Tuesday

October 25, 2016
Total # Posts: 2,239

**Intermediate algebra**

2 x ^ 2 + 3 = 0 Subtract 3 to both sides 2 x ^ 2 + 3 - 3 = 0 - 3 2 x ^ 2 = - 3 Divide both sides by 2 x ^ 2 = - 3 / 2 Take square root of both sides x = + OR - square root ( - 3 / 2 ) x = + OR - i * square root ( - 3 / 2 )

*June 1, 2014*

**Algebra 1--Please, check my answer!**

Correct

*May 31, 2014*

**Maths**

A x = b - c x Add c x to both sides A x + c x = b - c x + c x A x + c x = b x ( A + c ) = b Divide both sides by ( A + c ) x = b / ( A + c )

*May 31, 2014*

**Algebra 1--Please, check my answer!**

2 t / 4 t ^ 2 + 2 / t = 2 t / ( 2 * 2 * t * t ) + 2 / t = 1 / 2 t + 2 / t = 1 / 2 t + 2 * 2 / 2 t = 1 / 2 t + 4 / 2 t = ( 1 + 4 ) / 2 t = 5 / 2 t Correct Answer

*May 31, 2014*

**Algebra can someone guide me**

a ) f ( 13 ) = 13 - 7 = 6 a ) f ( - 6 ) = - 6 - 7 = - 13 c ) f ( p ) = p - 7

*May 30, 2014*

**Algebra can someone guide me**

Correction: f ( - 6 ) = - 6 - 7 = - 13

*May 30, 2014*

**Algebra can someone guide me**

f ( x) = x − 7 Just replace x with the given values. f ( 13 ) = 13 - 7 = 6 f ( 6 ) = 6 - 7 = 1 f ( p ) = 9 - 7

*May 30, 2014*

**Geometry**

V1 = Volume of one sphere: V1 = ( 1 / 6 ) * pi * d ^ 3 V = 30 * V1 V = 30 * ( 1 / 6 ) * pi * d ^ 3 V = ( 30 / 6 ) * pi * d ^ 3 V = 5 * pi * d ^ 3 3,392.92 = 5 * pi * d ^ 3 3,392.92 = 5 * 3.1416 * d ^ 3 3,392.92 = 15.708 * d ^ 3 Divide both sides by 15.708 3,392.92 / 15.708 = ...

*May 30, 2014*

**maths**

Remark: Length and width have path 2 meter wide for both sides. That's why we need to reduce their sizes by 2 m * 2 m Area of rectangle : A = a * b where a = L - 2 * 2 = 40 - 2 * 2 = 40 - 4 = 36 m b = W - 2 * 2 = 25 - 2 * 2 = 25 -4 = 21 m So : A = a * b = 36 * 21 = 756 m ^ 2

*May 30, 2014*

**maths**

A = ( 40 - 2 * 2 ) * ( 25 - 2 * 2 ) = ( ( 40 - 4 ) * ( 25 - 4 ) = 36 * 21 = 756 m ^ 2

*May 30, 2014*

**math**

The graph of a quadratic function is a parabola. If you want to see graph In google type: functions graphs online When you see list of results click on: rechneronline.de/function-graphs When page be open in blue recatacangle type: x ^ 2 + 1 Then click option Draw

*May 26, 2014*

**math**

For rule you must give more numbers in Input and Output Table

*May 26, 2014*

**maths**

( a + b ) ( a - b ) = a ^ 2 - b ^ 2 ( square root 7 + square root 5 ) ( square root 7 - square root 5 ) = ( square root 7 ) ^ 2 - ( square root 5 ) ^ 2 = 7 - 5 = 2

*May 26, 2014*

**maths**

520 - 5 t ^ 2 = 0 520 = 5 t ^ 2 Divide both sides by 5 104 = t ^ 2 t = sqrt ( 104 ) = 10. 198 sec

*May 26, 2014*

**math**

[ ( 2600 - 2000 ) / 2000 ] * 100 % = ( 600 / 2000 ) * 100 % = 0.3 * 100 % = 30 %

*May 26, 2014*

**Math**

0.8 / 1.6 = 0.5 0.4 / 0.8 = 0.5 0.2 / 0.4 = 0.5 Geometric progression with common ratio q =0 .5

*May 23, 2014*

**Math**

360 ° = 2 pi rad 360 ° / 23 = 2 pi / 23 rad

*May 22, 2014*

**I need to know how to work this Maths Problem**

PsyDAG Can you explain how 38 - 2 square root ( 62 ) IS NOT EQUAL 2 * ( 19 - square root ( 62 ) )

*May 22, 2014*

**I need to know how to work this Maths Problem**

What is your question? - 2 square root ( 62 )+ 38 = 38 - 2 square root ( 62 )= 2 * ( 19 - square root ( 62 ) ) So what?

*May 22, 2014*

**math**

x * y = x - y + 25 Add y to both sides x * y + y = x - y + 25 + y x * y + y = x + 25 y ( x + 1 ) = x + 25 Divide both sides by x + 1 y = ( x + 25 ) / ( x + 1 ) Long Division of Polynomials y = 1 + 24 / ( x + 1 ) You have infinite numbers of solutions, so you must give one more...

*May 22, 2014*

**math Question**

a 5 = 160 a 6 = a 5 * q = 160 * q a 7 = a 6 * q = a 5 * q * q = 160 * q ^ 2 = 40 160 q ^ 2 = 40 Divide both sides by 40 4 q ^ 2 = 1 Divide both sides by 4 q ^ 2 = 1 / 4 Take square root of both sides q = + OR - 1 / 2 All number in progression is positive so q = 1 / 2 a 6 = a 5...

*May 19, 2014*

**Algebra 2**

315 ° = 360 ° - 45 ° cos ( 360 ° - theta ) = cos ( theta ) cos ( 360 ° - 45 °) = cos ( 45 ° ) = square root ( 2 ) / 2

*May 19, 2014*

**math**

For x = - 3 y = ( 1 / 3 ) | - 3 | - 2 = ( 1 / 3 ) * 3 - 2 = 1 - 2 = - 1 for x = - 2 y = ( 1 / 3 ) | - 2 | - 2 = ( 1 / 3 ) * 2 - 2 = 2 / 3 - 2 = 2 / 3 - 6 / 3 = - 4 / 3 for x = - 1 y = ( 1 / 3 ) | - 1 | - 2 = ( 1 / 3 ) * 1 - 2 = 1 / 3 - 2 = 1 / 3 - 6 / 3 = - 5 / 3 for x = 0 y...

*May 18, 2014*

**math**

For x = - 3 y = - 2 ( x ) ^ 2 + 3 = - 2 * ( - 3 ) ^ 2 + 3 = - 2 * 9 + 3 = - 18 + 3 = - 15 for x = - 2 y = - 2 ( x ) ^ 2 + 3 = - 2 * ( - 2 ) ^ 2 + 3 = - 2 * 4 + 3 = - 8 + 3 = - 5 for x = - 1 y = - 2 ( x ) ^ 2 + 3 = - 2 * ( - 1 ) ^ 2 + 3 = - 2 * 1 + 3 = - 2 + 3 = - 1 for x = 0 y...

*May 18, 2014*

**algebra**

7 - | m - 1 | = 3 Subtract 3 to both sides 7 - | m - 1 | - 3 = 3 - 3 4 - | m - 1 | = 0 Add | m - 1 | to both sides 4 - | m - 1 | + | m - 1 | = 0 + | m - 1 | 4 = | m - 1 | | m - 1 | = 4 + OR - ( m - 1 ) = 4 1 solution : m - 1 = 4 Add 1 to both s ides m = - 1 + 1 = 4 + 1 m = 5 2...

*May 15, 2014*

**Math**

That is calculus question. a = length b = width P = Perimeter A = Area P = 2 a + 2 b = 2 ( a + b ) 24 = 2 ( a + b ) Divide both sides by 2 12 = a + b a + b = 12 Subtract a to both sides a + b - a = 12 - a b = 12 - a A = a * b = a * ( 12 - a ) A = 12 a - a ^ 2 The function has ...

*May 14, 2014*

**Math 2**

1 quart = 0.946353 liters The closest amount of milk = 1 liter. By the way in google type : units conversion. You will find many links.

*May 8, 2014*

**Algebra 1**

In google type : quadratic equation online When you see list of results click on : Free Online Quadratic Equation Solver: Solve by Quadratic... When page be open click option : Solve by Completing the Square Then in rectangle type : - x ^ 2 - 5 x = - 5 and click option : solve...

*May 7, 2014*

**algebra**

You're welcome.

*May 7, 2014*

**algebra**

log ( a ^ n ) = n * log ( a ) log ( 1 / a ) = - log ( a ) log ( a * b ) = log ( a ) + log ( b ) 64 = 8 * 8 log ( 64 ) = log ( 8 ) + log ( 8 ) log ( 64 ) = 2 * log ( 8 ) 8 ^ x = 1 / 64 x * log ( 8 ) = log ( 1 / 64 ) x * log ( 8 ) = - log ( 8 * 8 ) x * log ( 8 ) = - [ log ( 8...

*May 7, 2014*

**algebra**

2 x + y = 5 Subtract 2 x to both sides 2 x + y - 2 x = 5 - 2 x y = 5 - 2 x y = - 2 x + 5 y ^ 2 - 2 y = - 2 x + 5 ( - 2 x + 5 ) ^ 2 - 2 * ( - 2 x + 5 ) = - 3 x + 5 _______________________________________ Remark : ( a - b ) ^ 2 = a ^ 2 - 2 * a * b + b ^ 2 ...

*May 6, 2014*

**mat117**

In google type : quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver: Solve by Quadratic... When page be open in rectanlgle type: -5 x ^ 2 + 8x + 9 = 0 and click option : solve it! You will see solution step - by - tep

*May 3, 2014*

**math**

M * P = 300 J Divide both sides by 300 M * P / 300 = 300 J / 300 M * P / 300 = J J = M P / 300 = P M / 300 Answer D

*April 29, 2014*

**math**

M = 300 J / P Multiply both sides by P M * P = 300 J * P / P M * P = 300 J Divide both sides by J M * P / 300 = 300 J / 300 M * P / 300 = J J = M P / 300 = P M / 300 Answer D

*April 29, 2014*

**Math7**

For x = - 9 y = 4 x - 9 = 4 * ( - 9 ) - 9 = - 36 - 9 = - 45 For x = 3 y = 4 x - 9 = 4 * 3 - 9 = 12 - 9 = 3 For x = - 6 y = 4 x - 9 = 4 * ( - 6 ) - 9 = - 24 - 9 = - 33 For x = 5 y = 4 x - 9 = 4 * 5 - 9 = 20 - 9 = 11 If youe expression mean : y = - 4 x -9 then ( 5 , - 28 ) is ...

*April 25, 2014*

**Algebra 1 (Reiny)**

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

*April 25, 2014*

**Algebra**

If (10 / 3x) + (4/3) = (7 + x) / (2x) mean 10 / ( 3 x ) + 4 / 3 = ( 7 + x ) / ( 2 x ) then Multiply both sides by x 10 * x / ( 3 x ) + 4 * x / 3 = x * ( 7 + x ) / ( 2 x ) 10 / 3 + 4 x / 3 = ( 7 + x ) / 2 Multiply both sides by 6 10 * 6 / 3 + 6 * 4 x / 3 = 6 *( 7 + x ) / 2 10...

*April 17, 2014*

**Math**

3 L / 2 = 18 Multiply both sides BY 2 3 L = 36 Divide both sides by 3 L = 12 ft

*April 16, 2014*

**Math**

P = 2 W + 2 L = 2 ( W + L ) = 40 2 ( W + L ) = 40 Divide both sides by 2 W + L = 20 W = 2 + L / 2 W + L = 20 2 + L / 2 + L = 20 2 + L / 2 + 2 L / 2 = 20 2 + 3 L / 2 = 20 Subtract 2 to both sides 2 + 3 L / 2 - 2 = 20 - 2 3 L / 2 = 18 Multiply both sides by 3 3 L = 36 Divide ...

*April 16, 2014*

**algebra**

a ^ 2 - b ^ 2 = ( a + b ) ( a - b ) x ^ 2 + [ sqrt ( 15 ) ] ^ 2 = [ x + sqrt ( 15 ) ] * [ x - sqrt ( 15 ) ] sqrt mean "square root"

*April 8, 2014*

**Math**

x ^ a * x ^ b = x ^ ( a + b ) 2 ^ 2 * 2 ^ 8 = 2 ^ ( 2 + 8 ) = 2 ^ 10 ( 2.5 * 10 ^ 4 )( 4 * 10 ^ 3 ) = 2.5 * 4 * 10 ^ ( 4 + 3 ) = 10 * 10 ^ 7 = 10 ^ 1 * 10 ^ 7 = 10 ^ ( 1 + 7 ) = 10 ^ 8

*April 8, 2014*

**Algebra**

You must solve equation : 2 x ^ 2 + 6 x – 20 = 0 The solutions are : x = - 5 and 2 x-intercepts ( - 5 , 0 ) and ( 2 , 0 )

*April 8, 2014*

**Algebra**

3 x + 1 = 0 Subtract 1 from both sides 3 x + 1 - 1 = 0 - 1 3 x = - 1 Divide both sides by 3 3 x / 3 = - 1 / 3 x = - 1 / 3 x – 5 = 0 Add 5 from both sides x - 5 + 5 = 0 + 5 x = 5 The solutions are : - 1 / 3 and 5

*April 4, 2014*

**Algebra**

( x + 9 ) ^ 2 = 169 Take the square root of both sides x + 9 = 13 Subtract 9 from both sides x + 9 - 9 = 13 - 9 x = 4 The length of the original garden = 4 m

*April 4, 2014*

**algebra**

( 15 x ^ 2 + 10 x - 5 ) / 5 x = 5 ( 3 x ^ 2 + 2 x - 1 ) / 5 x = ( 3 x ^ 2 + 2 x - 1 ) / x = 3 x + 2 - 1 / x

*April 4, 2014*

**math**

h ( t ) = a t ^ 2 + b t + c h ( t ) = – 16 t ^ 2 + 20 t + 2 a = - 16 b = 20 c = 2 t - coordinate of minimum point t = - b / 2 a t = - 20 / [ 2 * - 16 ) ] t = - 20 / - 32 = 20 / 32 = 4 * 5 / ( 4 * 8 ) = 5 / 8 = 0.625 h - coordinate of minimum point h = - ( b ^ 2 - 4 a c...

*March 28, 2014*

**Algebra**

You're welcome.

*March 21, 2014*

**Algebra**

If you think about Prentice Hall Algebra 1 9 - 6 then : The area of the photo will be half the area of the entire ad. Area of the photo = 7 * 5 = 35 in ^ 2 that is one half the area of the paper. So area of the paper = 70 in ^ 2 Now you must solve equation : ( 7 + x ) ( 5 + x...

*March 21, 2014*

**math**

sqrt ( 3 x * y ^ 3 )* sqrt ( 2 x ^ 2 * y ) / sqrt ( 6 x ^ 3 * y ^ 4 ) = sqrt ( 3 x * y ^ 3 * 2 x ^ 2 * y ) / sqrt ( 6 x ^ 3 * y ^ 4 ) = sqrt ( 6 x ^ 3 y ^ 4 ) / sqrt ( 6 x ^ 3 y ^ 4 ) = 1

*March 16, 2014*

**MATH**

In google type : quadratic equation online When you see list of results click on : Free Online Quadratic Equation Solver: Solve by Quadratic When page be open in rectangle type : 3x^2+9x+3=0 and click option : solve it You will see solution step by step

*March 16, 2014*

**math (cant figure it out)**

Explanation r = d / 2 d = 2 r For that reason A = d * pi * ( d / 2 + h ) = 2 * r * pi * ( r + h )

*March 15, 2014*

**Algebra**

x = the cost of hot dog y = the cost of hamburger 3 x + 4 y = 13.5 4 x + 3 y = 12.75 3 x + 4 y = 13.5 - 4 x + 3 y = 12.75 ______________________ - x + y = 0.75 Add x to both sides - x + y + x = 0.75 + x y = 0.75 + x 4 x + 3 y = 12.75 4 x + 3 * ( 0.75 + x ) = 12.75 4 x + 2.25...

*March 14, 2014*

**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 option Solve by Factoring (includes Factoring by Grouping) then in rectangle type 2x^2+5x+3=0 and click ...

*March 9, 2014*

**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+5x+3=0 and click option: solve it!

*March 9, 2014*

**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 option Solve by Factoring (includes Factoring by Grouping) then in rectangle type 2x^2 + 13x + 20=0 and ...

*March 9, 2014*

**Math**

4 < = 2 c + 7 < = 21 Subbtract 7 4 - 7 < = 2 c + 7 - 7 < = 21 - 7 - 3 < = 2 c < = 14 Divide by 2 - 3 / 2 < = 2 c / 2 < = 14 / 2 - 3 / 2 < = c < = 7

*March 9, 2014*

**Math**

4 < = 2 c + 7 < = 21 Subbtract 7 4 - 7 < = 2 c + 7 - 7 < = 21 - 7 - 3 < = 2 c < = 14 Divide by 2 - 3 / 2 < = 2 c / 2 < = 14 / 2 - 3 / 2 < = c < = 7

*March 9, 2014*

**math**

If f(x) -5x^2+7x+3 mean: f ( x ) = - 5 x ^ 2 + 7 x + 3 Then : f ( x ) = a x ^ 2 + b x + c f ( x ) = - 5 x ^ 2 + 7 x + 3 a = - 5 , b = 7 , c = 3 The x coordinate of the vertex ; x = - b / 2 a x = - 7 / ( 2 * ( - 5 ) ) x = - 7 / - 10 = 7 / 10

*March 8, 2014*

**Math**

Difference between second numbers is 11. 24 - 13 = 11 and 57 - 46 = 11 So: 111 ¨ 13 , 112 ¨ 24 , 113 ¨ 35 , 114 ¨ 46 , 115 ¨ 57 , 116 ¨ 68 , 117 ¨ 79

*March 7, 2014*

**algebra**

h = -1 6 t ^ 2 + vt v = 120 h = - 16 t ^ 2 + 120 t h = - 4 * 4 t ^ 2 + 4 * 30 t h = 4 t ( - 4 t + 30 ) 0 = 4 t ( - 4 t + 30 ) obviously solution : t = 0 ( initial point ) and - 4 t + 30 = 0 - 4 t = - 30 - 4 t / 4 = - 30 / - 4 t = 30 / 4 = 2 * 15 / ( 2 * 2 ) = 15 / 2 = 7.5 s

*March 4, 2014*

**Intermediate Algebra**

Correct The other sides : x and x + 1 where x + 1 is the hypotenuse So Pythagorean theorem: ( x + 1 ) ^ 2 = x ^ 2 + 5 ^ 2 x ^ 2 + 2 x + 1 = x ^ 2 + 25 Both x ^ 2 get cancelled 2 x + 1 = 25 2 x = 25 - 1 = 25 - 1 = 24 x = 24 / 2 = 12 m hypotenuse x + 1 = 12 + 1 = 13 m

*March 4, 2014*

**math**

1 lb = 0.45359237 kg 20 lb = 20 * 0.45359237 = 9.0718474 kg 20 lb = 9.1 kg rounded to the nearest tenth Remak : lb = pound

*February 23, 2014*

**Math! HELP!**

[ ( 3 / 2 ) b ^ 4 ] ^ 3 = [ ( 3 ^ 3 ) / ( 2 ^ 3 ) ] * ( b ^ 4 ) ^ 3 = ( 27 / 8 ) * b ^ ( 4 * 3 ) = ( 27 / 8 ) * b ^ 12 = 27 b ^ 12 / 8 ( 3 / 5 y ^ 4 )^ ( - 2 ) = [ ( 3 ^ ( - 2 ) ] / [ ( 5 ^ ( - 2 ) ] * [ y ^ 4 ^ ( - 2 ) ] = ( 1 / 3 ^ 2 ) / ( 1 / 5 ^ 2 ) * y ^ [ 4 * ( - 2...

*February 21, 2014*

**Algebra 1**

You're boring with your questions.

*February 21, 2014*

**Algebra 1 Answer Check**

1. If 49^3/2 mean 49 ( 3 / 2 ) then: 49 ( 3 / 2 ) = [ ( 49 ) ^ 3 ] ^ ( 1 / 2 ) = [ ( 49 ) ^ ( 1 / 2) ] ^ 3 = sqrt ( 49 ) ^ 3 = 7 ^ 3 = 343 Correct 2. What is 5^ãx^25y^125 ? 3. 5 x - 2 x + 8 x ^ 2 - 7 = 8 x ^ 2 + 3 x - 7 In a polynomial, the coefficient of the term...

*February 21, 2014*

**Algebra 1**

SORRY: A = 2 w ^ 2 + 4 w OR A = 2 ( w ^ 2 + 2 w ) OR A = 2 w ( w + 2 )

*February 21, 2014*

**Algebra 1**

A = 2 w ^ 2 + 4 w OR A = 2 ( w ^ 2 + 4 w ) OR A = 2 w ( w + 4 ) All three is same answer.

*February 21, 2014*

**Algebra 1**

A = W * L = W * ( 2 W + 4 ) = W * 2 W + W * 4 = 2 W ^ 2 + 4 W = 2 ( W ^ 2 + 4 W )

*February 21, 2014*

**Algebra 1**

Area of rectangle = width * length

*February 21, 2014*

**Algebra 1**

Both

*February 21, 2014*

**Algebra 1**

L = 2 W + 4 A = W * L A = W * ( 2 W + 4 ) A = 2 W ^ 2 + 4 W A = 2 ( W ^ 2 + 2 W )

*February 21, 2014*

**Algebra 1**

L = 2 W + 4 A = W * L

*February 21, 2014*

**Math**

On yor computer you have calculator on 32 digits: start -> Programs -> Accesories -> Calculator When you open Calculator clik : View then Sceintific then type: 3.0801 x ^ y 9 then = P.S. 3.0801 ^ 9 = 3.0801 * 3.0801 * 3.0801 * 3.0801 * 3.0801 * 3.0801 * 3.0801 * 3....

*February 17, 2014*

**Calculus II**

y = a x ^ 2 + b * x + c You must solve system of equations : a * x1 ^ 2 + b * x1 + c = y1 a * x2 ^ 2 + b * x2 + c = y2 a * x3 ^ 2 + b * x3 + c = y3 then put values of a , b and c in equation : y = a x ^ 2 + b * x + c

*February 17, 2014*

**math**

Copy your question in google. When you see list of resulta go on : w w w . a l g e b r a . c o m › Sequences-and-series

*February 13, 2014*

**Math**

1 yd = 36 in 15 yd = 15 * 36 = 540 in 540 / 10.5 = 51.429 51 full bookmarks

*February 13, 2014*

**math..**

8 and 1 / 2 = 18 + 1 / 2 = 8 + 2 / 4 = 32 / 4 + 2 / 4 = 34 / 4 1 and 3 / 4 = 1 + 3 / 4 = 4 / 4 + 3 / 4 = 7 / 4 8 and 1 / 2 - 1 and 3 / 4 = 34 / 4 - 7 / 4 = 27 / 4 = ( 24 + 3 ) / 4 = 24 / 4 + 3 / 4 = 6 + 3 / 4 = 6 3 / 4

*February 10, 2014*

**math**

sqrt mean : square root 4 * sqrt ( 2 ) = 4 * square root of 2 ANSWER 3

*February 9, 2014*

**math**

4 * sqrt ( 2 ) = sqrt ( 16 ) * sqrt ( 2 ) = sqrt ( 32 ) = sqrt ( 2 ^ 5 ) = ( 2 ^ 5 ) ^ ( 1 / 2 ) = 2 ^ ( 5 / 2 ) Answer 3

*February 9, 2014*

**algebra & trigonometry**

a = first number b = second number c = third number b = 2 c + 1 a + c = b - 3 a + c = ( 2 c + 1 ) - 3 a + c = 2 c - 2 a = 2 c - 2 - c a = c - 2 a + b + c = 7 c - 2 + 2 c + 1 + c = 7 4 c - 1 = 7 4 c = 7 + 1 4 c = 8 Divide both sides by 4 c = 8 / 4 = 2 a = c - 2 = 2 - 2 = 0 b = ...

*February 9, 2014*

**Math**

( 3 / 5 ) * 15 = 3 * 15 / 5 = 45 / 5 = 9

*February 5, 2014*

**Math**

0. 50 x + 0.20 y = 3.60 Multiply both sides by 2 x + 0.4 y = 7.2 x + 0.4 y = 7.2 - x + y = 9 _____________ 0 - 0.6 y = - 1.8 - 0.6 y = - 1.8 Divide both sides by - 0.6 y = - 1.8 / - 0.6 = 3 y = 3 x + y = 9 x = 9 - y = 9 - 3 = 6 x = 6 , y = 3

*February 5, 2014*

**Math**

S = Number of students A = Number of adults 12 $ * S + 18 $ * A = 162 $ OR 12 S + 18 A = 162 S + A = 12 A = 12 - S 12 S + 18 A = 162 12 S + 18 ( 12 - S ) = 162 12 S + 18 * 12 - 18 * S = 162 12 S + 216 - 18 S = 162 12 S - 18 S = 162 - 216 - 6 S = - 54 Divide both sides by - 6 S...

*February 5, 2014*

**math**

You must give more informations. 4 digits number can be write in form : n = 1000 a + 100 b + 10 c + d In this case : a = 2 d b = c So : n = 1000 ( 2 d ) + 100 c + 10 c + d n = 2000 d + 100 c + 10 c + d n = 2001 d + 110 c For example : d = 2 c = 1 n = 2001 d + 110 c = 2001 * 2...

*February 4, 2014*

**math**

3 / 4 = 0.75 2 / 3 = 0.66666 7 / 8 = 0.875 2 / 3 , 3 / 4 , 7 / 8

*February 4, 2014*

**math(check answers)**

All the answers correct

*February 4, 2014*

**Math**

P = 2 W + 2 L = 2 ( W + L ) = 442 Divide both sides by 2 W + L = 221

*February 2, 2014*

**Math**

L / W = 12 / 5 Multiply both sides by 5 5 L / W = 12 Multiply both sides by W 5 L = 12 W Divide both sides by 5 L = ( 12 / 5 ) W L = 2.4 W P = 2 W + 2 L = 2 ( W + L ) = 442 Divide both sides by 2 W * L = 221 W + 2.4 W = 221 3.4 W = 221 Divide both sides by 3.4 W = 221 / 3.4 W...

*February 2, 2014*

**Math**

Write the fractions in decimal form, then compare them. 2 / 8 = 2 * 1 / ( 2 * 4 ) = 1 / 4 = 0.25 1 / 3 = 0.3333 2 / 6 = 2 * 1 / ( 2 * 3 ) = 1 / 3 = 0.333 2 / 3 = 0.666 3 / 4 = 0.75 1 / 8 = 0.125 1 / 4 = 0.25 1 / 10 = 0.1 1 / 6 = 0.166

*February 1, 2014*

**math**

1. C and D 2. A and D 3. B and C 4 D becouse 0.03 = 3% 1 / 5 = 20 %

*February 1, 2014*

**Math**

30 meters in 10 seconds = 30 / 10 = 3 m / s 2 min = 2 * 60 = 120 s 3 * 120 = 360 m OR 2 min = 2 * 60 = 120 s 30 * ( 120 / 10 ) = 30 * 12 = 360 m

*January 31, 2014*

**Algebra**

No difference. 1 / 3 ^ 2 = 1 / 9 ( 1 / 3 ) ^ 2 = ( 1 / 3 ) * ( 1 / 3 ) = 1 / 9

*January 28, 2014*

**math**

r /15 > -3 Multiply both sides by 15 r > - 45

*January 28, 2014*

**math**

c + 6 <= 20 Subtract 6 to both sides c < - 26 d /13 > = 3 Multiply both sides by 13 d > = - 39 - 3 p > 48 Divide both sides by - 3 ________________________________________ Remark : The inequality sign reversed when you multiply or divide by a negative number. ...

*January 28, 2014*

**math**

c + 6 < ¨C 20 Subtract 6 to both sides c < - 26 d /13 ¡Ý ¨C 3 Multiply both sides by 13 d ¡Ý - 39 ¨C 3 p > ¨C 48 Divide both sides by - 3 ________________________________________ Remark : The inequality sign reversed when you ...

*January 28, 2014*

**Consumer Math**

( 5 / 31 ) / ( 15 / 23 ) = 5 * 23 / ( 15 * 31 ) = 5 * 23 / ( 5 * 3 * 31 ) = 23 / ( 3 * 31 ) = 23 / 93 Answer B

*January 28, 2014*

**Algebra**

x + 3 y = - 4 Multiply both sides by 2 2 x + 6 y = - 8 2 x + 6 y = - 8 - 2 x + 2 y = - 8 _____________________ - 4 y = 0 y = 0 x + 3 y = - 4 x + 3 * 0 = - 4 x + 0 = - 4 x = - 4 Te solutions are : x = - 4 , y = 0

*January 26, 2014*

**math**

a ^ m * a ^ n = a ^ ( m + n ) 3 ^ 4 * 3 ^ ( - 2 ) = 3 ^ [ 4 + ( - 2 ) ] = 3 ^ ( 4 - 2 ) = 3 ^ 2 = 9 OR 3 ^ 4 = 81 3 ^ ( - 2 ) = 1 / 3 ^ 2 = 1 / 9 3 ^ 4 * 3 ^ ( - 2 ) = 81 * 1 / 9 = 81 / 9 = 9

*January 26, 2014*

**Calculus**

[ t sqrt ( t ) + t sqrt ( t ) ] = 2 t sqrt ( t ) 2 t sqrt ( t ) / t ^ 2 = 2 * sqrt ( t ) / [ sqrt ( t ) * sqrt ( t ) * t ] = 2 / sqrt ( t ) = 2 * t ^ ( - 1 / 2 ) int [ 2 * t ^ ( - 1 / 2 ) ] dt = 2 * t ^ ( - 1 / 2 + 1 ) / ( - 1 / 2 + 1 )= 2 * t ^ ( 1 / 2 ) / ( 1 / 2 ) = 2 * 2...

*January 24, 2014*