26 n = 4 a4 = 9 * 4 - 1 = 36 - 1 = 35 n = 5 a5 = 9 * 5 - 1 = 45...
*November 27, 2013*

**cal**

The basic formula is ¦¤y ¡Ö y' ¦¤x y ' = 1 / ( 2 ¡Ì x ) 122 = 121 + 1 ¡Ì 121 = 11 So let x = 121 , y = 11 and ¦¤x = 1 y ' = 1 / ( 2 ¡Ì x ) = 1 / ( 2 * 11 ) = 1 / 22 = 0.0455...
*November 20, 2013*

**Algebra 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 : 5 x ^ 2 + 9 x - 2 = 0 and click option : solve it! You will see solution step by step
*November 13, 2013*

**Math**

You're welcome
*November 13, 2013*

**Math**

If your exspressio mean : ( 40 - x ) / 3 = 4 Then multiply both sides by 3 3 * ( 40 - x ) / 3 = 3 * 4 40 - x = 12 Subtract 12 to both sides 40 - x - 12 = 12 - 12 28 - x = 0 Add x to both sides 28 - x + x = 0 + x 28 = x x = 28
*November 13, 2013*

**Math**

40 - x / 3 = 4 Add x / 3 to both sides 40 - x / 3 + x / 3 = 4 + x / 3 40 = 4 + x / 3 Subtract 4 to both sides 40 - 4 = 4 + x / 3 - 4 36 = x / 3 Multiply both sides by 3 108 = x x = 108
*November 13, 2013*

**math**

n = number of passengers n = 50 m = number of mens m = ( 3 / 10 ) * 50 = 150 / 10 = 15 r = the rest r = 50 - 15 = 35 w = number of womans w = ( 2 / 7 ) * r = 2 * 35 / 7 = 70 / 7 = 10 c = number of childrens m + w + c = 50 15 + 10 + c = 50 25 + c = 50 Subtract 25 to both sides ...
*November 12, 2013*

**math**

1 / 3 = 3 / 9 5 2/9 - 3 1/3 = 5 2/9 - 3 3/9 = 5 - 3 + 2/9 - 3/9 = 2 - 1/9 = 1 + 1 - 1/9 = 1 + 9/9 - 1/9 = 1 + 8/9 = 1 8/9
*November 11, 2013*

**Algebra**

5 x - 7 y = - 16 Multiply both sides by - 2 - 10 x + 14 y = 32 2 x + 8 y = 26 Multiply both sides by 5 10 x + 40 y = 130 - 10 x + 14 y = 32 10 x + 40 y = 130 Add equations - 10 x + 10 x + 14 y + 40 y = 32 + 130 54 y = 162 Divide both sides by 54 y = 162 / 54 = 3 5 x - 7 y = - ...
*November 9, 2013*

**algebra 2 help please would appreciate**

( 4 / x + 5 / y ) / ( 3 / x + 7 / y ) = [ ( 4 * y + 5 * x ) / ( x y ) ] / [ ( 3 * y + 7 * x ) / ( x y ) ] = [ ( 5 x + 4 y ) / ( x y ) ] / [ ( 7 x + 3 y ) / ( x y ) ] = [ ( 5 x + 4 y ) * x y ] / [ ( 7 x + 3 y ) * ( x y ) ] = ( 5 x + 4 y ) / ( 7 x + 3 y )
*November 9, 2013*

**algebra 2 help please would appreciate**

2 x / x = 2 x / x = 1 [ 3 + ( 2 x / x + 4 ) ] / ( x / x + 4 )= ( 3 + 2 + 4 ) / ( 1 + 4 ) = 9 / 5
*November 9, 2013*

**Algebra 2 help please would appreciate**

( 8 x / 6 y ) / ( 2 x / 3 y ) = 8 x * 3 y / ( 6 y * 2 x ) = 24 xy / 12 xy = 2
*November 9, 2013*

**math**

84 = 65 + c Subtract 65 to both sides 84 - 65 = 65 + c - 65 19 = c c = 19 in
*November 4, 2013*

**math**

a = the length of the shortest side b = the length of the middle side c = the length of the longest side P = the perimeter The perimeter of a triangle is 42 inches. P = a + b + c a + b + c = 42 Subtract c to both sides a + b + c - c = 42 - c a + b = 42 - c The sum of the ...
*November 4, 2013*

**Algebra**

( 3 x ^ 2 - 7 x ) / 2 = 3 Multiply both sides by 2 3 x ^ 2 - 7 x = 6 Subtract 6 to both sides 3 x ^ 2 - 7 x - 6 = 6 - 6 3 x ^ 2 - 7 x - 6 = 0 in google type : quadratic equation online When you see list of results click on : Free Online Quadratic Equation Solver: Solve by ...
*October 30, 2013*

**maths**

in google type : quadratic equation online When you see list of results click on : Free Online Quadratic Equation Solver: Solve by Quadratic Formula Vhen page be open select: Solve by Completing the Square Then in rectangle type : 2 x ^ 2 + x + 1 = 0 and click option : solve ...
*October 30, 2013*

**math help plzzzz!!!!**

1. 0.32 = 32 / 100 = 4 * 8 / ( 4 * 25 ) = 8 / 25 2. 2 + 1 / 2 + 2 / 5 = 2 + 5 * 1 / ( 5 * 2 ) + 2 * 2 / ( 5 * 2 ) = 2 + 5 / 10 + 4 / 10 = 2 + 9 / 10 3. The number raised to the zero power is equal to one. ( 1 / 5 ) ^ 0 = 1 4. 840,000 = 8.4 * 100 * 1,000 = 8.4 * 10 ^ 2 * 10 ^ 3...
*October 30, 2013*

**Math**

5 ^ 2 = 25 7 ^ 5 = 16,807 5 ^ 2 - x = 7 ^ 5 x + 7 25 - x = 16,807 x + 7 Add x to both sides 25 - x + x = 16,807 x + 7 + x 25 = 16,808 x + 7 Subtract 7 to both sides 25 - 7 = 16,808 x + 7 - 7 18 = 16,808 x Divide both sides by 16,808 18 / 16,808 = 16,808 x / 16,808 18 / 16,808...
*October 26, 2013*

**Math.. Please help!**

If your expression mean: ( 3 ^ 4 * 2 ^ 3 * 5 ^ 2 ) / ( 3 ^ 2 * 5 * 2 ^ 3 ) Then: ( 3 ^ 4 * 2 ^ 3 * 5 ^ 2 ) / ( 3 ^ 2 * 5 2 ^ 3 ) = ( 81 * 8 * 25 ) / ( 9 * 5 * 8 ) = 81 * 25 / ( 9 * 5 ) = ( 9 * 9 * 5 * 5 ) /( 9 * 5 ) = 9 * 5 = 45 ________________________________________ Remark...
*October 23, 2013*

**math**

73 = 19 + 9 * 6 76 = 9 * 9 + 1 - 6 77 = 96 - 19
*October 23, 2013*

**Math-Algebra**

h = sqrt ( 40000 * j ^ 8 ) = sqrt (40000 ) * sqrt ( j ^ 8 ) = 200 j ^ 4
*October 22, 2013*

**Math**

Sorry, my mistake. x = number of correct answers y = number of incorrect answers x + y = 20 Subtract y to both sides x + y - y = 20 - y x = 20 - y Numbers of points : x * 5 + y * ( - 2 ) = 51 5 x - 2 y = 51 5 ( 20 - y ) - 2 y = 51 100 - 5 y - 2 y = 51 100 - 7 y = 51 Subtract ...
*October 22, 2013*

**Math**

11 * 5 = 11 * 5 points for each correct answer = 55 2 * 2 = 2 * 2 deducted points each incorrect answer Formula : 11 * 5 - 2 * 2 = 55 - 4 = 51 points 11 correct answers
*October 22, 2013*

**algebra**

x ^ 2 − 10 x + 20 = 0 Subtact 20 from both sides x ^ 2 − 10 x + 20 - 20 = 0 - 20 x ^ 2 − 10 x = - 20 ________________________________________ Take one half of the coefficient of x and square it. In this case [ ( 1 / 2 ) * 10 ] ^ 2 = 5 ^ 2 = 25 ...
*October 22, 2013*

**math**

Yes
*October 19, 2013*

**MATH MS.SUE HELP PLEASE!**

1. Pythagorean theorem c = sqrt ( a ^ 2 + b ^ 2 ) c = sqrt ( 9 ^ 2 + 12 ^ 2 ) c = sqrt ( 81 + 144 ) c = sqrt ( 225 ) c = 15 Answer C 2. Pythagorean theorem b = sqrt ( c ^ 2 - a ^ 2 ) b = sqrt ( 13 ^ 2 - 5 ^ 2 ) b = sqrt ( 169 - 25 ) b = sqrt ( 144 ) b = 12 Answer D 3. ...
*October 18, 2013*

**Algebra 1, Math**

Paste this question in google you will find many answers.
*October 16, 2013*

**Math**

( 2 / 8 ) = ( 2 * 1 ) / ( 2 * 4 ) = 1 / 4 = 0.25
*October 15, 2013*

**geomrtry**

Type your question in google. When you see list of results go on : c a . a n s w e r s . y a h o o . c o m
*October 15, 2013*

**algebra**

( 2 x - 6 ) - ( 3 x - 4 ) = - ( - 4 + x ) - 4 x + 6 2 x - 6 - 3 x - ( - 4 ) = - ( - 4 ) + ( - x ) - 4 x + 6 2 x - 6 - 3 x + 4 = 4 - x - 4 x + 6 2 x - 3 x - 6 + 4 = 4 + 6 - x - 4 x - x - 2 = 10 - 5 x Add 5 x to both sides - x - 2 + 5 x = 10 - 5 x + 5 x 4 x - 2 = 10 Add 2 to ...
*October 14, 2013*

**Algebra Homework, HELP!**

In Question 5 delete W ^ 2 - 15 W + 54 = 0 Divide both sides by 2
*October 14, 2013*

**Algebra Homework, HELP!**

1 ) W = 4 L - 3 A = L * W = 297 L * ( 4 L - 3 ) = 297 4 L ^ 2 - 13 L = 297 Subtract 297 to both sides 4 L ^ 2 - 3 L - 297 = 297 - 297 4 L ^ 2 - 3 L - 297 = 0 Solutions : L = - 33 / 4 and L = 9 The length can't be negative so L = 9 in W = 4 L - 3 W = 4 * 9 - 3 W = 36 - 3 W...
*October 14, 2013*

**Math**

( - 8 ) ^ ( - 6 ) = 1 / ( - 8 ) ^ 6 = 1 / 8 ^ 6 = 1 / 262144
*October 11, 2013*

**Math**

sqrt ( 8 ) ^ 3 = sqrt ( 8 ) * sqrt ( 8 ) * sqrt ( 8 ) = sqrt ( 8 ) ^ 2 * sqrt ( 8 ) = 8 * sqrt ( 8 ) = 8 * sqrt ( 4 * 2 ) = 8 * sqrt ( 4 ) * sqrt ( 2 ) = 8 * 2 * sqrt ( 2 ) = 16 * sqrt ( 2 )
*October 2, 2013*

**math**

( 2 ^ 4 ) ^ 3 = ( 2 ^ 3 ) ^ 4 = 8 ^ 4 64 ^ 2 = ( 8 ^ 2 ) ^ 2 = 8 ^ 4
*October 2, 2013*

**Algebra 1**

1 ) | x - 2 | - 3 = 5 Add 3 to both sides | x - 2 | - 3 + 3 = 5 + 3 | x - 2 | = 8 x - 2 = + OR - 8 First solution : x - 2 = 8 Add 2 to both sides x - 2 + 2 = 8 + 2 x = 10 Second solution : x - 2 = - 8 Add 2 to both sides x - 2 + 2 = - 8 + 2 x = - 6 Solutions : x = - 6 and x = ...
*October 2, 2013*

**math**

If -16t^2+104 mean : - 16 t ^ 2 + 104 t then : in google type : quadratic equation online Wfen you see list of results click on : Free Online Quadratic Equation Solver: Solve by Quadratic Formula Select one of method. Then in rectangle type : - 16 t ^ 2 + 104 t = 169 and click...
*October 2, 2013*

**MATH**

Copy this question in google. When you see list of results click on : a n s w e r s . y a h o o . c o m
*October 1, 2013*

**Trig**

2x^2+2x>4 Divide both sides by 2 x ^ 2 + x > 2 ________________________________________ take one half of thje coefficient of x and square it. in this case ( 1 / 2 ) ^ 2 = 1 / 4 ________________________________________ Add 1 / 4 to both sides x ^ 2 + x + 1 / 4 > 2 + 1...
*September 29, 2013*

**algebra**

( 6 x + 9 ) ( x ^ 2 - 4 x + 5 ) = 6 x * x ^ 2 + 9 * x ^ 2 + 6 x * ( - 4 x ) + 9 * ( - 4 x ) + 6 x * 5 + 9 * 5 = 6 x ^ 3 + 9 x ^ 2 - 24 x ^ 2 - 36 x + 30 x + 45 = 6 x ^ 3 - 15 x ^ 2 - 6 x + 45 = 3 ( 2 x ^ 2 - 5 x - 2 x + 15 )
*September 20, 2013*

**algebra**

( 2 x ^ 2 - 5 x ^ 3 ) - ( 8 x ^ 2 - 7 x ^ 3 ) = 2 x ^ 2 - 5 x ^ 3 - 8 x ^ 2 + 7 x ^ 3 = - 6 x ^ 2 + 2 x ^ 3 = 2 x ^ 3 - 6 x ^ 2 = 2 x ^ 2 ( x - 3 )
*September 20, 2013*

**Math**

Slope : m = ( y2 - y1 ) / ( x2 - x1 ) In this case : x1 = a x2 = b y1 = 3 y2 = 2 m = ( y2 - y1 ) / ( x2 - x1 ) = 1 / 7 ( 2 - 3 ) / ( b - a ) = 1 / 7 - 1 / ( b - a ) = 1 / 7 Reciprocal value : - ( b - a ) = 7 - b + a = 7 a - b = 7
*September 14, 2013*

**Math**

5 x + 1 / 7 - 2 x - 6 / 4 = 3 x + 4 / 28 - 6 * 7 / 28 = 3 x + 4 / 28 - 42 / 28 = 3 x - 38 / 28 = 3 x - 2 * 19 / ( 2 * 14 ) = 3 x - 19 / 14
*September 11, 2013*

**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 click on : Solve by Completing the Square then type : 2x^2-5x-12=0 and click option : solve it! You will see ...
*September 10, 2013*

**math**

Lentgh of one rotation = Circumference of a circle = d * pi 63 cm = 0.63 m Circumference = 0.63 * 3.14159 = 1.9792017 m 2 km = 2,000 m 2,000 / 1.9792017 = 1,010.50843 1,011 complete rotations
*September 8, 2013*

**Algebra, HELP IM CLUELESS**

E = Eureka's Age R = Renton's Age E = R - 16 In 3 years Renton will be R + 3 Eureca will be E + 3 In 3 years Renton will be twice as old as Eureka. This mean : R + 3 = 2 ( E + 3 ) R + 3 = 2 ( R - 16 + 3 ) R + 3 = 2 ( R - 13 ) R + 3 = 2 R - 26 Add 26 to both sies R + 3...
*September 7, 2013*

**Algebra - Equations**

3 x y = 9 x z = 12 y z = 1 Divide by 3 x y = 3 x z = 4 y z = 1 / 3 x y = 1 / 3 Divide both sides by x y = 1 / ( 3 x ) 3 x z = 1 / 3 Divide both sides by 3 x z = 1 / ( 9 x ) 4 y z = 1 / 3 4 * 1 / ( 3 x ) * 1 / ( 9 x ) = 1 / 3 4 * 1 / ( 27 x ^ 2 ) = 1 / 3 4 / 27 x ^ 2 = 1 / 3 ...
*September 4, 2013*

**Math**

Equation of line through two points: y = y1 + [ ( y2 - y1 ) / ( x2 - x1 ) ] * ( x - x1 ) In this case : x1 = 150 y1 = 80 x2 = 50 y2 = 30 so : y = 80 + [ ( 30 - 80 ) / ( 50 - 150 ) ] * ( x - 150 ) y = 80 + [ ( - 50) / ( - 100) ] * ( x - 150 ) y = 80 + ( 1 / 2 ) * ( x - 150 ) y...
*September 4, 2013*

**Maths do not see my last question displayed wrong**

web adress: raisesmartkids dot net/presentations/Cutting.pptý
*August 31, 2013*

**Maths do not see my last question displayed wrong**

In google type : Cutting - Raise Smart Kids and download book
*August 31, 2013*

**Algebra 2 Reiny!**

( - 9 / 100 ) ( x - 10 ) ^ 2 + 9 = ( - 1 / 24 ) ( x - 12 ) ^ 2 + 6 - 9 * ( x ^ 2 - 2 * x * 10 + 10 ^ 2 ) / 100 + 9 = - 1 * ( x ^ 2 - 2 * x * 12 + 12 ^ 2 ) / 24 + 6 - 9 * ( x ^ 2 - 20 x * 10 + 100 ) / 100 + 9 = - 1 * ( x ^ 2 - 24 x + 144 ) / 24 + 6 Multiply both sides by 100 * ...
*August 29, 2013*

**math**

30 m = 6000 Divide both sides by 30 30 m / 30 = 6000 / 30 m = 200
*August 28, 2013*

**Maths**

n-th member in AP an = a1 + ( n - 1 ) d d = the difference between successive terms In this case : a11 = a1 + ( 11 - 1 ) d a11 = a1 + 10 d = 18 18 = 3 + 10 d Subtract 3 to both sides 18 - 3 = 3 + 10 d - 3 15 = 10 d Divide both sides by 10 15 / 10 = 10 d / 10 1.5 = d d = 1.5 ...
*August 28, 2013*

**math**

10 ^ 3 = 1.000 6.4 * 10 ^ 3 = 6.4 * 1.000 = 6.400
*August 27, 2013*

**maths**

3 cot ( theta ) = 4 Divide both sides by 3 cot ( theta ) = 4 / 3 sin ( theta ) = + OR - 1 / sqrt [ 1 + cot ( teta ) ^ 2 ] In this case : sin ( theta ) = + OR - 1 / sqrt [ 1 + ( 4 / 3 ) ^ 2 ] sin ( theta ) = + OR - 1 / sqrt ( 1 + 16 / 9 ) sin ( theta ) = + OR - 1 / sqrt ( 9 / 9...
*August 23, 2013*

**math**

20 % = 20 / 100 = 0.2 heart rate when not hibernating: 10 / 0.2 = 50 beats per minute
*August 23, 2013*

**math**

( 13 / 28 ) * 100 % = 0.4643 * 100 % = 46.43 %
*August 14, 2013*

**algebra**

Type this question in google. When you see list of results go on : openstudy dot com
*August 14, 2013*

**Pre-Calc**

Type your question in google. When you see list of results go on : a n s w e r s y a h o o dot com
*August 14, 2013*

**maths**

In quadratic equation: a x ^ 2 + b x + c expresion : delta = b ^ 2 - 4 a c is called the Discriminant When delta > 0 There is two real root When delta = 0 There is 2 equal real roots. ( The root is repeated. ) When delta < 0 There are two complex ( unreal ) roots. In ...
*August 11, 2013*

**maths**

Correction: - 110 k = 11 Divide both sides by - 110 k = 11 / - 110 k = - 1 / 10
*August 10, 2013*

**maths**

( x ^ 2 + 3 x + 1 ) / ( 2 x ^ 2 - 5 x + 2 ) = k Multiply both sides by 2 x ^ 2 - 5 x + 2 x ^ 2 + 3 x + 1 = k ( 2 x ^ 2 - 5 x + 2 ) x ^ 2 + 3 x + 1 = 2 k x ^ 2 - 5 k x + 2 k x ^ 2 + 3 x + 1 - 2 k x ^ 2 + 5 k x - 2 k = 0 ( 1 - 2 k ) x ^ 2 + ( 3 + 5 k ) x + 1 - 2 k = 0 y = ( 1 - ...
*August 10, 2013*

**Mathematics**

1. 2 / ( 2 / 3 ) = ( 2 / 1 ) / ( 2 / 3 ) = 2 * 3 / ( 1 * 2 ) = 6 / 2 = 3 ( 3 / 4 ) / ( 4 / 5 ) = 3 * 5 / ( 4 * 4 ) = 15 / 16 2 / ( 2 / 3 ) + ( 3 / 4 ) / ( 4 / 5 = 3 + 15 / 16 = 3 15 / 16 2. ( 2 / 3 ) / ( 5 / 6 ) = 2 * 6 / ( 3 * 5 ) = 12 / 15 = 3 * 4 / ( 3 * 5 ) = 4 / 5 2 / 5 ...
*August 7, 2013*

**Trigonometry**

________________________________________ Remark : ( cos x ) ^ 2 = 1 - ( sin x ) ^ 2 ________________________________________ 4 ( cos x ) ^ 2 - 4 sin( x ) - 5 = 0 4 [ 1 - ( sin x ) ^ 2 ] - 4 sin( x ) - 5 = 0 4 - 4 ( sin x ) ^ 2 - 4 sin ( x ) - 5 = 0 - 4 ( sin x ) ^ 2 - 4 sin ( ...
*July 31, 2013*

**Math**

6 5 / 6 = 6 + 5 / 6 = 6 + 5 * 3 / ( 6 * 3) = 6 + 15 / 18 6 5 / 6 - 17 / 18 = 6 + 15 / 18 -17 / 18 = 6 - 2 / 18 = 6 - 2 / ( 9 * 2 ) = 6 - 1 / 9 = 5 + 9 / 9 - 1 / 9 = 5 + 8 / 9 = 5 8 / 9
*July 24, 2013*

**Math**

2 / 3 = 2 * 4 / ( 3 * 4 ) = 8 / 12 1 / 6 = 1 * 2 / ( 6 * 2 ) = 2 / 12 2 / 3 + 1 / 6 + 11 / 12 = 8 / 12 + 2 / 12 + 11 / 12 = 21 / 12 = 3 * 7 / ( 3 * 4 ) = 7 / 4 = ( 4 + 3 ) / 4 = 4 / 4 + 3 / 4 = 1 + 3 / 4 = 1 3 / 4
*July 24, 2013*

**Math**

2002 = 2 * 7 * 11 * 13
*July 16, 2013*

**Math**

360 ° * 4 / 15 = 1440 ° / 15 = 96 ° Answer E
*July 15, 2013*

**Math**

sin ( 2 x ) = 2 sin x cos x sin ( 2 x ) + cos x = cos x ( 2 sin x + 1 )
*July 8, 2013*

**Math**

a = first number b = second number c = third number a = 4 b c = b + 9 a + b + c = 45 4 b + b + b + 9 = 45 6 b + 9 = 45 Subtract 9 to both sides 6 b + 9 - 9 = 45 - 9 6 b = 36 Divide both sides by 6 6 b / 6 = 36 / 6 b = 6 a = 4 b a = 4 * 6 = 24 c = b + 9 c = 6 + 9 = 15 First ...
*July 7, 2013*

**Math**

A ( - 3 , 2 ) mean : xA = - 3 yA = 2 B ( 3 , - 2 ) mean : xB = 3 yB = 2 x- coordinate of midpoint : xmid = ( xB + xA ) / 2 xmid = ( - 3 + 3 ) / 2 = 0 y- coordinate of midpoint : ymid = ( yB + yA ) / 2 ymid = ( - 2 + 2 ) / 2 = 0 Coordinates of the midpoint : ( 0 , 0 ) AB = sqrt...
*July 6, 2013*

**algebra1please look over THANK YOU**

point ( 2, 15 ) mean : x = 2 y = 15 A ) 15 < - ( 2 ) ^ 2 - 4 * 2 + 1 15 < - 4 - 8 + 1 15 < - 11 Incorrect B ) 15 > - ( 2 ) ^ 2 - 4 * 2 15 > - 4 - 8 15 > - 12 Correct C ) 15 < 2 * 2 ^ 2 + 3 * 2 + 1 15 < 2 * 4 + 6 + 1 15 < 8 + 6 + 1 15 < 15 ...
*July 6, 2013*

**algebra1 HELP PLEASE**

( 2 + 6 i ) ( - 1 + 6 i ) = ( - 1 ) * 2 + ( - 1 ) * 6 i + 6 i * 2 + 6 i * 6 i = - 2 + ( - 6 i ) + 12 i + 36 i ^ 2 = - 2 - 6 i + 12 i + 36 * i ^ 2 = - 2 - 6 i + 12 i + 36 * ( - 1 ) = - 2 - 6 i + 12 i - 36 = 6 i - 38
*July 6, 2013*

**algebra1please look over THANK YOU**

( - 4 * i ) ( - 4 * i) = ( - 4 i ) ^ 2 = ( - 4 ) ^ 2 * i ^ 2 = 16 * ( - 1 ) = - 16
*July 6, 2013*

**algebra1please look over THANK YOU**

Right
*July 6, 2013*

**algebra**

4 ^ ( 1 / 2 ) = sqrt ( 4 ) = + OR - 2 4 ^ ( - 1 / 2 ) sqrt ( 1 / 4 ) = + OR - 1 / 2
*July 6, 2013*

**trig**

1 min = 60 sec 36 / 60 = 6 * 6 / ( 6 * 10 ) = 2 * 3 * 6 / ( 6 * 10 ) = 2 * 3 / 10 = 2 * 3 / ( 2 * 5 ) = 3 / 5 = 0.6 revolutions per second
*July 6, 2013*

**trig**

1 h = 360 ° 1 h = 60 min 1 min = 360 ° / 60 = 6 ° 5 min = 5 * 6 ° = 30 ° 1 1 / 2 h = 1.5 h 1.5 * 360 ° = 540 °
*July 6, 2013*

**math**

If you want to see graph go on : wolframalpha dot com When page be open in rectangle type : intepolating polynomial {(-3,0),(-2,4), (-1,0), (0,-6),(1,-8), (2,0),(3,24)} and click option = You will see graph
*July 5, 2013*

**math**

Through n +1 points passing polynomial of degree n. In this case you have 7 points. Polynomial will be degree 6. Write the polynomial in this form : a * x ^ 6 + b * x ^ 5 + c * x ^ 4 + d * x ^ 3 + e * x ^ 2 + f *x + g = y Now put values of x an y in this equation. a * ( - 3...
*July 5, 2013*

**math**

( 16 * 12 ) / ( 4 * 8 ) = 192 / 32 = 6
*July 3, 2013*

**trigonmetry**

tan theta = sin theta / cos theta cot theta = cos theta / sin theta cot heta * sin theta - tan theta * cos theta = ( cos theta / sin theta ) * sin theta - ( sin theta / cos theta ) * cos theta = cos theta - sin thets
*July 3, 2013*

**Math**

dam = dekametre 1 dam = 10 m 315 / 10 = 31.5 315 m = 31.5 dam
*July 2, 2013*

**Math**

967 x ^ 3 + 567 x ^ 9 = x ^ 3 ( 967 + 576 x ^ 6 )
*June 28, 2013*

**maths**

1 min = 60 sec 1 sec = 1 / 60 min 360° / min = 360 ° / 60 = 6 ° / sec 1 rad = 180 ° / pi 1 ° = pi / 180 rad 6 ° * pi / 180 = pi / 30 rad / sec
*June 28, 2013*

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