Monday

October 20, 2014

October 20, 2014

Total # Posts: 1,742

**calculus**

Proof: x/2 + 6 = x/3 + 1 2 36/2 + 6 = 36/3 + 12 18 + 6 = 12 +12 24 = 24
*June 17, 2011*

**calculus**

x/2 + 6 = x/3 + 1 2 x/2 - x/3 = 12 - 6 [ Remark: x/2 = 3x/6 and x/3 = 2x/6 ] 3x/6 - 2x/6 = 6 (3x - 2x)/6 = 6 x/6 = 6 Multiply both sides with 6 x = 36
*June 17, 2011*

**math**

Go to: wolframalpha com When page be open in rectangle type: 1/x + 1/y = 1/14 and click option = When you see results couple times click option: More Solutions
*June 16, 2011*

**calculus**

In google type: wolfram alpha When you see list of results click on: Wolfram Alpha:Computation Knowledge Engine When page be open in rectangle type: sqrt((6x^2 + 5x + 1)^3) and click option = After few seconds you will see everything about that functions. Then click option: ...
*June 14, 2011*

**derivative **

In google type: wolfram alpha When you see list of results click on: Wolfram Alpha:Comutation Knowledge Engine When page be open in rectangle type: 2x^2(3-4x)^2 and click option = After few seconds you will see everything about that function. Then click option Derivative: Show...
*June 11, 2011*

**algebra**

go on: calc101 com When page be open click option: long division When page be open in rectangles type your polynoms and clik option DO IT
*June 9, 2011*

**Calculus AB**

In google type: wolfram alpha When you see list of results click on: Wolfram Alpha:Computational Knoweledge Engine When page be open in rectangle type: (x^2+5)/(x^3-x^2+x+3) and click option = After few secons you will see all about that function. Now click option: Partial ...
*June 5, 2011*

**Math - Logarithm**

(5+x)/(x-2)=2 5+x=2*(x-2) 5+x=2x-4 5+4=2x-x 9=x x=9
*June 5, 2011*

**Math**

tan(x/2) = [1 - cos(x)]/sin(x) tan(30°/2)=tan(15°) sin(30°)= 1/2 cos(30°)= sqroot(3)/2 tan(30°/2)=tan(15°)= [1 - cos(30°)]/sin(30°) = (1 - sqroot(3)/2)/(1/2) = 2 - sqroot(3) tan(15°) = 2 - sqroot(3) tan(345°)= -tan(15°) tan(345°...
*June 3, 2011*

**Math**

345°=360°-15° tan(A-B)=(tan A - tan B)/(1 - (tan A)*(tan B)) tan(360°)=0 tan(360°-15°)= tan(360°)-tan(15°)/(1-(tan(360°)*(tan(15°)) tan(360°-15°)= 0-tan(15°)/(1-0*(tan(15°)) tan(360°-15°)=tan(345°)= -tan(15&...
*June 3, 2011*

**Trig**

Remark: When you see step Simplify trigonometric functions: If we know that: tan^2(x)=sec^2(x)-1 tan^2(x)+sec^2(x)-1=0 becomes: sec^2(x)-1+sec(x)-1=0
*June 2, 2011*

**Trig**

In google type: wolfram alpha When you see lis of results click on: Wolfram Alpha:Computational Knowledge Engine When page be open in rectangle type: solve tan^2(x)=1-sec(x) and click option = After few secons you will see result. Then clic option Show steps
*June 2, 2011*

**math**

In google type : wolfram alpha When you see list of results click on: Wolfram Alpha: Computation Knowledge Engine When page be open in rectangle type: 4n^2+28n+49 and click option =
*May 31, 2011*

**math**

24x^4+24x^3=3x^2 Divide with 3x^2 8x^2+8x=1 8x^2+8x-1=0 If you dont know how to solve this equation in google type: quadratic equation online When you see list of results click on: Free Online Quadratioc Equation Solver:Solve by Quadratic Formula When page be open in rectangle...
*May 21, 2011*

**Math**

sqrt(32)=sqrt(2)*sqrt(16)=sqrt(2)*4 sqrt(50)=sqrt(2)*sqrt(25)=sqrt(2)*5 sqrt(128)=sqrt(2)*sqrt(64)=sqrt(2)*8 sqrt(32)-sqrt(50)+sqrt(128)= sqrt(2)*4-sqrt(2)*5+sqrt(2)*8= sqrt(2)*(4-5+8)= sqrt(2)*7 OR 7*sqrt(2)
*May 19, 2011*

**Algebra**

Go on this site: rechneronline.de/function-graphs In blue rectangle type your function and click option Draw
*May 19, 2011*

**math**

21+(9-7)*(5-4 )= 21 + 2*1 = 23
*May 17, 2011*

**Calculus**

In google type: wolfram alpha When you see list of results click on: Wolfram|Alpha;Cputational Knowledge Engine When page be open in rectangle type: (3x^2-28x-3)/(x^3-2x^2-3x) and click = You will see everybody about that expresion. Then click: Partial fraction expansion:Show ...
*May 15, 2011*

**Calculus**

If cos^-1(x^2) mean 1/cos(x^2) type cos[x^2]^(-1) If cos^-1(x^2) mean arccos(x^2) type arccos[x^2]
*May 13, 2011*

**Calculus**

In google type: calc101 When you see list of results click on first link. When page be open click option derivatives. When that page be open in rectangle type your function and click option DO IT. You will see solution step by step.
*May 13, 2011*

**math**

1km=1000m 1m=1/1000 km 5m=5/1000=0.005km
*May 12, 2011*

**algebra 2**

sin(2x)=2*sin(x)*cos(x) (1/2)sin(2x)=(1/2)*2*sin(x)*cos(x)=sin(x)*cos(x) (1/2)sin(2x)=sin(x)*cos(x)
*May 8, 2011*

**MATH HELP HELP HELP HELP HELP**

In google type: mathematical ciphers You will find something.
*May 8, 2011*

**Algebra**

8b+2x=6x-4a 8b+4a=6x-2x 8b+4a=4x 4x=4a+8b Divide with 4 x=a+2b
*May 8, 2011*

**math**

a(n+1)=a(n)/2 -5 a1=90 a2=90/2 -5= 45-5= 40 a3=40/2 -5= 20-5= 15 a4=15/2 -5= 7.5-5= 2.5 The next number is 2.5
*April 27, 2011*

**Calculus**

In google type calc101 When you see list of results click on: Calc101 com Automatic Calculus,linear Algebra,and Polynomals When page be open click option derivatives When that page be open in rectangle type your function and click option DO IT Type your equtations like that: x...
*April 18, 2011*

**pre cal**

sin(theta)=1/5 cos(theta)=sqroot[1-sin(teta)^2] cos(theta)=sqroot[1-(1/5)^2] cos(theta)=sqroot(1-1/25) cos(theta)=sqroot(25/25-1/25) cos(theta)=sqroot(24/25) cos(theta)=sqroot(6*4/25) cos(theta)=sqroot(6*2^2/5^2) cos(theta)=(2/5)*sqroot(6) sin(2theta)=2*sin(theta)*cos(theta) ...
*April 17, 2011*

**Calculus**

If you try to see graph of that function you can see that function: x^3-4x+5 havent absolute maximum or absolute minimum.
*April 17, 2011*

**Calculus**

Sorry: Second derivate=6x 6*1.1547005383792515290182975610039= 6.9282032302755091741097853660235>0 Function has local minimum for x=1.1547005383792515290182975610039 f(x)min=f(1.1547005383792515290182975610039)= 1.9207985643219959226178731706562
*April 17, 2011*

**Calculus**

Functionn has local maximum or minimum where first derivation=0 If second derivate<0 that is local maximum If second derivate>0 that is local minimum First derivation=3x^2-4=0 x=+/- 2/sqroot(3) sqroot(3)=1.7320508075688772935274463415059 x=+/- 2/1....
*April 17, 2011*

**algebra 1**

In google type: functions graphs online When you see list of results click on: rechneronline.de/function-graphs/ You will see graph of quadractic function.
*April 17, 2011*

**math**

x=12-4y 8x+5y= -12 8*(12-4y)+5y= -12 8*12-8*4y+5y= -12 96-32y+5y= -12 96-27y= -12 96+12=27y 108=27y Divide with 27 4=y y=4 x=12-4y x=12-4*4 x=12-16 x= -4
*April 17, 2011*

**Math(Please help)**

8^(2/3)=third root of (8^2) 8^(2/3)=third root of(64)=4
*April 17, 2011*

**Math**

In google type calc101 When you see list of results click on: Calc101 com Automatic Calculus,linear Algebra,and Polynomals When page be open click option derivatives When that page be open in rectangle type your function and click option DO IT 4*x*e^(x) ln[x-(1/3)x+1] ln[(2z-...
*April 17, 2011*

**MAth**

5*(2x-10)/2+14=19 5*(2x-10)/2=19-14 5*(2x-10)/2=5 Multiply with 2 5*(2x-10)=5*2 5*2x-5*10)=10 10*x-50=10 10*x=10+50 10*x=60 Diwide with 10 x=6 Proof: 5*(2*6-10)/2+14=5*(12-10)/2+14=5*2/2+14=5+14=19
*April 16, 2011*

**MAth**

IF 50=3(s=16)- 2(s-2) mean: 50=3*(s-16)-2*(s-2) then: 50=3*(s-16)-2*(s-2) 50=(3*s-3*16)-(2*s-2*2) 50=(3s-48)-(2s-4) 50=3s-48-2s+4 50+48-4=3s-s 94=s s=94 Proof: 3*(94-16)-2*(94-2)=3*78-2*92=234-184=50
*April 16, 2011*

**algebra**

4x+y=1 y=1-4x 6x+2y= -2 6x+2*(1-4x)= -2 6x+2-8x= -2 6x-8x= -2-2 -2x= -4 Divide with -2 x= -4/-2 x=2 y=1-4x y=1-4*2 y=1-8 y= -7 Proof: 6x+2y= -2 6*2+2*(-7)= -2 12+(-14)= -2 12-14= -2 -2= -2 4x+y=1 4*2+(-7)=1 8-7=1 1=1
*April 13, 2011*

**Algebra**

In google type When you see list of results click on: Polynomial division-Calc101com Automatic Calculus Linear... When page be open in rectacangle Divide type: (5x^4)-2 In rectacangle by type: 3x^2 Then click option DO IT You will see solution.
*April 11, 2011*

**Math**

* is sign for multiply
*April 11, 2011*

**Math**

W=Width L=Length P=Perimeter A=Area P=2(W+L) 200=2(W+L) Divide with 2 100=W+L 100-L=W W=100-L A=W*L=(100-L)*L A=100L-L^2 dA/dL=100-2L Function has minimum or maximum when first derivate=0 100-2L=0 100=2L Divide with 2 50=L L=50 yd If second derivate<0 then function has a ...
*April 11, 2011*

**science**

In google type: difference meteor meteorite You will find many sites about that question.
*April 11, 2011*

**Math**

If yor function: y= -1/2x mean y=(-1/2)*x then: Slope -1/2 y-intercept y=(-1/2)*0= 0
*April 11, 2011*

**Math**

y-intercept is a point where the graph of a function intersects with the y-axis y-intercept is value of y where x=0 y= -1/2x Slope -1/2 y-intercept y= -1/2*0= -1/0= +/- infinity y= 3x-4 Slope 3 y-intercept y=3*0-4=0-4= -4
*April 11, 2011*

**polynomials**

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^2-21x+84=0 and click option solve it You will see solution step-by-step
*April 11, 2011*

**algebra**

(m-4)^2=m^2-2*m*4+4^2=m^2-8m+16
*April 11, 2011*

**geometry**

In google type: wikipedia platonic solid When you see list of results cicki on: Platonic solid-Wikipedia,the free encyclopedia
*April 11, 2011*

**maths**

a*b*c*d=2145 a*b=65 a*b*c*d=2145 65*c*d=2145 c*d=2145/65=33 c*d=33 Only two prime numbers with that product is 3 and 11 3*11=33 3+11=14 Answer D
*April 11, 2011*

**maths**

In google type: functions graphs online When you see list of results click on: rechneronline.de/function-graphs/ In blue rectangle type: x^2-6x-10 In gray rectangle type: x In Range x-axis from type -7 to 13 In Range y-axis from type -25 to 25 then click option Draw
*April 11, 2011*

**science**

That I find in wikipedia: The "strongest" human muscleSince three factors affect muscular strength simultaneously and muscles never work individually, it is misleading to compare strength in individual muscles, and state that one is the "strongest". But ...
*April 9, 2011*

**Math**

Perimeter of rectangle: P=2w+2l P=2(w+l) Area of rectangle: A=w*l w=width l=length w=6in l=8in P=2(w+l) P=2*(6+8)=2*14=28in A=w*l=6*8=48in^2 Ratio 1:2 w=2*6=12in l=2*8=16in P=2(w+l) P=2*(12+16)=2*28=56in A=w*l=12*16=192in^2 Ratio 1:3 w=3*6=18in l=3*8=24in P=2(w+l) P=2*(18+24)=...
*April 9, 2011*

**Math**

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: 2x^2+3 In Range x-axis from type -2.5 to 2.5 In Range y-axis from type 2 to 12 and click option Draw You will see graph.
*April 9, 2011*

**math**

f(g(x)) means that wherever you see x in f(x) you replace it with the expression for g(x) So: f(g(x)))=3(g(x))-2=3*(4x-1)-2=12x-3-2= 12x-5
*April 9, 2011*

**math**

In google type: Rewrite the equation with the right side completely When you see list of results click on: AIDS Cases From 1993 to 2003 math help? You will see solution.
*April 8, 2011*

**Math**

sqroot(9)= 3 OR -3
*April 7, 2011*

**Math**

You also can write: b=sqroot(9) b= -3 a=108/b a=108/ -3 a= -36 a= -36 b= -3 a*b=(-36)*(-3)=108 a/b= -36/ -3=12
*April 7, 2011*

**Math**

a=first number b=second number a*b=108 Divide with b a=108/b a/b=12 (108/b)/b=12 108/b^2=12 108=12*b^2 Divide with 12 9=b^2 b=sqroot(9) b=3 a=108/b a=108/3 a=36 a=36 b=3 a*b=36*3=108 a/b=36/3=12
*April 7, 2011*

**3rd grade math**

OR: 1 24 2 27 3 30 4 33 5 36 6 39 7 42 8 45 9 48 10 51 11 54 12 57 13 60 14 63 15 66 16 69 17 72 18 75 etc
*April 5, 2011*

**3rd grade math**

You must add 3 for all next output number. Series: 4 33 5 36 6 39 7 42 8 45 9 48 10 51 11 54 12 57 13 60 14 63 15 66 16 69
*April 5, 2011*

**Math**

10^9=1,000,000,000 10^-8=0.00000001 10^5=100,000 10^-6=0.000001 10^0=1 10^-8,10^-6,10^0,10^5,10^9
*April 5, 2011*

**Math**

100%-30%=70%=70/100 36*70/100=2520/100= 25.20 $
*April 5, 2011*

**4th grade math**

45/90=45/(2*45)=1/2=0.5
*April 5, 2011*

**math**

W=Width
*April 5, 2011*

**math**

L=Lenght W=With A=Area L=3W A=L*W=108 108=3W*W 3W^2=108 Divide with 3 W^2=108/3 W^2=36 W=sqroot(36) W=6 cm L=3W L=3*6=18 cm A=L*W=18*6=108 cm^2
*April 5, 2011*

**math**

3yd 1ft-1yd 2ft=1yd 2ft
*April 5, 2011*

**math**

1yd=3ft 3yd=3*3=9ft 3yd 1ft=9ft+1ft=10ft 1yd 2ft=3ft+2ft=5ft 3yd 1ft-1yd 2ft=10ft-5ft=5ft 5ft=3ft+2ft=1yd 2ft
*April 5, 2011*

**Math**

10^-8= 1/10^8 = 1/100,000,000 = 0.00000001
*April 4, 2011*

**Math**

4.3*10^3 * 2*10^-8= 4.3*2*10^3*10^-8= 8.6*10^[3+(-8)]= 8.6*10^(3-8)= 8.6*10^-5= 8.6/10^5= 8.6/100,000= 0.000086
*April 4, 2011*

**Math**

4z^3*(3z-1)+7(3z-1)= 4z^3*(3z-1)+(7*3)*z+7*(-1)= 4z^3*3z+4z^3*(-1)+21z-7= 12z^4-4z^3+21z-7 By the way in google type: Expessions Simplifier When you see list of results click on: Expessions Simplifier and Solver-Algebra com When page be open in rectacangle type your equation ...
*April 4, 2011*

**Math**

0.09 x 10^12= 9*10^-2 * 10^12 = 9*10^(-2+12) = 9*10^10
*April 4, 2011*

**math**

2(5656)-93872=2*5656-93872=11312-93872= -82560
*April 3, 2011*

**math**

In google type: Solver Solving a System of Linear Equations by Elimination When you see list of results click on: Solver Solving a System of Linear Equations by Elimination/Addition When page be open in rectacangles type your coefficients 1 row 5 3 2 2 row 6 4 7 and click ...
*April 3, 2011*

**math polynomials**

In google type: Algebra Solver and Math Simplifier that SHOWS WORK When you see list of results clik on: Algebra Solver and Math Simplifier that SHOWS WORK In rectacangle type your expresion and click option: SOLE OR SIMPLIFY You will se solution step by step
*April 3, 2011*

**Math**

In google type: calc101 When you see list of results click on: Calc101com Automatic Calculus,Linear Algebra and Polynomials When page be open clik option: derivatives When this page be open in rectacangle type: 2x-(x^2+1)^7/3 and click options DO IT You will see solution step-...
*April 2, 2011*

**math**

-2-6= -(2+6)= -8
*April 2, 2011*

**math problem**

U=Uk territories D= Denmark territories N=Norway territories U+D+N=20 N=U/5 D=2 U+D+N=20 U+2+U/5=20 U+U/5=20-2 6U/5=18 Multiply with 5 6U=18*5 6U=90 Divde with 6 U=90/6=15 U=15 N=U/5=15/5=3 N=3 United Kingdom= 15 territories Denmark= 2 territories Norway= 3 territories
*March 31, 2011*

**math**

Ms.Sue How I can put link in My answer? Everytime when I try that I see message: You are not allowed to post internet addresses. If you own a website and would like Jiskha com to link to it, please submit your URL.
*March 31, 2011*

**Math**

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: sqr(x+1) If f^-1 mean 1/f(x) in grey rectacangle type: 1/sqr(x+1) Then click option Draw You will see graph of your ...
*March 31, 2011*

**math**

40/16=2.5 16*2.5=40 40*2.5=100 100*2.5=250 250*2.5=625 625*2.5=1562.5 1562.5*2.5=3906.25 etc
*March 31, 2011*

**math**

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 + 2 x + 9 In Display properties set: Range y-axis from -7 to 13 Then click option Draw You will see graph of your ...
*March 30, 2011*

**math**

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: 1+sqr(x) in gray rectacangle type: (3+x)/3 and click option Draw
*March 30, 2011*

**Math**

90=2*45
*March 29, 2011*

**Math**

In google type: calc101 When you see list of results click on: Calc101com Automatic Calculus,Linear Algebra and Polynomials When page be open clik option: derivatives When this page be open in rectacangle type: -460+100Q-Q^2 In rectacangle with respect to: type Q in ...
*March 25, 2011*

**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 rectacangle type: 3b^2+b-10=0 and click option solve it You will see solution step-by-step
*March 23, 2011*

**Math **

In google type: Solver Solving a System of Linear Equations by Elimination When you see list of results click on: Solver Solving a System of Linear Equations by Elimination/Addition When page be open in rectacangles type your coefficients 1 row 2 10 58 2 row -14 8 140 and ...
*March 23, 2011*

**math**

Area=(1/2)*base*hight A=(b*h)/2 A=Area=132.54cm^2 b=base=9.4cm h=hight A=(b*h)/2 132.54=(9.4*h)/2 Multiply with 2 265.08=9.4*h Divide with 9.4 h=265.08/9.4 h=28.2 cm
*March 22, 2011*

**6th grade math**

A=5^2=5*5=25 m^2
*March 21, 2011*

**math**

Your function have y-intercept y= -17 For x=0 y= -x^2-8x-17= -0^2-8*0-17=0-0-17= -17 If you want to see graph with y-intercept in Display properties set: Range x-axis from -8 to 2 Range y-axis from -18 to 2
*March 21, 2011*

**math**

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^2-8x-17 In Display properties set: Range x-axis from -8 to 2 Range y-axis from -8 to 2 Then click option Draw You ...
*March 21, 2011*

**math**

One of solutions is obviously: x=0
*March 20, 2011*

**math**

The slope of the tangent line is equal to the first derivative. You must find where is first derivative=0 In this case the tangent line is horizontal. In google type: calc101 When you see list of results click on: Calc101com Automatic Calculus,Linear Algebra and Polynomials ...
*March 20, 2011*

**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 rectacangle type: 6x=x^2-6 and click option solve it You will see solution step-by-step
*March 19, 2011*

**math/ geomery**

That is the wrong answer. p=first diagonal=4 q=second diagonal=12 a=sqroot[(p/2)^2+(q/2)^2] a=sqroot[(4/2)^2+(12/2)^2] a=sqroot(2^2+6^2) a=sqroot(4+36) a=sqroot(40) a=sqroot(4*10) a=2*sqroot(10) OR: p^2+q^2=4a^2 Divide with 4 a^2=(p^2+q^2)/4 a=sqroot[(p^2+q^2)/4] a=sqroot(p^2+...
*March 19, 2011*

**math**

In google type: calc101 When you see list of results click on: Calc101com Automatic Calculus,Linear Algebra and Polynomials When page be open clik option: derivatives When this page be open in rectacangle type your equation and click options DO IT You will see solution step-by...
*March 17, 2011*

**math**

In google type: calc101 When you see list of results click on: Calc101com Automatic Calculus,Linear Algebra and Polynomials When page be open clik option: derivatives When this page be open in rectacangle type: x^2*e^x and click options DO IT You will see solution step-by-step...
*March 14, 2011*

**math**

You can check that. In google type: Circumference When you see list of results click on : Circumference-Wikipedia,the free encyclopedia
*March 14, 2011*

**math**

Answer of Ms.Sue is wrong. The circumference is the distance around a closed curve. Circumference is a special perimeter. The circumference of a circle is the length around it. The circumference of a circle can be calculated using the formulas: C=d*pi Wher d is diameter OR C=2...
*March 14, 2011*

**Math**

P=Perimeter A=Area a,b=sides of rectacangle P=2a+2b P=2(a+b) Divide with 2 P/2=a+b a+b=P/2 a+b=16/2 a+b=8 b=8-a A=a*b A=a*(8-a) A=8a-a^2 A=-a^2+8a Function have extreme value in point where first derivative=0 First derivative: dA/da=-2a+8 dA/da=0 -2a+8=0 8=2a Divide with 2 a=...
*March 10, 2011*

**Math**

In google type: calc101 When you see list of resultc click on: Calc101com Automatic Calculus,Linear Algebra and Polynomials When page be open clik option: derivatives When this page be open in rectacangle type: 3/(1+2(x^3)) and click options DO IT You will see solution step-by...
*March 10, 2011*

**Math/Algebra**

In google type: "quadratic equation online" When you see list of results click on: webgraphingcom/quadraticequation_quadraticformula.jsp In rectacangle type: y^2-4y-12=0 and click option solve it
*March 8, 2011*

**math please help**

In google type: math celebrity long division When you see list of results click on: Addition-Sbtraction-Multiplication-Long Division Calculator When page be open click option: Calculator In first rectacangle type 8 In second rectacangle type 1195 and click option: Long ...
*March 7, 2011*

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