Monday

July 28, 2014

July 28, 2014

Total # Posts: 1,681

**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

**math**

1 h = 60 min 60 / 4 = 15 15 * 52 = 780 miles / hour OR 52 / 4 = 13 miles / min

**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 <...

**trig**

sin ( x ) * tan ( x ) = sin ( x ) * sin ( x ) / cos ( x ) = sin ^ 2 ( x ) / cos ( x )

**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 ) / s...

**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

**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 ...

**6th Grade Math**

All your answer is correct.

**trig**

x = 60 ° cos 60 ° = 1 / 2

**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

**Match Check**

1 /0.125 = 80

**ALGEBRA**

Also you can in google type: half-life equation and click : en.wikipedia

**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

**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

**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

**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.

**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

**maths**

x / 20 = 0.6 Multiply both sides by 20 20 x / 20 = 0.6 * 20 x = 12

**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 ...

**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

**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

**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 n...

**Math**

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

**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 ...

**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

**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"

**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 )

**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 / 1...

**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

**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

**precalc!!!!!**

Go on calc 101 dot com When page be open click option : long division

**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.

**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 =...

**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

**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 ?

**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 =...

**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

**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...

**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

**MAT/116**

- 1 + ( - 6) = - 1 - 6 = -7

**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

**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 f...

**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 6...

**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

**GEOMETRY**

start -> Programs -> Accessories -> Calculator -> View -> Sceintific 4 ° 35 ' 19 "

**GEOMETRY**

81 ° 47 ' 12 "

**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

**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

**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

**Math**

2 ( 4 y + 5 z ) - 10 z = 2 * 4 y + 2 * 5 z - 10 z = 8 y + 10 z - 10 z = 8 y

**math lit**

2 and half hours =120+30=150 min 2/150 = 1 exam/75 min

**Help! Math**

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

**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 ( 1...

**Math - HELP !**

31 students are in the drama club.

**Math - HELP !**

62 % = 62 / 100 62 * 50 / 100 = 3100 / 100 = 31 Proof: ( 31 / 50 ) * 100 % = 3100 % / 50 = 62 %

**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 %

**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

**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

**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 : Dividi...

**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

**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 % = ...

**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

**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

**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

**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 "

**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...

**math**

The center placed in the point (0,0) radius = sqrt ( 36 ) = 6

**math**

a n = - 2 ( n - 3 ) n = 19 a 19 = - 2 ( 19 - 3 ) a 19 = - 2 * 16 a 19 = - 32

**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

**math**

32 77 - 64 = 13 64 - 53 = 11 53 - 44 = 9 44 - 37 = 7 37 - 32 = 5

**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

**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

**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 ) si...

**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...

**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 )

**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

**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 -...

**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

**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 Formul...

**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

**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

**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

**Math**

( - 2 q ^ 2 + q + 3 ) - 5 ( q ^ 2 + 2 q - 1 ) = - 7 q ^ 2 - 9 q + 8

**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 ...

**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 (...

**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

**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.

**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

**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

**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 e...

**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 so...

**algebra**

w = the number of WHITE ribbions

**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 +...

**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

**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 (...

**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

**Math**

a x ^ 2 + b x + c = 0

**Math**

My answer is also numbers of girls g = 25

**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 /...

**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 ex...

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