Friday

December 19, 2014

December 19, 2014

Total # Posts: 1,775

**trig**

sin ( x ) * tan ( x ) = sin ( x ) * sin ( x ) / cos ( x ) = sin ^ 2 ( x ) / cos ( x )
*March 26, 2012*

**trig**

tan ( x ) = sin ( x ) / cos ( x ) sin ( x ) * tan ( x ) ) sin ( x ) * sin ( x ) / cos ( x ) = sin ^ 2 ( x ) / cos ( x ) cos( x )/ [ sin ( x ) * tan ( x ) ]= cos ( x ) / [ sin ^ 2 ( x ) / cos ( x ) ] = [ cos ( x ) / 1 ] / [ sin ^ 2 ( x ) / cos ( x ) ]= cos ( x ) * cos ( x ) / ...
*March 26, 2012*

**math problem**

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 + 14 x - 4 = 0 and click option: solve it! You wil see solution step-by-step
*March 26, 2012*

**algebra**

x + y = 38 x - y = 26 - x x + x - y = 26 2 x - y = 26 x - y = 26 - x is equivalet to : 2 x - y = 26 Your system is : x + y = 38 2 x - y = 26 Using Substitution Method. Expressing y as a function of x (from the first equation) x + y = 38 y = 38 - x Substituting this expression ...
*March 25, 2012*

**6th Grade Math**

All your answer is correct.
*March 22, 2012*

**trig**

x = 60 ° cos 60 ° = 1 / 2
*March 22, 2012*

**Calculus**

x1 = 2 x2 = -6 y1 = 3 y2 = 4 Length of first side : a = x1 - x2 a = 2 - ( - 6 ) a = 2 + 6 = 8 Length of second side : b = | ( y1 - y2 ) | b = | 3 - 4 | b = | - 1 | b = 1 P = 2 ( a + b ) P = 2 ( 8 + 1 ) P = 2 * 9 = 18 Remark : | | mean absolute value
*March 22, 2012*

**Match Check**

1 /0.125 = 80
*March 22, 2012*

**ALGEBRA**

Also you can in google type: half-life equation and click : en.wikipedia
*March 21, 2012*

**ALGEBRA**

Equation : N( t ) = N( 0 ) * ( 1 / 2 ) ^ [ t / t( 1 / 2) ] In this case : N ( 30 ) = 480 * ( 1 / 2 ) ^ ( 30 / 10 ) N ( 30 ) = 480 * ( 1 / 2 ) ^ 3 N ( 30 ) = 480 * 1 / 8 = 60 grams
*March 21, 2012*

**ALGEBRA**

After 10 days you have half left After 20 days that's half of the half again = a quarter After 30 days that's half of a quarter = an eighth 480 / 8 = 60 grams
*March 21, 2012*

**Math**

In google type : factor 81a^2 + 36a + 4 When you see lis of results: SOLUTION: Please help, factor the expression 81a^2-36ab+4b^2 ... algebra dotcom/.../Polynomials-and-rational-expressions.faq.questi
*March 21, 2012*

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: limit (x-sin(x))/(x-tan(x)) as x->0 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.
*March 21, 2012*

**math**

A = Area L = Lenght W = Width New lenght L = 125 + x New width W = 75 + x A = W * L A = ( 125 + x ) * ( 75 + x ) A = 75 * 125 + 75 * x + x * 125 + x * x A = 9375 + 75 x + 125 x + x ^ 2 A = x ^ 2 + 200 x + 9375
*March 21, 2012*

**maths**

x / 20 = 0.6 Multiply both sides by 20 20 x / 20 = 0.6 * 20 x = 12
*March 21, 2012*

**geometry**

trapezoid In google type : Only one pair of opposite sides is parallel When you see lis of resuts click on : Quadrilaterals - Square, Rectangle, Rhombus, Trapezoid ...
*March 19, 2012*

**precalc!!!!!**

( a - b ) * ( a ^ 2 + a * b + b ^ 2 ) = a * a ^ 2 + a * a * b + a * b ^ 2 - b * a ^ 2 - b * a * b - b * b ^ 2 = a ^ 3 + a ^ 2 * b + a * b ^ 2 - a ^ 2 * b - a * b ^ 2 - b ^ 3 = a ^ 3 - b ^ 3
*March 19, 2012*

**algebra**

x = - 1 y = - 3 A x – 4 y = 9 A * ( - 1 ) - 4 * ( - 3 ) = 9 - A + 12 = 9 - A = 9 - 12 - A = -3 Multiply both sides by - 1 A = 3 4 x + B y = –1 4 * ( - 1 ) + B * ( - 3 ) = - 1 - 4 - 3 B = - 1 - 3 B = - 1 + 4 - 3 B = 3 Divide both sides by - 3 B = 3 / - 3 B = - 1
*March 18, 2012*

**algebra**

2 x – 3 y = 10 Multiply both sides by 2 4 x - 6 y = 20 5 x + 2 y = 6 Multiply both sides by 3 15 x + 6 y = 18 4 x - 6 y = 20 + 15 x + 6 y = 18 ---------------- 4 x + 15 x - 6 y + 6 y = 20 + 18 19 x = 38 Divide both sides by 19 x = 38 / 19 x = 2 To get the value of y you ...
*March 18, 2012*

**Math**

CORRECTION: ( 2 x ^ 3 ) ^ ( - 3 ) = 2 ^ ( - 3 ) * x ^ [ 3 * ( - 3 ) ] = 2 ^ ( - 3 ) * x ^ ( - 9 ) 1 / ( 2 ^ 3 * x ^ 9 ) = 1 / 8 x ^ 9
*March 18, 2012*

**Math**

( x ^ 2 ) ^ 3 = x ^ 6 ( 2 x ^ 3 ) ^ ( - 3 ) = 2 ^ ( - 3 ) * x ^ [ ( - 3 ) * ( - 3 ) ] = 2 ^ ( - 3 ) * x ^ ( - 9 ) 1 / ( 2 ^ 3 * x ^ 9 ) = 1 / 8 x ^ 9 3 /( 4 x )^ 2 = 3 / ( 4 ^ 2 x ^ 2 ) = 1 / 16 x ^ 2 ( x ^ 2 )^ 3 ( 2 x ^ 3 )^ -3 / ( 4 x ) ^ 2 = x ^ 6 * 1 / 8 x ^ 9 * 1 / 16 x...
*March 18, 2012*

**algebra**

1. 1 h = 60 min 1 h 24 min = 84 min ( 7 / 2 ) * 84 min = 7 * 84 / 2 = 588 / 2 = 294 min 4 h = 4 * 60 = 240 min 294 min = 240 min + 54 min 294 min = 2 h 54 min 2. P = 2 l + 2 w P - 2 l = 2 w 2 w = P - 2 l Divide both sides by 2 w = ( P - 2 l ) / 2 OR w = ( P / 2 ) - l
*March 18, 2012*

**Math 2**

x = - 3 , y = 8 QUADRANT II arc tan ( sqrt 73 ) = 83.324408° tan ( theta ) = - sqrt ( 73 ) theta = 180 ° - 83.324408° theta = 96.675592° theta = 96° 40' 32"
*March 18, 2012*

**Math(Please check)**

If you must simplify your answer: x ^ 2 = 106.4 / 2.5 * ( 10 / 10 ) x ^ 2 = 1064 / 25 x ^ 2 = 4 * 266 / 25 x = sqrt ( 4 * 266 / 25 ) x = ± (2 / 5 ) * sqrt ( 266 )
*March 18, 2012*

**Math(Please check)**

2.5 * 10 ^ ( - 3) = ( 0.28 ) * ( 0.38 ) / x ^ 2 Multiply both sides by x ^ 2 2.5 * 10 ^ ( - 3) * x ^ 2 = ( 0.28 ) * ( 0.38 ) 2.5 * 10 ^ ( - 3) * x ^ 2 = 0.1064 Divide both sides by 2.5 * 10 ^ ( - 3) x ^ 2 = 0.1064 / 2.5 * 10 ^ ( - 3) x ^ 2 = 0.1064 * 10 ^ 3 / 2.5 Remark: 1 / ...
*March 18, 2012*

**Math help**

Not necessary. x intercept - 4 x - 3 = 0 - 4 x = 3 Divide both sides by - 4 x = - 3 / 4 A line passing through points : x = - 3 / 4 , y = 0 and x = 0 , y = - 3
*March 18, 2012*

**Math help**

In this case : slope = - 4 y intercept = - 3 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: -4x-3 And click option: Draw
*March 18, 2012*

**precalc!!!!!**

Go on calc 101 dot com When page be open click option : long division
*March 18, 2012*

**pre-calculus**

In google type : r=3cos2theta When you see list of results click on : Advanced Math: precal, trig identities, conversion You will see answer.
*March 18, 2012*

**Algebra**

Line x = 1 are parallel with y-axis and passing through point x = 1 The angle theta a line makes with the positive x axis is closely related to the slope m via the tangent function: m = tan ( theta ) In this case theta = 90 ° tan 90 ° = infinity Slope of line x = 1 m...
*March 18, 2012*

**Algebra**

y = m x + b m = slope b = y-intercept In this case : slope m = 5 / 3 y-intercept = - 3 y = ( 5 / 3 ) x + ( - 3 ) y = ( 5 / 3 ) x - 3
*March 18, 2012*

**algebra 2**

A = Area of the printed matter w = width a = 10 - 2 w b = 18 - 2 w ( 10 - 2 w ) * ( 18 - 2 w ) = A 18 * 10 - 18 * 2 w - 2 w * 10 - 2 w * ( - 2 w ) = A 180 - 36 w - 20 w + 4 w ^ 2 = A 4 w ^ 2 - 56 w + 180 - A = 0 Are you sre that the printed matter of a book must cover 0 cm ^ 2 ?
*March 18, 2012*

**algebra 2**

A = Area b = base h = height h = b + 3 A = b * h / 2 = 189 ft ^ 2 b * h / 2 = b * ( b + 3 ) / 2 = 189 Multiply both sides by 2 b * ( b + 3 ) = 378 b ^ 2 + 3 b - 378 = 0 The solutions are : b = 18 ft and b = - 21 ft The base can't be negative,so solution are : b = 18 ft h...
*March 18, 2012*

**Algebra1**

1 ft = 12 in 1 ft ^ 2 = ( 12 ^ 2 ) in ^ 2 1 ft ^ 2 = 144 in ^ 2 15 * 144 = 2160 15 ft ^ 2 = 2160 in ^ 2 2160 / 180 = 12 12 hours
*March 18, 2012*

**algebra**

Two point form of linear equation : y - y 1 = ( y 2 - y 1 ) * ( x - x 1 ) / ( x 2 - x 1 ) Te slope is explicitly given as m = ( y 2 - y 1) / ( x 2 - x 1 ) In this case : x 1 = - 2 x 2 = 3 y 1 = 8 y 2 = 5 m = ( y 2 - y 1 ) / ( x 2 - x 1 ) m = ( 5 - 8 ) / [ 3 - ( - 2 ) ] m = - 3...
*March 18, 2012*

**Math**

Factorisation : 4356 = 2 * 2 * 3 * 3 * 11 * 11 60 = 2 * 2 * 3 * 5 4356 / 60 = 2 * 2 * 3 * 3 * 11 * 11 / ( 2 * 2 * 3 * 5 ) = 3 * 11 * 11 / 5 = 363 / 5 = 72.6
*March 18, 2012*

**MAT/116**

- 1 + ( - 6) = - 1 - 6 = -7
*March 17, 2012*

**Algebra**

CORRECTION : When page be open in blue rectangle type: x ^ 2 - 55 x + 650 Set: Range x-axis from - 20 to 80 Range y-axis from - 200 to 800 And click option: Draw
*March 16, 2012*

**Algebra**

If you must draw function : L ^ 2 - 55 L + 650 = 0 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 - 55 x + 650 = 0 Set: Range x-axis from - 20 to 80 Range y-axis ...
*March 16, 2012*

**Algebra**

A = Area F = Fencing W = Width L = Length A = W * L = 650 m ^ 2 W * L = 650 Divide both sides by L W = 650 / L F = 2 W + 2 L = 2 ( W + L ) = 110 m 2 ( W + L ) = 110 Divide both sides by 2 W + L = 110 / 2 W + L = 55 650 / L + L = 55 Multiply both sides by L 650 + L * L = 55 L ...
*March 16, 2012*

**5th grade maths**

36 / 3 = 12 12 - 2 = 10 33 / 3 = 11 11 - 2 = 9 30 / 3 = 10 10 - 2 = 8 27 / 3 = 9 9 - 2 = 7 24 / 3 = 8 8 - 2 = 6 Your function : y = ( x / 3 ) - 2 When x decrease for 3 y decrease for 1
*March 14, 2012*

**GEOMETRY**

start -> Programs -> Accessories -> Calculator -> View -> Sceintific 4 ° 35 ' 19 "
*March 14, 2012*

**GEOMETRY**

81 ° 47 ' 12 "
*March 14, 2012*

**Algebra 1**

y = 6 x + 58 OR y + 14 = 6 x + 58 + 14 y + 14 = 6 x + 72 y + 14 = 6 ( x + 12 ) Ansver B is correct Proof: y + 14 = 6 ( x + 12 ) - 14 + 14 = 6 ( - 12 + 12 ) 0 = 6 * 0 0 = 0
*March 13, 2012*

**Algebra 1**

y = m x + b m = slope in tis case: m = 6 x = - 12 y = - 14 y = 6 x + b - 14 = 6 * ( - 12 ) + b - 14 = - 72 + b - 14 + 72 = b 58 = b b = 58 y = m x + b y = 6 x + 58
*March 13, 2012*

**Mathematics**

3 y = 84 - 6 x Divide both sides by 3 y = 28 - 2 x 3 x - 21 = 2 y 3 x - 21 = 2 ( 28 - 2 x ) 3 x - 21 = 56 - 4 x 3 x + 4 x = 56 + 21 7 x = 77 Divide both sides by 7 x = 77 / 7 x = 11 y = 28 - 2 x y = 28 - 2 * 11 y = 28 - 22 y = 6 D.6
*March 13, 2012*

**Math**

2 ( 4 y + 5 z ) - 10 z = 2 * 4 y + 2 * 5 z - 10 z = 8 y + 10 z - 10 z = 8 y
*March 13, 2012*

**math lit**

2 and half hours =120+30=150 min 2/150 = 1 exam/75 min
*March 13, 2012*

**Help! Math**

15 / 20 = 3 * 5 / ( 4 * 5 ) = 3 / 4 = 0.75 3 / 4 6 / 8 9 / 12 12 / 16 18 / 24
*March 13, 2012*

**Math(alg2)**

If 5(2)^2x - 4 = 13 mean 5 * [ 2 ^ ( 2 x ) ] - 4 = 13 then 5 * 2 ^ 2 x - 4 = 13 5 * 2 ^ 2 x = 13 + 4 5 * 2 ^ 2 x = 17 Divide both sides by 5 2 ^ 2 x = 17 / 5 2 x * log ( 2 ) = log ( 17 / 5 ) 2 x * log ( 2 ) = log ( 17 ) - log ( 5 ) Divide both sides by 2 log ( 2) x = [ log ( ...
*March 13, 2012*

**Math - HELP !**

31 students are in the drama club.
*March 10, 2012*

**Math - HELP !**

62 % = 62 / 100 62 * 50 / 100 = 3100 / 100 = 31 Proof: ( 31 / 50 ) * 100 % = 3100 % / 50 = 62 %
*March 10, 2012*

**math**

True. 40 = 2 * 2 * 2 * 5 100 = 2 * 2 * 5 * 5 40 % = 40 / 100 = ( 2 * 2 * 2 * 5 ) / ( 2 * 2 * 5 * 5 ) = 2 / 5 OR ( 2 / 5 ) * 100 % = 0.4 * 100 % = 40 %
*March 10, 2012*

**Math: Limits**

Go on : wolframalpha dot com When page be open in rectangle type : limit 6e^(x − 5) as x->5 and click option = When you see result click option: Show steps
*March 10, 2012*

**Algebra **

W = Width = 7 cm L = Length A = Area A = W * L A < 161 cm ^ 2 W * L < 161 7 * L < 161 Divide both sides by 7 L < 161 / 7 L < 23 cm
*March 10, 2012*

**math**

40 + ( x - 600 ) * 0.35 = 50 + ( x - 600 ) * 0.1 40 + 0.35 x - 600 * 0.35 = 50 + 0.1 x - 600 * 0.1 40 + 0.35 x - 210 = 50 + 0.1 x - 60 0.35 x - 170 = 0.1 x - 10 0.35 x - 0. 1 x = - 10 + 170 0.25 x = 160 Divide both sides by 0.25 x = 160 / 0.25 = 160 * 4 x = 640 Remark : ...
*March 10, 2012*

**algebra**

( 75 + 82 + 90 + 84 + 71 + n ) / 6 > OR = 80 Multiplly both sides by 6 75 + 82 + 90 + 84 + 71 + n > OR = 6 * 80 402 + n > OR = 480 n > OR = 480 - 402 n > OR = 78
*March 7, 2012*

**math**

1.) 19 / n = 0.76 Multiply both sides by n 19 = n * 0.76 Divide both sides by 0.76 19 / 0.76 = n 25 = n n = 25 2.) n : 20 = 0.55 Multiply both sides by 20 n = 0.55 * 20 n = 11 3.) n = 1 : 10 n = 0.1 4.) n % = 1 : 100 1 % = 1 : 100 5.) n % = 33 : 100 33 % = 33 : 100 6.) 99 % = ...
*March 7, 2012*

**Calculus-verify**

Your ansver is correct. Go on : calc101 dot com When page be open click option : derivatives When page be open in rectangle type: 5/3x^3-x^(3/2)+6 and click option : DO IT You will see solution step by step
*March 7, 2012*

**Math problem solvimg**

( 67 + x ) / ( 19 + x ) = 3 Multiply blth sides by ( 19 + x ) 67 + x = 3 ( 19 + x ) 67 + x = 3 * 19 + 3 * x 67 + x = 57 + 3 x 67 - 57 = 3 x - x 10 = 2x 2 x = 10 Divide both sides by 2 x = 10 / 2 x = 5 Salys age will be 19 + 5 = 24 Granfathes age will be 37 + 5 = 72 72 / 24 = 3
*March 6, 2012*

**math**

5 ^ 2 = 5 * 5 = 25 15 * ( 80 + 170 ) / 5 ^ 2 = 15 * ( 80 + 170 ) / 25 = 15 * 250 / 25 = 15 * 10 = 150 2 ^ 4 = 2 * 2 * 2 * 2 = 16 2 ^ 7 = 2 * 2 * 2 * 2 * 2 * 2 * 2 = 128 160 / 2 ^ 4 + 2 ^ 7 - 75 = 160 / 16 + 128 - 75 = 10 + 128 - 75 = 63
*March 4, 2012*

**trig and geometry**

A ) tan ( 42 ° ) = H / 75 H = 75 tan 42 ° H = 75 * 0.9004 H = 67.53 m B ) tan ( theta ) = H / ( 75 + 30 ) tan ( theta ) = H / 105 tan ( theta ) = 67.53 / 105 tan ( theta ) = 0.643143 theta = 32 ° 44 ' 49 "
*March 2, 2012*

**ap**

An arithmetic progression (A.P) or arithmetic sequence is a sequence of numbers such that the difference between the consecutive terms is constant. If the initial term of an arithmetic progression is a1 and the common difference of successive members is d, then the nth term of...
*March 1, 2012*

**math**

The center placed in the point (0,0) radius = sqrt ( 36 ) = 6
*March 1, 2012*

**math**

a n = - 2 ( n - 3 ) n = 19 a 19 = - 2 ( 19 - 3 ) a 19 = - 2 * 16 a 19 = - 32
*March 1, 2012*

**math please**

If g ( c ) = 19 - c 2 mean g ( c ) = 19 - c ^ 2 then g ( c ) = 19 - 4 ^ 2 g ( c ) = 19 - 16 g ( c ) = 3
*March 1, 2012*

**math**

32 77 - 64 = 13 64 - 53 = 11 53 - 44 = 9 44 - 37 = 7 37 - 32 = 5
*March 1, 2012*

**Calculus Help!**

Go on : calc101 dot com When page be open click option : derivatives When page be open in rectangle type: 8 sin [ cos [ x ^ 6 ] ] and click option : DO IT You will see solution step by step Then in rectangle type : cos [ sin [ x ^ 2 ] ] and click option : DO IT
*February 28, 2012*

**calculus**

log ( a ^ n ) = n log ( a ) x log ( 5 ) = log ( 100 ) Divide both sides by log ( 5 ) x = log ( 100 ) / log ( 5 ) x = 2.8613531 5 ^ 2.8613531 = 100
*February 27, 2012*

**maths**

5 + 3 cosec ^ 2 (theta) = 8 3 cosec ^ 2 (theta) = 8 - 5 3 cosec ^ 2 (theta) = 3 Divide both sides by 3 cosec ^ 2 (theta) = 3 / 3 cosec ^ 2 (theta) = 1 cosec (theta) = sqrt ( 1 ) cosec (theta) = + OR - 1 cosec ( theta ) = 1 / sin ( theta ) sin ( theta ) = 1 / cosec ( theta ) ...
*February 27, 2012*

**arithmetic**

An arithmetic progression (A.P) or arithmetic sequence is a sequence of numbers such that the difference between the consecutive terms is constant. If the initial term of an arithmetic progression is a1 and the common difference of successive members is d, then the nth term of...
*February 27, 2012*

**math**

2. x = 2 y = 3 translated to ( 7 , - 1 ) 7 - 2 = 5 - 1 - 3 = - 4 a) translate right 5 , down 4 3. x = - 5 y = - 8 When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite. c ) ( 5 , -8 )
*February 27, 2012*

**Algebra; MAJOR HELP**

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: s ^ 2 - 7 s + 14 = 2 and click option: solve it! You wil see solution step-by-step
*February 26, 2012*

**math**

There are b boys an g girls in the class b / g = 8 / 17 Multiply both sides by g b = 8 g / 17 b + g = 375 8 g / 17 + g = 375 8 g / 17 + 17 g / 17 = 375 25 g / 17 = 375 Multiply both sides by 17 25 g = 375 * 17 25 g = 6375 Divide both sides by 25 g = 6375 / 25 g = 255 b = 375...
*February 26, 2012*

**Math Help**

5 / 22 t = 2 * 5 / ( 2 * 22 ) t = 10 / 44 t 2 / 4 t = 2 * 11 / ( 4 * 11 ) t = 22 / 44 t 5 / 22 t + 2 / 4 t = 10 / 44 t + 22 / 44 t = 32 / 44 t = ( 4 * 8 ) / ( 4 * 11 ) t = 8 / 11 t
*February 26, 2012*

**Math**

You must solve two quadratic equations. 0.02 s ^ 2 + 1.1 s = 51 and 0.02 s ^ 2 + 1.1 s = 315.12 If you dont know how solve equations in google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic ...
*February 25, 2012*

**Algebra; HELP**

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: 3x^2+18x+24=0 and click option: solve it! You wil see solution step-by-step
*February 23, 2012*

**Algebra: Help Please**

x = - 1 8 ^ - 1 = 1 / 8 x = - 2 8 ^ - 2 = 1 / 8 ^ 2 = 1 / 64 x = - 3 8 ^ - 3 = 1 / 8 ^ 3 = 1 / 512
*February 23, 2012*

**Algebra: Help Please**

f ( x ) = 8 ^ x x = 0 8 ^ 0 = 1 x = 1 8 ^ 1 = 8 x = 2 8 ^ 2 = 64 x = 3 8 ^ 3 = 512
*February 23, 2012*

**Math**

( - 2 q ^ 2 + q + 3 ) - 5 ( q ^ 2 + 2 q - 1 ) = - 7 q ^ 2 - 9 q + 8
*February 22, 2012*

**Math**

a ) ( 4 d - 6 )( - 3 d ) = 4 d * ( - 3 d ) - 6 * ( - 3 d ) = - 12 d ^ 2 + 18 d b ) 5 g ( g ^ 2 - 2 g + 1 ) = 5 g * g ^ 2 - 5 g * 2 g + 5 g * 1 = 5 g ^ 3 - 10 g ^ 2 + 5 g c ) ( - 2 q ^ 2 + q + 3 ) - 5 ( q ^ 2 + 2 q - 1 ) = - 2 q ^ 2 + q + 3 - 5 q ^ 2 - 10 q + 5 = - 2 q ^ 2 - 5 ...
*February 22, 2012*

**pre-cal**

log ( a ^ n ) = n * log ( a ) ( 2 x - 1 ) * log ( 4 ) = log ( 6 ) Divide both sides by log ( 4 ) 2 x - 1 = log ( 6 ) / log ( 4 ) 2 x = log ( 6 ) / log ( 4 ) + 1 2 x = log ( 6 ) / log ( 4 ) + log ( 4 ) / log ( 4 ) 2 x = [ log ( 6 ) + log ( 4 ) ] / log 4 2 x = log ( 24 ) / log...
*February 19, 2012*

**arithmetic**

6 ( x - 6 ) + 2 = 8 ( x + 2 ) - 8 6 * x + 6 * ( - 6 ) + 2 = 8 * x + 8 * 2 - 8 6 x - 36 + 2 = 8 x + 16 - 8 6 x - 34 = 8 x + 8 6 x - 8 x = 8 + 34 - 2 x = 42 Divide both sides by - 2 x = 42 / ( - 2 ) x = - 21
*February 19, 2012*

**math**

In google type : csc20° − cot 40° When you see list of result click on : What is csc(20) - cot(40)? or csc(pi/9) - cot(2pi/9) You will see solution step by step.
*February 16, 2012*

**math**

8 / 12 = 4 * 2 / (4 * 3 ) = 2 / 3 hours / lawnmower 30 * 2 / 3 = 60 / 3 = 20 hours OR 8 / 12 = x / 30 8 * 30 = 12 * x 240 = 12 x Divide both sides by 12 240 / 12 = x 20 = x x = 20 hours OR 30 / 12 = 2.5 2.5 * 8 = 20 hours
*February 15, 2012*

**Math**

3 k / 4 - 28 - 2 k / 3 = 37 Multiply both sides by 4 ( 3 k / 4 ) * 4 - 28 * 4 - 2 k * 4 / 3 = 37 * 4 3 k - 112 - 8 k / 3 = 148 Multiply both sides by 3 3 k * 3 - 112 * 3 - ( 8 k / 3 ) * 3 = 148 * 3 9 k - 336 - 8 k = 444 9 k - 8 k = 444 + 336 k = 780
*February 15, 2012*

**quadratic equation**

If your expressions mean : x ^ 2 - 9 x = 0 x ^ 2 +8 x = 0 x ^ 2 = 6 x x ^ 2 = - 3 x Then 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 your ...
*February 15, 2012*

**Algebra 2**

The term b ^ 2 - 4 a c is called the discriminant and gives important information about the number and nature of the solutions to the quadratic equation to be solved. Three cases are possible: If D > 0, the equation has 2 real solutions. If D = 0, the equation has 1 real ...
*February 15, 2012*

**algebra**

w = the number of WHITE ribbions
*February 14, 2012*

**algebra**

b = the number of blue ribbions w = the number of blue ribbions r = the number of red ribbions b = w - 2 r = w + 3 w + b + r = 43 w + w - 2 + w + 3 = 43 3 w - 2 + 3 = 43 3 w + 1 = 43 3 w = 43 - 1 3 w = 42 Divide both sides by 3 w = 42 / 3 w = 14 b = w - 2 = 14 - 2 = 12 r = w...
*February 14, 2012*

**Algebra**

a = age of the twins b = age of the third child b = a - 3 a + a + b = 42 2 a + b = 42 2 a + a - 3 = 42 3 a - 3 = 42 3 a = 42 + 3 3 a = 45 Divide both sides by 3 a = 45 / 3 a = 15 b = 15 - 3 b = 12
*February 14, 2012*

**math**

x = The number of sweets in container x y = The number of sweets in Container y x = 24 + y OR y = x - 24 When you removed 42 sweets from container x then numers of sweets in container x became: x - 42 Numbers of sweets in container y became: y + 42 = thrice of ( x - 42 ) = 3...
*February 13, 2012*

**Math**

4 / 5 - 2 p / 5 = 6 / 5 Multiply both sides by 5 4 - 2 p = 6 - 2 p = 6 - 4 - 2 p = 2 Divide both sides by -2 p = 2 / ( - 2 ) p = - 1
*February 11, 2012*

**Math**

a x ^ 2 + b x + c = 0
*February 11, 2012*

**Math**

My answer is also numbers of girls g = 25
*February 11, 2012*

**Math**

b = numbers of boys g = numbers of girls Ratio of boys to girls: b / g = 3 / 5 Multiply both sides by 5 5 b / g = 3 Multiply both sides by g 5 b = 3 g Divide both sides by 5 b = 3 g / 5 After adding ratio is : ( b + 5 ) / ( g + 3 ) = 5 / 7 [ ( 3 g / 5 ) + 5 ] / ( g + 3 ) = 5...
*February 11, 2012*

**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 ...
*February 10, 2012*

**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...
*February 9, 2012*

**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...
*February 8, 2012*

**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
*February 7, 2012*

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