Friday

August 26, 2016
Total # Posts: 2,178

**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*

**Maths**

In google type : History of numbers
*June 27, 2013*

**Maths**

In google type : History of pie
*June 27, 2013*

**Math**

x = first number y = second number y = x + 1 x * y = 272 x * ( x + 1 ) = 272 x ^ 2 + x = 272 x ^ 2 + x - 272 = 0 Solutions : x = - 17 and x = 16 For x = - 17 y = x + 1 = - 17 + 1 = - 16 x * y = - 17 * ( - 16 ) = 272 For x = 16 y = x + 1 = 16 + 1 = 17 x * y = 16 * 17 = 272 So ...
*June 27, 2013*

**trig**

cos A = 1 / 3 sin A = + OR - sqrt ( 1 - cos A ^ 2 ) sin A = + OR - sqrt ( 1 - ( 1 / 3 ) ^ 2 ) sin A = + OR - sqrt ( 1 - 1 / 9 ) sin A = + OR - sqrt ( 9 / 9 - 1 / 9 ) sin A = + OR - sqrt ( 8 / 9 ) sin A = + OR - sqrt ( 4 * 2 / 9 ) sin A = + OR - sqrt ( 4 ) * sqrt ( 2 ) / sqrt...
*June 16, 2013*

**Algebra**

8 * 10 ^ -6
*June 16, 2013*

**Algebra**

6 x ^ 7 - 3 x ^ 3 + 2 x ^ 7 + 8 x ^ 3 = 6 x ^ 7 + 2 x ^ 7 - 3 x ^ 3 + 8 x ^ 3 = 8 x ^ 7 + 5 x ^ 3 = x ^ 3 ( 8 x ^ 4 + 5 )
*June 16, 2013*

**math**

7 / 9 , 7 / 5 , 7 / 3
*June 11, 2013*

**Intermediate algebra, concepts and graphs**

st = Number of students pr = Number of parents pr = 80 - st 2.5 * st + 3.5 * pr = 234 2.5 * st + 3.5 * ( 80 - st ) = 234 2.5 st + 3.5 * 80 - 3.5 St = 234 2.5 st + 280 - 3.5 st = 234 280 - st = 234 Add st to both sides 280 - st + st = 234 + st 280 = 234 + st Subtract 234 to ...
*June 10, 2013*

**maths**

D = Number of Ducks C = Number of Cows D + C = 35 C = 35 - D Duck have 2 legs. Cow have 4 legs All the cows have 74 more legs than all the ducks. This mean : 4 * C = 2 D + 74 4 * ( 35 - D ) = 2 D + 74 4 * 35 - 4 D = 2 D + 74 140 - 4 D = 2 D + 74 Subtract 74 to both sides 140...
*June 10, 2013*

**math**

x / 2 + x / 3 = 5 ( x * 3 + x * 2 ) / ( 2 * 3 ) = 5 5 x / 6 = 5 Multiply both sides by 6 5 x = 5 * 6 5 x = 30 Divide both sides by 6 x = 30 / 5 = 5
*June 9, 2013*

**math**

x / 2 + x / 3 = 5 ( x * 3 + x * 2 ) / ( 2 * 3 ) = 5 5 x / 6 = 5 Multiply both sides by 6 5 x = 5 * 6 5 x = 30 Divide both sides by 5 x = 30 / 5 = 5
*June 9, 2013*

**Math**

7 / 3 a + 2 / 5 = ( 7 * 5 + 2 * 3 a ) / ( 5 * 3 a ) = ( 35 + 6 a ) / 15 a = ( 6 a + 35 ) / 15 a
*June 9, 2013*

**Introduction to Algebra MAT 221**

x ^ 4 = x ^ 3 * x x ^ 4 - x ^ 3 = x ^ 3 * x - x ^ 3 = x ^ 3 ( x - 1 )
*June 6, 2013*

**algerbra**

( 20 + 24 ) / 2 = 44 / 2 = 22
*June 6, 2013*

**Algebra**

( 80 + 90 + 78 + 100 + 76 + 74 + 82 + x ) / 8 = 82 Multiply both sides by 8 80 + 90 + 78 + 100 + 76 + 74 + 82 + x = 82 * 8 580 + x = 656 Subtract 580 to both sides 580 + x - 580 = 656 - 580 x = 76
*June 6, 2013*

**Math**

- 7 ( 3 + 5 x ) = 399 - 7 * 3 - 7 * 5 x = 399 - 21 - 35 x = 399 Add 21 to both sides - 21 - 35 x + 21 = 399 + 21 - 35 x = 420 Divide both sides by - 35 - 35 x / - 35 = 420 / - 35 x = - 12 Proof : - 7 ( 3 + 5 x ) = 399 - 7 [ 3 + 5 * ( - 12 ) ] = 399 - 7 ( 3 - 60 ) = 399 - 7...
*June 4, 2013*

**Math**

4 x - 9 = - 5 x - 99 Add 5 x to both sides 4 x - 9 + 5 x = - 5 x - 99 + 5 x
*June 3, 2013*

**Math**

4 x - 9 = - 5 x - 99 Add 5 x to both sides 4 x - 9 + 5 x = -5 x - 99 + 5 9 x - 9 = - 99 Add 9 to both sides 9 x - 9 + 9 = - 99 + 9 9 x = - 90 Divide both sides by 9 9 x / 9 = - 90 / 9 x = - 10 Proof: 4 x - 9 = - 5 x - 99 4 * ( - 10 ) - 9 = - 5 * ( - 10 ) - 99 - 40 - 9 = 50 - ...
*June 3, 2013*

**Math**

5 - x - x = - 17 5 - 2 x = - 17 Subtract 5 to both sides 5 - 2 x - 5 = - 17 - 5 - 2 x = - 22 Divide both sides by - 2 - 2 x / - 2 = - 22 / - 2 x = 11 Proof : 5 - x - x = 5 - 11 - 11 = 5 - 22 = - 17
*June 3, 2013*

**math**

n = 1 a1 = 3 = 1 * 3 = 1 * ( 2 * 1 + 1 ) = 2 ^ 0 ( 2 n + 1 ) = 2 ^ ( n - 1 ) ( 2 n + 1 ) n = 2 a2 = 10 = 2 * 5 = 2 * ( 2 * 2 + 1 ) = 2 ^ 1 ( 2 n + 1 ) = 2 ^ ( n - 1 ) ( 2 n + 1 ) n = 3 a3 = 28 = 4 * 7 = 4 * ( 2 * 3 + 1 ) = 2 ^ 2 ( 2 n + 1 ) = 2 ^ ( n - 1 ) ( 2 n + 1 ) n = 4 a4...
*June 3, 2013*

**algebra**

( 3 x ^ 2 - 2 x - 1 ) - ( 5 x ^ 2 + 4 + 2 ) = 3 x ^ 2 - 2 x - 1 - 5 x ^ 2 - 4 x - 2 = - 2 x ^ 2 - 6 x - 3
*June 3, 2013*

**math**

x ^ 2 - 10 x + ( 10 / 2 ) ^ 2 = 9 + ( 10 / 2 ) ^ 2 x ^ 2 - 10 x + 5 ^ 2 = 9 + 5 ^ 2 x ^ 2 - 10 x + 25 = 9 + 25 ( x - 5 ) ^ 2 = 34
*June 3, 2013*

**math**

abs ( 2 - x ) = 3 2 - x = 3 x = 2 - 3 = - 1 - ( 2 - x ) = 3 - 2 + x = 3 x = 3 + 2 = 5
*June 3, 2013*

**math**

Coterminal angles are angles, which share a common terminal side. 820 ° = 2 * 360 ° + 100 ° = 720 ° + 100 ° Coterminal angle = 100 °
*May 29, 2013*

**Algebra**

- 9 - 7 x = - 58 Add 9 to both sides - 9 - 7 x + 9 = - 58 + 9 - 7 x = - 49 Divide both sides by - 7 - 7 x / - 7 = - 49 / - 7 x = 7
*May 29, 2013*

**Math**

1 kg = 1000 g 3 kg = 3000 g 3000 g - 750 g = 2250 g = 2 kg 250 g
*May 29, 2013*

**algebra**

16 = x + 5 16 - 5 = x + 5 - 5 11 = x x = 11
*May 29, 2013*

**maths**

Angles : A , B , C and D ( A + B + C ) / 3 = 64 Multiply both sides by 3 A + B + C = 3 * 64 = 192 ° A / B = 2 / 3 Multiply both sides by 3 3 A / B = 2 Multiply both sides by B 3 A = 2 B Divide both sides by 3 A = 2 B / 3 B / C = 3 / 7 Multiply both sides by 7 7 B / C = 3 ...
*May 28, 2013*

**Math**

The general equation for the function is: f( x ) = a ( x - x1 ) ( x - x2 )( x - x3 ) where x1, x2 and x3 are the roots and a is the coefficient of x ^ 3 There is a theorem in algebra called the Imaginary Zeros Theorem. It says that for a polynomial that is restricted to real ...
*May 24, 2013*

**Math**

300 % = 300 / 100 = 3 3 * 25 = 75 cents
*May 24, 2013*

**college algebra**

35,000 ( 1.10 ) ^ - 12 = 35,000 / ( 1.10 ) ^ 12 = 35,000 / 3.138428376721 = 11,152.07862
*May 23, 2013*

**math**

In google type : square root of 0.31428 from divison method When you see list of results click on : meritnation com /ask.../what.../squares...square-roots/2168377
*May 20, 2013*

**Math**

3 ^ x = 7 x * lgt ( 3 ) = lgt ( 7 ) x = lgt ( 7 ) / lgt ( 3 ) x = 0.845098 / 0.477121 x = 1.771245 lgt is the logarithm with base 10
*May 20, 2013*

**Algebra**

A = Area = 60 in ^ 2 b = base = 10 in h = height A = b h / 2 60 = 10 * h / 2 Multiply both sides by 2 120 = 10 * h Divide both sides by 10 12 = h h = 12 in h = sqrt ( x ) Square both sides h ^ 2 = x x = h ^ 2 = 12 ^ 2 = 144 in ^ 2
*May 20, 2013*

**Math**

50 % = 50 / 100 = 0.5 A team won 0.5 * 60 = 30 games x = the number of games the team must win 60 % = 60 / 100 = 0.6 Proportion : ( 30 + x ) / ( 60 + x ) = 0.6 Multiply both sides by 60 + x 30 + x = ( 60 + x ) * 0.6 30 + x = 36 + 0.6 x Subtract 30 to both sides 30 + x - 30 = ...
*May 15, 2013*

**Math**

100 / 60 = 2 * 5 * 10 / ( 2 * 3 * 10 ) = 5 / 3 = 1.6666666 1.6666 * 100 % = 166.66666 % 166.66666 % - 100 % = 66.66666 % Correct answer.
*May 13, 2013*