Monday

August 31, 2015
Total # Posts: 1,911

**Trig.**

Go on: wolframalpha dot com When page be open in rectangle type: solve 2tan^2è-2tanè=3 and click option = After few seconds when you see result click option: Show steps Solutions are : è = -58.71608 ° è = - 59 ° to the nearest degree and &...
*April 5, 2012*

**Alebra**

Divided by zero is undefined When: x - 2 = 0 x = 2 your expression is undefined.
*April 5, 2012*

**algebra**

t = 14 min M = −0.001 * t ^ 3 + 0.1 * t ^ 2 M = −0.001 * 14 ^ 3 + 0.1 * 14 ^ 2 M = −0.001 * 2744 + 0.1 * 196 M = - 2.744 + 19.6 M = 16.856 words
*April 5, 2012*

**Math-alg-calc**

x ^ ( - 1 / 7 ) = ( 1 / 2 ) mean 1 / seventh root of ( x ) = 1 / 2 reciprocal value: seventh root of ( x ) = 2 Raise both sides to the power of 7 [ seventh root of ( x ) ] ^ 7 = 2 ^ 7 x = 2 ^ 7 = 128
*April 5, 2012*

**Math**

a 1 = first number a 2 = a 1 + 1 = second number a 3 = a 1 + 2 = third number a 4 = a 1 + 3 = fourth number a 5 = a 1 + 4 = fifth number a 6 = a 1 + 5 = sixth number a 7 = a 1 + 6 = seventh number a 8 = a 1 + 7 = eighth numer a 9 = a 1 + 8 = ninth number a 10 = a 1 + 9 = tenth...
*April 4, 2012*

**Intermediate Algebra**

9 x ^ 2 + 5 x - 4 + ( - 8 x ^ 2 + 9 x - 9 ) = 9 x ^ 2 + 5 x - 4 - 8 x ^ 2 + 9 x - 9 = 9 x ^ 2 - 8 x ^ 2 + 5 x + 9 x - 4 - 9 = x ^ 2 + 14 x - 13
*April 3, 2012*

**MathLog#4**

1 / a - 1 / b = c 1 / a = c - 1 / b 1 / a = c b / b - 1 / b 1 / a = ( c b - 1 ) / b Reciprocal : a = b / ( c b - 1 )
*April 2, 2012*

**MATH HELP!**

n * ln ( a ) = ln ( a ^ n ) 2 ln ( x ) = ln ( x ^ 2 ) 3 ln ( y ) = ln ( y ^ 3 ) ( 1 / 2 ) ln ( z ) = ln [ z ^ ( 1 / 2 ) ] = ln [ sqrt ( z) ] ln ( a ) + ln ( b ) = ln ( a * b ) ln ( a ) - ln ( b ) = ln ( a / b ) In this case: 2 ln ( x ) - 3 ln ( y ) + ( 1 / 2 ) ln ( z ) = 2 ln...
*April 1, 2012*

**Trigonometry**

cos ^ 2 ( x ) = 1 - sin ^ 2 ( x ) sin ^ 2 ( x ) - cos ^ 2 ( x ) = 0 sin ^ 2 ( x ) - [ 1 - sin ^ 2 ( x ) ] = 0 sin ^ 2 ( x ) - 1 + sin ^ 2 ( x ) = 0 2 sin ^ 2 ( x ) - 1 = 0 2 sin ^ 2 ( x ) = 1 Divide both sides by 2 sin ^ 2 ( x ) = 1 / 2 sin ( x ) = ± 1 / sqrt ( 2 ) ...
*April 1, 2012*

**Intermediate Algebra**

A. x = 5 f ( 5 ) = 2 * 5 + 3.50 = 10 + 3.50 = 13.50 $ B. x = 3 / 4 f ( 3 / 4 ) = 2 * 3 / 4 + 3.50 = 6 / 4 + 3.50 = 6 / 4 + 7 / 2 = 6 / 4 + 14 / 4 = 20 / 4 = 5 $ C. f ( x ) = 50 50 = 2 x + 3.5 50 - 3. 5 = 2 x 46 . 5 = 2 x Divide both sides by 2 46.5 / 2 = x 23.25 = x x = 23.25 ...
*April 1, 2012*

**Math situations**

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: 2 x ^ 2 - 3 x = - 6 and click option: solve it! You wil see solution step-by-step
*March 31, 2012*

**Math**

When the leading coefficient a is positive, the parabola opens up ( concave up ) For function: x ^ 2 - 2 x - 8 the leading coefficient is a = 1 function is concave up When the parabola ia concawe up all walues between roots are negative. No negative number can have a real ...
*March 31, 2012*

**algebra**

V = r ^ 2 * pi * h V = 8 ^ 2 * pi * 12 V = 64 * pi * 12 V = 2412.743 ft ^ 3
*March 31, 2012*

**maths**

252 = 2 * 2 * 3 * 3 * 7
*March 31, 2012*

**Algebra**

C = Circumference A = Area r = Radius C = 2 r pi Divide both sides with 2 pi C / 2 pi = r r = C / 2 pi A = r ^ 2 pi A = ( C / 2 pi ) ^ 2 * pi A = ( C ^ 2 / 4 pi ^ 2 ) * pi A = C ^ 2 / 4 pi A = 25 ^ 2 / 4 pi A = 625 / ( 4 * 3. 14 ) A = 625 / 12.56 A = 49.761 m ^ 2 A = approx. ...
*March 30, 2012*

**algebra**

a + 6 b = 14 - a - 2 b = - 2 --------------- 6 b - 2 b = 14 - 2 4 b = 12 Divide both sides by 4 b = 12 / 4 b = 3 a + 6 b = 14 a + 6 * 3 = 14 a + 18 = 14 a = 14 - 18 a = - 4
*March 30, 2012*

**math**

A = Area W = Width L = Length P = Perimeter A = W * L 54 = W * 9 Divide both sides by 9 54 / 9 = W 6 = W W = 6 ft P = 2 ( W + L ) P = 2 ( 9 + 6 ) P = 2 * 15 P = 30 ft
*March 30, 2012*

**Math situation**

( a - 4 ) ^ 2 = a ^ 2 - 2 * a * 4 + 4 ^ 2 = a ^ 2 - 8 a + 16 2 a ^ 2 -1 6 a + 32 = 2 * [ ( a - 4 ) ]^ 2 ( 64 a ^ 2 ) / ( 2 a ^ 2 - 16 a + 32 ) * ( 2 a - 8 ) / 8 a = ( 64 a ^ 2 / 8 a ) * ( 2a - 8 ) / 2 * [ ( a - 4 ) ] ^ 2 = 8 a * ( 2 a - 8 ) / [ 2 * [ ( a - 4 ) ]^ 2 = [ 8 a * 2...
*March 30, 2012*

**algebra**

r ^ 3 + 216 / r + 6 = r ^ 3 * r / r + 216 / r + 6 r / r = ( r ^ 4 + 216 + 6 r )/ r= ( r ^ 4 + 6 r + 216 ) / r
*March 30, 2012*

**math problem**

All parts of the uneqiations must be large of 0 Less part is ( x - 12 ) Solution x > 12
*March 30, 2012*

**Calculus**

Go on: wolframalpha dot com When page be open in rectangle type: partial fractions (x - x^3) / (x^4 +1) and click option = After few seconds when you see result click option: Show steps Then type: integrate (x - x^3) / (x^4 +1) After few seconds when you see result click ...
*March 30, 2012*

**algebra**

m = 0 b = - 4 y = mx + b y = 0 * x + ( - 4 ) y = 0 - 4 y = - 4
*March 30, 2012*

**Math Problem**

c ^ 16 = c ^ 7 * c ^ 9 c ^ 7 / ( c ^ 7 * c ^ 9 ) = 1 / c ^ 9 = c ^ - 9
*March 30, 2012*

**math**

( 1 / 2 ) x + 360 = ( 4 / 5 ) x 360 = ( 4 / 5 ) x - ( 1 / 2 ) x 360 = ( 8 / 10 ) x - ( 5 / 10 ) x 360 = ( 3 / 10 ) x ( 3 / 10 ) x = 360 Multiply both sides by 10 3 x = 360 * 10 3 x = 3600 Divide both sides by 3 x = 3600 / 3 x = 1200 pennies
*March 30, 2012*

**math problem**

- 12 a ^ 2 + 3 a + 3 - ( 6 a ^ 2 + 3 ) = - 12 a ^ 2 + 3 a + 3 - 6 a ^ 2 - 3 = - 12 a ^ 2 - 6 a ^ 2 + 3 a + 3 - 3 = - 18 a ^ 2 + 3 a = 3 a ( - 6 a + 1 ) = 3 a ( 1 - 6 a ) = -3 a ( 6 a - 1 )
*March 30, 2012*

**Math11**

A) 1 / 128 B ) 30 * 128 = 3840 cm = 38.4 m Remark: 1 m = 100 cm 3840 cm / 100 cm = 38.4 m
*March 30, 2012*

**Intermediate Algebra**

2.43 * 10 ^ - 4
*March 30, 2012*

**Tech math**

y = sin ( 2 x + 75 ° ) x = 295 ° y = sin ( 2 * 295 ° + 75 ° ) y = sin ( 590 ° + 75 ° ) y = sin ( 665 ° ) y = sin ( 360 ° + 305 ° ) ------------------------------------ Remark: sin ( 360 ° + theta ) = sin ( theta...
*March 30, 2012*

**Math**

1 revolution = 2 pi radians 450 pi / 2 pi = 225 revolutions
*March 30, 2012*

**Math**

1 2 5 10 17 26 37 50 65 82 If you subtract 1 from every number is should be obvious. 0 1 4 9 16 25 36 64 81 These are the perfect squares. So the answer is: n ^ 2 + 1 Next nunbers : 10 ^ 2 + 1 = 100 + 1 =101 11 ^ 2 + 1 = 121 + 1 = 122 13 ^ 2 + 1 = 169 + 1 = 170 14 ^ 2 + 1 = ...
*March 30, 2012*

**math**

1 - ( 1 / 2 + 1 / 3 ) = 1 - ( 3 / 6 + 2 / 6 ) = 1 - 5 / 6 = 6 / 6 - 5 / 6 = 1 / 6
*March 29, 2012*

**trig**

2 sin ^ 2 ( x ) - 1 = 0 2 sin ^ 2 ( x ) = 1 Divide both sides by 2 sin ^ 2 ( x ) = 1 / 2 sin ( x ) = ± 1 / sqrt ( 2 ) sin ( x ) = 1 / sqrt ( 2 ) for x = pi / 4 and x = 3 pi / 4 sin ( x ) = - 1 / sqrt ( 2 ) for x = 5 pi / 4 and x = 7 pi / 4
*March 29, 2012*

**geometry**

350 * 24 * 30 / ( 8 * 10 ) = 350 * 720 / 80 = 350 * 9 = 3150 $
*March 29, 2012*

**Geometry**

2 / 5 = 7 / x Multiply both sides by x 2 x / 5 = 7 Multiply both sides by 5 2 x = 7 * 5 2 x = 35 Divide both sides by 2 x = 35 / 2 x = 17.5 ft
*March 29, 2012*

**math**

1 h = 60 min 60 / 4 = 15 15 * 52 = 780 miles / hour OR 52 / 4 = 13 miles / min
*March 28, 2012*

**Math**

- 3 y + 5 > 23 - 3 y > 23 - 5 - 3 y > 18 FDivide both sides by - 3 --------------------------------------- Remark : Whenever you multiply or divide an inequality by a negative number, you must reverse the inequality sign. --------------------------------------- y <...
*March 28, 2012*

**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*