Thursday
November 27, 2014

Posts by Bosnian


Total # Posts: 1,763

Trigonometry
The rule of Pythagoras: c ^ 2 = a ^ 12 + b ^ 2 In this case : c = 34 cm b = a + 14 c = a ^ 2 + ( a + 14 ) ^ 2 34 ^ 2 = a ^ 2 + ( a + 14 ) ^ 2 1156 = a ^ 2 + a ^ 2 + 2 * a * 14 + 14 ^ 2 1156 = 2 a ^ 2 + 28 a + 196 Subtract 196 to both sides 1156 - 196 = 2 a ^ 2 + 28 a + 196 - ...
September 8, 2012

Precalculus
an = n ^ 2 + 1 n = 1 a1 = 1 ^ 2 + 1 = 1 + 1 = 2 n = 2 a2 = 2 ^ 2 + 1 = 4 + 1 = 5 n = 3 a3 = 3 ^ 2 + 1 = 9 + 1 = 10 n = 4 a4 = 4 ^ 2 + 1 = 16 + 1 = 17
September 8, 2012

Cal-Help Please
When x = 9 9 x − x ^ 2 = 9 * 9 - 9 ^ 2 = 81 - 81 = 0 and 3 - sqt( x ) / ( 9 x − x ^ 2 ) = 3 - sqt( 9 ) / ( 9 x − x ^ 2 ) = 3 - 3 / 0 = 3 - ( + OR - infinity ) So: limit 3 − square root( x ) /(9 x − x ^ 2 ) as x ->9 = + OR - infinity
September 8, 2012

geometry
Two Angles are complementary if they add up to 90 ° (a Right Angle). Or : A + B = 90 ° In this case : A = 16 z - 9 ° B = 4 z + 3 ° A + B = 90 ° 16 z - 9 ° + 4 z + 3 ° = 90 ° 20 z - 6 ° = 90 ° Add 6 ° to both sides 20 z - 6 ° + 6...
September 8, 2012

Math
3 x + 2 y = 3 subtract 3 x to both sides 3 x - 3 x + 2 y = 3 - 3 x 2 y = 3 - 3 x Divide both sides by 2 y = 3 / 2 - 3 x / 2 2 x + 10 y = - 5 Subtract 2 x to both sides 2 x - 2 x + 10 y = - 5 - 2 x 10 y = - 5 - 2 x Divide both sides by 10 y = - 5 / 10 - 2 x / 10 y = y 3 / 2 - 3...
September 8, 2012

Algebra....HELP!!
7 a + 6 b = 3 + -7 a + b = 25 ________________ 7 a + ( - 7 a ) + 6 b + b = 3 + 25 7 b = 28 Divide both sides by 7 7 b / 7 = 28 / 7 b = 4 7 a + 6 b = 3 7 a + 6 * 4 = 3 7 a + 24 = 3 Subtract 24 to both sides 7 a + 24 - 24 = 3 - 24 7 a = - 21 Divide both sides by 7 7 a / 7 = - ...
September 7, 2012

Math
If your expresion mean : ( - 4 ) * ( - x ) ^ 3 * x * ( - 1 / 8 ) then : ( - 4 ) * ( - x ) ^ 3 * x * ( - 1 / 8 ) = - 4 * ( - 1 / 8 ) * ( - x ^ 4 ) = ( 1 / 2 ) * ( - x ^ 4 ) = - x ^ 4 / 2
September 6, 2012

math
If your expression mean : [ ( 2 ^ 5 - 5 ) / 9 ] * 11 then : 2 ^ 5 = 2 * 2 * 2 * 2 * 2 = 32 2 ^ 5 - 5 = 32 - 5 = 27 ( 2 ^ 5 - 5 ) / 9 = 27 / 9 = 3 [ ( 2 ^ 5 - 5 ) / 9 ] * 11 = 3 * 11 = 33
September 5, 2012

calculus
5 = 1 + 4 6 = 2 + 4 7 = 3 + 4 ... 14 = 10 + 4 5 ^ 2 + 6 ^ 2 + 7 ^ 2 + ... + 14 ^ 2 = ( 1 + 4 ) ^ 2 + ( 2 + 4 ) ^ 2 + ( 3 + 4 ) ^ 2 + ... + ( 10 + 4 )^ 2 = E ( k + 4 ) ^ 2 from n = 1 to n = 10 ________________________________________ ( k + 4 ) ^ 2 = k ^ + 2 * k * 4 + 4 ^ 2 = k...
September 5, 2012

Math
x ^ 2 + y ^ 2 + 6 x - 46 = 0 x ^ 2 + y ^ 2 + 6 x = 46 ( x ^ 2 + 6 x + 9 ) + y ^ 2 = 46 + 9 ( x + 3 ) ^ 2 + y ^ 2 = 55 The circle equation is: (x - a ) ^ 2 + ( y - b ) ^ 2 = r ^ 2 where a and b are the x and y coordinates of the center of the circle. In this case : a = - 3 ...
September 4, 2012

math
60
September 2, 2012

calculus
Where is your graph?
September 1, 2012

math
If log 7 mean logarithm to base b = 7 then : log 7 ( x ) = log 7 ( 4 ) + log 7 ( 3 ) log ( a ) + log ( b ) = log ( a * b ) log 7 ( 4 ) + log 7 ( 3 ) = log 7 ( 4 * 3 ) = log 7 ( 12 ) log 7 ( x ) = log 7 ( 12 ) x = 12
September 1, 2012

Math
A = sqrt [ s * ( s - a ) * ( s - b ) * ( s - c ) ]
August 31, 2012

Math
The semiperimeter of a triangle is half its perimeter. The formula for the semiperimeter of a triangle with side lengths a, b, and c is: s = ( a + b + c ) / 2 The area of a triangle can also be calculated from its semiperimeter using Heron's formula: A = [ sqrt s * ( s - a...
August 31, 2012

Pre-algebra
2 + 0.35 * 12 = 2 + 4.2 = 6.2
August 31, 2012

MATH
16 - 30 / ( 10 + 5 ) = 16 - 30 / 15 = 16 - 2 = 14
August 27, 2012

geometry
180 ° - x = 3 * ( 90 ° - x ) - 60 ° 180 ° - x = 270 ° - 3 x - 60 ° 180 ° - x = 210 ° - 3 x - x + 3 x = 210 ° - 180 ° 2 x = 30 ° Divide both sides by 2 x = 15 °
August 25, 2012

math
16 ^ 2 = 256 25 / 5 = 5 If 6(3)4 mean 6 * 3 * 4 then . 16^2-25/5+6(3)4= 256 - 5 + 72 = 323
August 25, 2012

math
Go on: wolframalpha dot com When page be open in rectangle type: derivative ln(cos(0.5)+(sin(x^2+3))^1/3) and click option = After few seconds when you see result click option: Show steps On wolfram alpha dot com you can practice any kind of calculus. That is good just for ...
August 25, 2012

Algebra
When p = 0 1 / p -> Infinity One solution also p < 0 becouse when p < 0 then 1 / 6 p are negative and 1 / 6 p + 14 < 20 So the exact solutions are : p < 0 and p > 1 / 36
August 24, 2012

Algebra
1 / ( 6 p ) + 14 < 20 Subtract 14 to both sides 1 / ( 6 p ) + 14 - 14 < 20 - 14 1 / ( 6 p ) < 6 Multiply both sides by 6p 6 p * 1 / ( 6 p ) < 6 p * 6 1 < 36 p Divide both sides by 36 1 /36 < 36 p / 36 1 / 36 < p that is equivalent of p > 1 / 36
August 24, 2012

math
P = 2 a + 2 b In your case : a = x , b = 2 x + 3 P = 2 a + 2 b = 72 P = 2 x + 2 * ( 2 x + 3 ) = 72 2 x + 4 x + 6 = 72 6x + 6 = 72 Subtract 6 to both sides 6 x + 6 - 6 = 72 - 6 6 x = 66 Divide both sides by 6 x =11 x = a = 11 cm b = 2 x + 3 b = 2 * 11 + 3 = 22 + 3 = 25 cm P = 2...
August 24, 2012

Algebra
1 p = p 1 p + 14 < 20 p + 14 < 20 Subtracrt 14 to both sides p + 14 - 14 < 20 - 14 p < 6
August 24, 2012

math
n = your number a = ones digit b = tenths digin c = hundreds digit d = thousands digit n = a + b / 10 + c / 100 + d / 1000 c = d + 3 b = c - 2 = d + 3 - 2 = d + 1 a = b + c = d + 1 + d + 3 = 2 d + 4 n = a + b / 10 + c / 100 + d / 1000 n = 2 d + 4 + ( d + 1 ) / 10 + ( d + 3...
August 23, 2012

Algebra
h = the height of the flagpole s = the height of the school h = ( 3 / 4 ) s s - h = 4.5 m s - ( 3 / 4 ) s = 4.5 ( 1 / 4 ) s = 4.5 Multiply both sides by 4 s = 18 The height of the school = 18 m
August 23, 2012

math
Take number 12 and subtract summ of first numbers 2 * 6 = 4 become 12 - ( 2 + 6 ) = 12 - 8 = 4 4 * 1 = 7 become 12 - ( 4 + 1 ) = 12 - 5 = 7 8 * 3 = 1 become 12 - ( 8 + 3 ) = 12 - 11 = 1 So 5 * 5 = x become 12 - ( 5 + 5 ) = 12 - 10 = 2 x = 2 5 * 5 = 2
August 20, 2012

Math
x = first number y = second number x - y = 16 that is equivalent of y = x - 16 x ^ 2 + y ^ 2 = x ^ 2 + ( x - 16 ) ^ 2 = x ^ 2 + x ^ 2 - 2 * x * 16 + 16 ^ 2 = 2 x ^ 2 - 32 x + 256 Quadratic equation a x ^ 2 + b x + c vhen a is positive in point : x = - b / 2 a have MINIMUM x...
August 20, 2012

Algebra
1.5 * 17.5 = 26.25 miles
August 17, 2012

Algebra2
1. Eliminate the absoulute value : x ^ 2 - 3 x + 3 = 3 x ^ 2 - 3 x + 3 = - 3 ______________________ x ^ 2 - 3 x + 3 = 3 Subtract 3 to both sides x ^ 2 - 3 x + 3 - 3 = 3 - 3 x ^ 2 - 3 x = 0 x ( x - 3 ) = 0 Solutions : x = 0 and x = 3 x ^ 2 - 3 x + 3 = - 3 Add 3 to both sides x...
August 17, 2012

Algebra2
1. Eliminate the absoulute value : 7 x + 2 = 10 7 x + 2 = - 10 _________________ 7 x + 2 = 10 7 x = 10 - 2 = 8 x = 8 / 7 7 x + 2 = - 10 7 x = - 10 - 2 = - 12 x = - 12 / 7 Solutions x = 8 / 7 aprox. 1.14 and x = - 12 / 7 aprox. - 1.71 2.Eliminate the absoulute value : Absolute ...
August 16, 2012

algebra 2
x + y = 2 Multiply both sides by 2 2 x + 2 y = 4 2 y = 4 - 2 x 3 x + 2 y = 9 3 x + 4 - 2 x = 9 x + 4 = 9 x = 9 - 4 = 5 x + y = 2 5 + y = 2 y = 2 - 5 = - 3
August 16, 2012

math
á = Greek letter alpha â = Greek letter beta
August 16, 2012

math
One of the most important properties of a straight line is in how it angles away from the horizontal. This concept is reflected in something called the "slope" of the line For straight lines, slope is constant (always the same). You can graph the points and "...
August 16, 2012

math
d = your digit d = 100 x + 10 y + z my hundreds digit is three more than my ones x = z + 3 that is equivalent with : z = x - 3 my tens digit is oneless than my hundreds y = x - 1 d = 100 x + 10 y + z d = 100 * x + 10 * ( x - 1 ) + x - 3 d = 100 x + 10 x - 10 + x - 3 = 111 x - ...
August 16, 2012

Algebra
If your expression mean : f ( x ) = 7 / ( x - 1 ) then : x = 0 f ( 0 ) = 7 / ( 0 - 1 ) = 7 / - 1 = - 7 x = 1 f ( 1 ) = 7 / 1 - 1 ) = 7 / 0 = infinity x = 2 f ( 2 ) = 7 / ( 2 - 1 ) = 7 / 1 = 7 x = 3 f ( 3 ) = 7 / ( 3 - 1 ) = 7 / 2 = 3.5 x = 4 f ( 4 ) = 7 / ( 4 - 1 ) = 7 / 3 = 2...
August 16, 2012

Math
Arithmetic mean : ( p1 + p2 + p3 + p4 + p5 ) / 5 = 21 Multiply both sides by 5 p1 + p2 + p3 + p4 + p5 = 21 * 5 = 105 p1 + p2 + p3 + p4 + p5 = Total points of team Total points of team = 105 If 4 other players obtained 1 point greatest score of one player could be : 105 - 4 = 101
August 15, 2012

algebra 1
3 ( 5 y - 5 x ) = 45 3 * 5 * ( y - x ) = 3 * 3 * 5 15 ( y - x ) = 3 * 15 Divide both sides by 15 y - x = 3 Add x to both sides y - x + x = 3 + x y = x + 3 If you must solve y = 0 0 = x + 3 Subtrac 3 to both sides 0 - 3 = x + 3 - 3 - 3 = x x = - 3 OR 3 ( 5 y - 5 x ) = 45 Divide...
August 14, 2012

Algebra 1
P = Perimeter W = Width L = Length P = 2 W + 2 L 36 = 2 * 4 + 2 L 36 = 8 + 2 L Subtract 8 to both sides 36 - 8 = 8 + 2 L - 8 28 = 2 L Divide both sides by 2 28 / 2 = 2 L / 2 14 = L L = 14 in
August 12, 2012

algebra
Vr = Vm * ( 1 - r ^ 2 / R ^ 2 ) Vr = ( 1 / 4 ) Vm ( 1 - r ^ 2 / R ^ 2 ) = 1 / 4 Multiply both sides by 4 4 * ( 1 - r ^ 2 / R ^ 2 )= 1 4 - 4 * r ^ 2 / R ^ 2 = 1 Subtract 4 to both sides 4 - 4 * r ^ 2 / R ^ 2 - 4 = 1 - 4 - 4 * r ^ 2 / R ^ 2 = - 3 Multiply both sides by - 1 4 * r...
August 11, 2012

trig
start-> programs-> Accessories-> Calculator-> View-> Scintific 17 sin
August 9, 2012

math
10 ^ 6 = 10 * 10 * 10 * 10 * 10 * 10 = 1 000 000 = one milion 4.97 * 10 ^ 6 = 4 970 000
August 9, 2012

Algebra
1,760 / 0.04 = 44,000 $
August 5, 2012

Algebra 1
d = r t 48 = r * 16 Divide both sides by 16 48 / 16 = r * 16 / 16 3 = r r = 3
August 5, 2012

Algebra
- 2 ( t - 7 ) - ( t + 8 ) = 8 - 2 * t - 2 * ( - 7 ) - t - 8 = 8 - 2 t + 14 - t - 8 = 8 - 3 t + 6 = 8 Subtrac 6 to both sides - 3 t + 6 - 6 = 8 - 6 - 3 t = 2 divide both sides by - 3 t = - 2 / 3
August 5, 2012

algebra
a + 7b = 17 - a + 2b = 2 __________ ( a - a ) + ( 7b - 2b ) = 17 - 2 5b = 15 Divide both sides by 5 b = 15 / 5 = 3 a + 7b = 17 a + 7 * 3 = 17 a + 21 = 17 Subtract 21 to both sides a + 21 - 21 = 17 - 21 a = - 4
August 5, 2012

mathematics
In point where firs derivative = 0 function have loca minimum or maximum. If second derivative < 0 that is local maxsimum. If second derivative > 0 that is local minimum. If expression 3cos2x mean : 3 cos (2 x ) then first derivative = - 6 sin ( 2 x ) - 6 sin( 2 x ) = 0 ...
August 4, 2012

math
x + 3 y = 7 Subtract 3 y to both sides x + 3 y - 3 y = 7 - 3 y x = 7 - 3 y Put x = 7 - 3 y into equation x + 4 y = 12 7 - 3 y + 4 y = 12 7 + y = 12 Subtract 7 to both sides 7 + y - 7 = 12 - 7 y = 5 Replacing y = 5 into x = 7 - 3 y gives x = 7 - 3 * 5 x = 7 - 15 x = - 8
August 4, 2012

math
Set of known values: x = 1 , y = 280 x = 2 , y = 480 x = 3 , y = 684 x = 4 , y = 913 x = 5 , y = 1205 x = 6 , y = 1615 The interpolating polynomial is : y = ( 17 x ^ 4 - 86 x ^ 3 + 139 x ^ 2 + 4730 x + 1920 ) / 24 For x = 7 , y = 2215 Next term : 2215
August 3, 2012

Algebra
After half hour studen have 9 - 1 = 8 $ x = 8 / 1.25 = 6.4 h A partial hour is charge the same as a full hour so x = 6 h 0.5 + x = 0.5 + 6 = 6.5 h
August 1, 2012

Mathematics
1 h = 60 min 9 h 07 mim = 8 h + 1 h + 7 min = 8 h + 60 min + 7 min = 8 h 67 min 9 h 7 min - 8 h 55 min = 8 h 67 min - 8 h 55 min = 12 min Distance : 1083 km - 957 km = 126 km The average speed : 1 h = 60 min 12 min = 1 / 5 h 126 / ( 1 / 5 ) = 5 * 126 = 630 km / h
July 31, 2012

maths
tan theta = H / L tan theta = 4 / 1.8 = 2.222222 theta = 65 ° 46 ´ 20 "
July 31, 2012

math
4 x + 3 y = 0 16 x + 3 = 8y ______________ Multiply the first equation by 4 16 x + 12 y = 0 16 x + 3 = 8y ______________ Subtract 8 y by second equation 16 x + 12 y = 0 16 x + 3 - 8 y = 8y - 8y = 0 ______________ 16 x + 12 y = 0 16 x + 3 - 8 y = 0 ______________ Subtract 3 by ...
July 31, 2012

calculus
Go on : wolframalpha dot com Whe page be open in rectangle type : derivative tan^4(2x) then click option = After few seconds when you see result click option : Show steps
July 28, 2012

Algebra
Remark: ¡Ý mean greater or equal
July 28, 2012

Algebra
5 ( x + 6 ) = 5 x + 30 12 x - 25 ¡Ý 3 x - 5 ( x + 6 ) 12 x - 25 ¡Ý 3 x - ( 5 / x - 6 ) ) 12 x - 25 3 x - ( 5 x + 30 ) 12 x - 25 ¡Ý 3 x - 5 x - 30 12 x - 25 ¡Ý - 2 x - 30 Add 2 x to both dides 12 x - 25 + 2 x ¡Ý...
July 28, 2012

math
12 % = 12 / 100 = 0.12 250 / 0.12 = 250 * 100 / ( 0.12 * 100 ) 25,000 / 12 = 2 * 2 * 2 * 5 * 5 * 5 * 5 * 5 / ( 2 * 2 * 3 ) = 2 * 5 * 5 * 5 * 5 * 5 / 3 = 6250/ 3 = 2083.3333...
July 28, 2012

Math
1 kg = 1000 g 2 kg 300 g = 1 kg + 1 kg + 300 g = 1 kg + 1000 g + 300 g = 1 kg 1300 g 2 kg 300 g - 1 kg 700 g = 1 kg 1300 g - 1 kg 700 g = 600 g The mass of the empty basket = 600 g
July 28, 2012

Math
L = 2 + 2 W = 2 ( 1 + W ) A = L * W 24 = 2 * ( 1 + W ) * W 24 = 2 * ( W + W ^ 2 ) Divide both sides by 2 12 = W + W ^ 2 Subtract 12 to both sides 0 = W + W ^ 2 - 12 Now you must solwe equation : W ^ 2 + W - 12 = 0 The exact solutions are 3 and - 4 Width cannot be negative so W...
July 27, 2012

math
The vertex of a parabola: y = a x ^ 2 + b x + c is the point where the parabola crosses its axis. If the coefficient of the x ^ 2 term is positive, the vertex will be the lowest point on the graph, the point at the bottom of the “U”-shape. If the coefficient of the x...
July 26, 2012

calculus
Go on: wolframalpha dot com When page be open in rectangle type: limit x^3-2/x^2+x as x-> - infinity and click option = After few seconds when you see result click option: Show steps On wolfram alpha dot com you can practice any kind of calculus. That is good just for ...
July 25, 2012

calculus
Go on: wolframalpha dot com When page be open in rectangle type: derivative sin(x^3-5x^2+4x-7) and click option = After few seconds when you see result click option: Show steps On wolfram alpha dot com you can practice any kind of calculus. That is good just for practice. You ...
July 23, 2012

math help
P.S. When you type : derivative (x^2+lnx)(2+e^x) you must click option = in rectangle
July 20, 2012

math help
Go on : wolframalpha dot com When page be open in rectangle type : derivative (x^2+lnx)(2+e^x) After few seconds when you see results click option : Show steps
July 20, 2012

math help
What is your question?
July 20, 2012

math
What is your question?
July 19, 2012

Geometry
tan ( theta ) = 4 / 3 theta = inverse tangent ( 4 / 3 ) theta = 53 ° 7 ´ 48 " theta = 53 ° to the nearest degree
July 19, 2012

Math
¡Ý mean greater or equal
July 18, 2012

Math
- 5 ( 4 x - 14 ) ¡Ý - 25 x + 35 - 20 x + 70 ¡Ý - 25 x + 35 - 20 x + 25 x ¡Ý 35 - 70 5 x ¡Ý - 35 Divide both sides by 5 x ¡Ý - 7 Ansver D
July 18, 2012

Algebra
The graph of any function in the form y = a x ^ 2 + b x + c is a parabola. A quadratic equationhas two solutions. In this case : x 1 = [ - 3 -s qrt ( 29 ) ] / 10 and x 2 = [ - 3 + sqrt ( 29 ) ] / 10 If coefficient a is positive then the graph of parabola is concave up. If ...
July 16, 2012

ALGEBRA
x = - 6 y = ( 4 / 3 ) * ( - 6 ) + 1 = - 24 / 3 + 1 = - 8 + 1 = - 7 x = - 3 y = ( 4 / 3 ) * ( - 3 ) + 1 = - 12 / 3 + 1 = - 4 + 1 = - 3 x = 6 y = ( 4 / 3 ) * 6 + 1 = 24 / 3 + 1 = 8 + 1 = 9 For plot : In google type : point plotter When you see list of result click on: Graph ...
July 15, 2012

ALGEBRA
The x-intercept of a line is the point at which the line crosses the x axis. ( i.e. where the y value equals 0 ) In this case : - 4 x + 9 * 0 = - 36 - 4 x = - 36 Divide both sides by -4 x = - 36 / - 4 = 9 x - intercept point (9,0) The z-intercept of a line is the point at ...
July 15, 2012

algebra
L = Length W = Width The perimeter of a rectangle P = 2 L + 2 W In this case W = 2 m P = 34 m 34 = 2 L + 2 * 2 34 = 2 L + 4 Subtract 4 for both sides 34 - 4 = 2 L + 4 - 4 30 = 2 L Divide both sides by 2 15 = L L = 15 m
July 14, 2012

Calculus
y = sqrt ( 3 x ) = sqrt ( 3 ) * sqrt ( x ) d y / d x =sqrt ( 3 ) * 1 / 2 sqrt ( x ) d y / d x = ( 1 / 2 ) * sqrt ( 3 / x )
July 12, 2012

Integrated Math 1
If you want to see graph go on: rechneronline.de In blue rectangle type : - x ^ 2 + 25 Set : Range x-axis from - 10 to 10 Range x-axis from - 10 to 40 and click option Draw
July 11, 2012

Integrated Math 1
Answer A.
July 11, 2012

Integrated Math 1
The standard equation of a parabola is : y = a x ^ 2 + bx + c The vertex of a parabola is the point where the parabola crosses its axis. If the coefficient of the x ^ 2 term is positive, the vertex will be the lowest point on the graph, the point at the bottom of the “U&#...
July 11, 2012

math
Rate Sam works : ( 1 job ) / x hrs Rate Denise works : ( 1 job ) / ( x + 2) hrs Rate together : 1 / x + 1 / ( x + 2 ) =
July 11, 2012

TRIG
cos theta = + OR - 1 / sqrt ( 1 + tan ^ 2 theta ) In Quadrant II, cosine are negative so : cos theta = - 1 / sqrt ( 1 + tan ^ 2 theta ) cos theta = - 1 / sqrt [ 1 + ( 3 / 4 ) ^ 2 theta ] cos theta = - 1 / sqrt ( 1 + 9 / 16 ) cos theta = - 1 / sqrt ( 16 / 16 + 9 / 16 ) cos ...
July 11, 2012

algebra
How can a square table have different length and height?
July 11, 2012

Integrated Math 1
- 1 - 6 x ^ 2 - x ^ 3 - ( - 2 - 4 x ^ 2 ) = - 1 - 6 x ^ 2 - x ^ 3 + 2 + 4 x ^ 2 = - x ^ 3 - 2 x ^ 2 + 1 OR 1 - 2 x ^ 2 - x ^ 3 Answer A.
July 11, 2012

Integrated Math 1
- 16 x ^ 2 - x ^ 3 - ( - 2 - 4 x ^ 2 ) = - 16 x ^ 2 - x ^ 3 + 2 + 4 x ^ 2 = - x ^ 3 - 12 x ^ 2 + 2
July 11, 2012

trigonometry
If a central angle theta = 3 pi / 2 then : Circumference of a circle = 2 * r * pi Ful circle have 360 ° = 2 pi radians. Lenght of arc : L = ( theta / 2 pi ) * 2 * r * pi L = theta * r = 60 ( 3 pi / 2 ) * r = 60 Multiply both sides by 2 3 pi * r = 120 Divide both sides by 3...
July 11, 2012

Math
f = frame = 2.5 cm p = dimension of frame p + f = dimension of one side of square Area of a square painting : A = ( p + f ) ^ 2 = 3600 p + f = sqrt ( 3600 ) p + f = 60 p + 2.5 = 60 p = 60 - 2.5 = 57.5 cm
July 11, 2012

Integrated math
Definite integral 1 to 3 ( 3 x ^ 2 - 2 x + 1 ) dx = ( x ^ 3 - x ^ 2 + x ) from 1 to 3 = ( 3 ^ 3 - 3 ^ 2 + 3 ) - ( 1 ^ 3 - 1 ^ 2 + 1 ) = 27 - 9 + 3 - ( 1 - 1 + 1 ) = 21 - 1 = 20
July 11, 2012

math
Domain: The domain of a function is the set of all possible input values which allows the function formula to work.
July 11, 2012

math
Range: The range is the set of all possible output values , which result from using the function formula. In this case when x = 0 2 / x ^ 2 -> infinity. So domain : ( -infinity , 0 ] U [ 0 , infinity ) Or all value of x different of 0
July 11, 2012

math
1 h = 60 min 15 min = 1 / 4 h 17 / ( 1 / 4 ) = 4 * 17 = 68 km / h
July 11, 2012

Trig
sqrt ( 3 ) * csc ( 2 theta ) = - 2 Divide both sides by sqrt ( 3 ) csc ( 2 theta ) = - 2 / sqrt ( 3 ) Take the inverse cosecant of both sides. 2 theta = - pi / 3 and 2 theta = 4 pi / 3 [ Becouse csc ( pi / 3 ) = 2 / sqrt ( 3 ) , and csc ( 4 pi / 3 = 2 / sqrt ( 3 ) ] Divide ...
July 10, 2012

Integrated Math 1
- 3 x ^ 2 + 10 x - 6 = - 3 x ^ 2 - 17 x + 2 Add 3 x ^ 2 + 17 x - 2 to both sides. - 3 x ^ 2 + 3 x ^ 2 + 10 x + 17 x - 6 - 2 = - 3 x ^ 2 + 3 x ^ 2 - 17 x + 17 x + 2 - 2 27 x - 8 = 0 Add 8 to both sides. 27 x - 8 + 8 = 0 + 8 27 x = 8 Divide both sides by 27 x = 8 / 27 when x = 8...
July 8, 2012

MAth
A = 4 pi r ^ 2 A = 28.26 28.26 = 4 pi r ^ 2 28.26 / ( 4 pi ) = r ^ 2 r ^ 2 = 28.26 / ( 4 * 3.14 ) r ^ 2 = 28.26 / 12.56 = 2.25 r = sqrt ( 2.25 ) = 1.5 in Question 2 A = 4 pi r ^ 2 A = 4 * pi * 3.5 ^ 2 A = 4 * 3.14 * 12.25 A = 153.86 in ^ 2 Question 3 V = 4 * pi * r ^ 3 / 3 V...
July 8, 2012

algebra
If your expression mean: 5 * 5 - 35 + 21 - ( - 3 ) * ( - 3 ) * ( - 3 ) then: ( - 3 ) * ( - 3 ) = 9 ( - 3 ) * ( - 3 ) * ( - 3 ) = ( - 3 ) * 9 = - 27 - ( - 3 ) * ( - 3 ) * ( - 3 ) = - ( - 27 ) = 27 5 * 5 - 35 + 21 - ( - 3 ) * ( - 3 ) * ( - 3 ) = 25 - 35 + 21 + 27 = 38
July 7, 2012

math
1 hour = 60 min 1 day = 24 hours = 24 * 60 = 1440 min 1 hour 18 min = 78 min D = Day N = Night D = N + 78 D + N = 1440 min N + 78 + N = 1440 2 N + 78 = 1440 2 N = 1440 - 78 = 1362 N = 1362 / 2 = 681 min D = N + 78 = 681 + 78 = 759 min 12 * 60 = 720 759 - 720 = 39 759 min = 12 ...
July 5, 2012

Math
2 1/2 =2.5 W = 30 ft L = 2.5 * W = 2.5 * 30 = 75 ft
July 4, 2012

Math
10 / ( 1 / 5 ) = 50 50 ft / s 50 * 20 = 1,000 ft
June 28, 2012

Maths - Ant Colony
Interpolation polynomial for first set : ( x ^ 5 - 100 x ^ 4 + 4375 x ^ 3 - 65000 x ^ 2 + 827500 x + 2250000 ) / 37500 Interpolation polynomial for second set : 8 x + 400 ( x ^ 5 - 100 x ^ 4 + 4375 x ^ 3 - 65000 x ^ 2 + 827500 x + 2250000 ) / 37500 = 8 x + 400 Real solution : ...
June 25, 2012

Math
To find relative maxima and minima, first find the critical points (where f´ ( x ) is 0 or doesn´t exist). Then examine each critical point. It is a relative maximum if f´ changes from positive to negative or f" is negative. It is a relative minimum if f...
June 24, 2012

Math
To find relative maxima and minima, first find the critical points (where fŒ is 0 or doesnft exist). Then examine each critical point. It is a relative maximum if fŒ changes from positive to negative or f is negative. It is a relative ...
June 24, 2012

arithmetic
No an = 41 ( n ^ 2 + 157 n + 9442 ) / ( 39680 - 320 n )
June 24, 2012

math
2 x - 3 y = 5 2 * 3 - 3 y = 5 6 - 3 y = 5 Add - 6 to both sides 6 - 6 - 3 y = 5 - 6 - 3 y = - 1 Divide both sides by - 3 y = - 1 / - 3 y = 1 / 3
June 18, 2012

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