Monday

September 22, 2014

September 22, 2014

Total # Posts: 1,715

**Math**

On: rechneronline.de/function-graphs/ In Dispay properties type follow values: Range x-axis from -6.28 to 6.28 Range y-axis from -5.5 to 1.5
*January 22, 2011*

**Math**

I suppose that 90 in your first equation is 90° 90°=(pi/2) radians y+3= 2sin(3x +90°) y=2sin(3x +90°)-3 y=2sin(3x +90°)-3 Angle in degres y= 2sin(3x +pi/2)-3 Angle in radians In google type: "function graphs on line" When you see list of results ...
*January 22, 2011*

**Math**

3/6=1/2 7sqrt(3/6)=7sqrt(1/2)=7/sqrt(2)
*January 22, 2011*

**Math**

8/9=20/x 8x=20*9 8x=180 Divide with 8 x=180/8 x=(2*2*45)/(2*2*2)=45/2=22.5
*January 22, 2011*

**math**

sin(A)=cos(90°-A) cos(33°)=sin(90°-33°)=sin(57°)
*January 21, 2011*

**math**

In google type: "quadratic equation online" When you see list of result click on: webgraphingcom/quadraticequation_quadraticformula.jsp When this page be open in rectacangle type equation: 3a^2+6a-189=0 and click option solve it! You will see solutions of this ...
*January 20, 2011*

**math**

Fist number= a Second number= a+1 Third number= a+2 a^2+(a+1)^2+(a+2)^2=194 (a+1)^2=a^2+2*a*1+1^2=a^2+2a+1 (a+2)^2=a^2*2a*2+2^2=a^2+4a+4 a^2+a^2+2a+1+a^2+4a+4=194 3a^2+6a+1+4=194 3a^2+6a+5-194=0 3a^2+6a-189=0 The exactsolutions of this equation are: a=7 and a=-9 Solution: ...
*January 20, 2011*

**math**

0<x<15cm x= larger of 0 and lesser of 15cm
*January 20, 2011*

**Math/Trig**

L=r*aplha alpha in radians L=7.7 alpha=pi/7 7.7=r*(pi/7) divide with (pi/7) r=7.7/(pi/7) r=(7.7*7)/pi r=53.9/3.1415926535 r=17,1569cm r=17.2cm
*January 20, 2011*

**math**

7/7=1
*January 20, 2011*

**math help please!!**

log(x-2)= 1-log(x+1) log(x-2)+log(x+1)=1 log(a)+log(b)=log(a*b) log(x-2)+log(x+1)=log((x-2)*(x-1)) 1=log(10) log((x-2)*(x-1))=log(10) So: (x-2)*(x+1)=10 x^2-2x+x-2=10 x^2-x-2=10 x^2-x-2-10=0 x^2-x-12=0 Exact solutions of this equation is: -3 and 4 Negative numbers have not ...
*January 20, 2011*

**math log**

Third row have typefeler Correct formula is: log(a+b)=log(a)+log(b)
*January 20, 2011*

**math log**

7.2=36/5 36=6*6 log(a+b=log(a)+log(b) log(36)=log(6)+log(6)=2*log(6) log(a/b)=log(a)-log(b) log(36/5)=2*log(6)-log(5) log(6)=m log(5)=n log(36/5)=log(7.2)=2m-n
*January 20, 2011*

**college math 209**

In google type "quadratic equation online" when you see list of results click on: webgraphingcom/quadraticequation_quadraticformula.jsp Whenn this page be open in rectacangle type your equation,and click option solve it and you will see solution Step-by-step
*January 16, 2011*

**college math 209**

In google type "quadratic equation online" when you see list of results click on: webgraphingcom/quadraticequation_quadraticformula.jsp When this page be open in rectacangle type your equation,and click option solve it You will see solution Step-by-step
*January 16, 2011*

**Math/Trigonometry**

1 revolution=2*pi radians 1.6*2*3.1415926535=10,0530964912 radians nearest tenth=10 radians
*January 14, 2011*

**Math/Trig**

Area of circle: A=r^2*pi Area of your sector=r^2*pi*(125/360)=3^2*pi*125/360=9*pi*125/360 =9*3.1415926535*125/360 =3534,2917351875/360 =9,8174770421875 m^2
*January 14, 2011*

**math**

In google type "functions graphs online" When you see list of results click on: rechneronline.de/function-graphs/ When page be open type your fuction and click option Draw
*January 14, 2011*

**11th grade math**

Go to: en wikipedia org And type:Absolute value You will see everything about Asolute Value including graph.
*January 13, 2011*

**math**

In google type "composite numbers " When you see list of results click on en.wikipedia and you can find everything about composite numbers
*January 12, 2011*

**math**

1+4+s= 5+s
*January 12, 2011*

**math**

-3(3x+15)-(10+x)=35 -9x-3*15-10-x=35 -9x-45-10-x=35 -10x-55=35 -10x=35+55 -10x=90 x=90/(-10) x=-9
*January 12, 2011*

**math**

Standard notation is just the number like 248 or 822 or.... and so on, or it is a number completely written out without any shortcuts.
*January 12, 2011*

**integrated math**

y=210-6b
*January 10, 2011*

**math**

In mathematics, an irrational number is any real number which cannot be expressed as a fraction a/b 30=2*3*5 sqroot(30)=sqroot(2)*sqroot(3)*sqroot(5) sqroot(2), sqroot(3) and sqroot(5) is irrational numbers. sqroot(30) is irrational too. The real numbers are the numbers that ...
*January 10, 2011*

**Math**

2*log(x)-log(4)-log(3)+log(x)=2logx+logx-log4-log3 =3*log(x)-[log(4)+log(3)] log(x^n)=n*log(x) 3*log(x)=log(x^3) log(a)+log(b)=log(a*b) log(4)+log(3)=log(4*3)=log(12) log(a)-log(b)=log(a/b) 3*log(x)-[log(4)+log(3)]=log[(x^3)/12]
*January 10, 2011*

**math**

|60| = 60 |-60| = 60 60-60=0
*January 10, 2011*

**math**

You also can write fraction: 3.9/1.2=x/500 1.2*x=3.9*500 1.2*x=1950 Divide with 1.2 x=1950/1.2 x=1625
*January 8, 2011*

**math**

copper/nickel=3.9/1.2=3.25 500*3.25=1625 kg of copper
*January 8, 2011*

**Math**

7/20=(7*5)/(20*5)=35/100=0.35
*January 7, 2011*

**math**

1meter=100 centimeters=10^2 centimeters 1m=10^2cm 1m^3=(10^2)^3=10^6 cm^3=1000000 cm^3 1kilometer=1000meters=10^3 meters 1km^2=(10^3)^2=10^6 cm^2=1000000 cm^2
*January 6, 2011*

**math**

1meter=100cm=10^2cm 1m^3=(10^2)^3=10^6 cm^3=1000000 cm^3
*January 6, 2011*

**math**

1 liter= 1cubic decimeter 1dm= 10cm 1dm=10^2cm 1L=1dm^3=(10^2)^3=10^6 cm^3=1000000 cm^3 2L=2*10^6 cm^3=2000000 cm^3 One litre of water has a mass of one kilogram. Two litre of water has a mass of 2 kilograms.
*January 6, 2011*

**Math (algebra)**

(y-1)/2u+x=m (y-1)/2u=m-x y-1=2u*(m-x) Divide with (m-x) 2u=(y-1)/(m-x) Divide with 2 u=(y-1)/[2*(m-x)]
*January 6, 2011*

**Math 3**

11*13=143 6/11=(6*13)/143=78/143 2/13=(2*11)/143=22/143 6/11+2/13=(78/143)+(22/143)=100/143
*January 6, 2011*

**math**

8.7
*January 2, 2011*

**8th grade math**

3x+3y=-6 3y=-6-3x Divide with 3 y=-2-x 7x+4y=1 7x+4*(-2-x)=1 7x-8-4x=1 3x-8=1 3x=1+8 3x=9 Divide with 3 x=9/3 x=3 y=-2-x y=-2-3 y=-5 x=3 y=-5 Cheking of results: 3x+3y=3*3+3*(-5)=9-15=-6 7x+4y=7*3+4*(-5)=21-20=1
*December 21, 2010*

**math**

x+5y=-4 y=3x-4 x+5*(3x-4)=-4 x+15x-20=-4 16x=-4+20 16x=16 Divide wth 16 x=1 y=3x-4 y=3*1-4 y=3-4=-1 x=1 y=-1 Cheking of result: y=3x-4 -1=3*1-4 -1=3-4 -1=-1 x+5y=-4 1+5*(-1)=-4 1-5=-4 -4=-4
*December 21, 2010*

**art**

Go to images.google com and type scgraffito any you can see some examples.
*December 21, 2010*

**Math Problem Solving**

6n+(8n-2n)+3/2=6n+8n-2n+3/2 6n+8n-2n=14n-2n=12n 6n+8n-2n+3/2=12n+(3/2)
*December 21, 2010*

**math**

A=(1/2)*a*h A=255 - Area h=15 - hight a - lenght of base 255=(1/2)*a*15 Multiply with 2 510=15*a Divide with 15 a=510/15=34 a=34ft Checking of results: A=(1/2)*a*h A=(1/2)*34*15 A=(1/2)*510 A=255ft squared
*December 21, 2010*

**math**

x+9-6=7 x+3=7 x=7-3 x=4
*December 21, 2010*

**MAth**

If your solution x=315 you solve it correctly.
*December 18, 2010*

**Math**

A secant line of a curve is a line that (locally) intersects two points on the curve. You must know equation of curve f(x) if you want to find secant line.
*December 18, 2010*

**math**

liter is unit of volume not of force
*December 18, 2010*

**math**

1cm=(1/100)m 1m=100cm 100m=100*100=10000cm
*December 17, 2010*

**MATH**

-7+2=-5 |-5|=5 |-4|=4 5-4=1
*December 15, 2010*

**Math**

In google type: "quadratic equation online " When you see results clik on webgraphingcom/quadraticequation_quadraticformula.jsp type you equation and click solve it and you will see solution step by step.
*December 15, 2010*

**Aims math [help please very appreciated]**

15x-2x=21-4 13x=17 Divide wit 13 x=17/13
*December 15, 2010*

**5th math**

(1/4)*(2/2)=2/8 (1/4)=(2/8) (1/4)+(1/8)= (2/8)+(1/8) =3/8
*December 15, 2010*

**math**

2x^2 -12x +23=2*(x^2-6x+23/2) (x-a)^2= x^2-2ax+a^2 (x-3)^2= x^2-2*3*x+3^2= x^2-6x+3^2 2*(x^2-6x+23/2)= =2*(x^2-2*3*x +3^2+ 23/2 -3^2) =2(x^2-6x+3^2)+2*(23/2)-2*(3^2) =2*(x-3)^2+23-2*9 =2*(x-3)^2+23-18 =2*(x-3)^2 +5 Proof: 2*(x-3)^2+5=2*(x^2-2*3*x+3^2)+5 =2*(x^2-6x+9)+5 =2x^2-...
*December 10, 2010*

**math**

sqroot(5*1215)=sqroot(6075)=77.9423
*December 9, 2010*

**Math**

2/3=0.66666666 7/11=0.6363636 Larger is 0.67
*December 6, 2010*

**Math**

a=first number b=second number a+b=44 b=5+2a a+b=a+5+2a =3a+5= 44 3a+5=44 3a=44-5 3a=39 Divided with 3 3a/3=39/3 a=13 b=5+2a b=5+2*13 b=5+26 b=31 a+b=13+31=44
*December 6, 2010*

**math**

(ã2y*ã8y*ã3=ã(2*8*y^2)*ã3=ã(16*y^2)*ã3 =-4y*ã3 OR =4y*ã3 Becouse ã16= -4 OR 4 and ãy^2=y
*December 5, 2010*

**Math**

x^2+5x-3x-15=9 x^2+2x=9+15 x^2+2x=24 x^2+2x+1=24+1 (x+1)^2=25 Becouse: (x+1)^2=x^2+2x+1 x+1=sqroot(25) x+1=5 and x+1=-5 x+1=5 x=5-1=4 x+1=-5 x=-5-1=-6 Solutions is: x=4 and x=-6
*December 4, 2010*

**Math**

a=shorter leg b=longer leg c=hypotenuse a=b-14 c^2=a^2+b^2 26^2=(b-14)^2+b^2 676=b^2-2*b*14+14^2+b^2 676=2b^2-28b+196 676-196=2(b^2-14b) 480=2(b^2-14b) Divide with 2 240=b^2-14b b^2-14b=240 b^2-14b+7^2=240+7^2 Becouse: (b-7)^2=b^2-14b+7^2 (b-7)^2=240+49 (b-7)^2=289 b-7=sqroot(...
*December 4, 2010*

**math**

3x^2+11x+5=15 3x^2+11x+5-15=0 3x^2+11x-10=0 ax^2+bx+c=0 a=3 , b=11 , c=-10 In google type "square equation online" and select some site.
*December 1, 2010*

**Math**

71%=71/100=0.71 510*0.71=362.1 million square kilometers
*November 30, 2010*

**math**

Area=a*b A=a*b=12 Area=12 12=a*b Divide with b 12/b=a a=12/b Perimeter=2*a+2*b P=25 25=2*(12/b)+2*b 25=(24/b)+2*b Mulitiple with b 25b=24+2*b^2 Solutions of this equation is: b=[sqroot(433)]/4+(25/4) =5.202163 +6.25=11.452163 a=12/b=(12/11.452163)=1.047837 a=1.047837 b=11....
*November 29, 2010*

**math**

The angles of a parallelogram satisfy the identities: A=C B=D A+B=180° A+B+C+D=360°. C=A=(2x+25) D=B=(3x-5) A+B=180° 2x+25+3x-5=180° 5x+20°=180° 5x=180°-20° 5x=160° x=160°/5 x=32° A=C=(2x+25°)=2*32°+25°=64°+25°=89...
*November 25, 2010*

**math**

33=3*11 65=5*13 33/65=(3*11)/(5*13)
*November 23, 2010*

**Math**

18=2*3*3 24=2*2*2*3 18/24=(2*3*3)/(2*2*2*3)=3/(2*2)=3/4 9=3*3 12=2*2*3 9/12=(3*3)/(2*2*3)=3/(2*2)=3/4 15=3*5 20=2*2*5 15/20=(3*5)/(2*2*5)=3/(2*2)=3/4 6=2*3 9=3*3 6/9=(2*3)/(3*3)=2/3
*November 21, 2010*

**math**

C=d*pi= 200*pi= 200*3.14= 628 meters
*November 21, 2010*

**Algebra**

-y=4-3x Multiply with(-1) y=3x+4 (Slope=3) Remember, any two perpendicular lines are negative reciprocals of each other. So if you're given the slope of 3, you can find the perpendicular slope by this formula: mp=(-1)/m where: m-slope of line y=3x+4 mp is the perpendicular...
*November 21, 2010*

**Math**

F-lenght of first size S-lenght of second size T-lenght of third size S=F+3 T=(4/5)*F F+S+T=F+F+3+(4/5)F=384 2F+3+(4/5)F=384 2F+(4/5)F=384-3 2F+(4/5)F=381 Multiply with 5 10F+4F=381*5 14F=1905 Divide with 14 F=1905/14 S=F+3=(1905/14)+(42/14) Becouse (42/14)=3 S=1947/14 T=(4/5...
*November 21, 2010*

**6th grade Math**

11-7=4 4/11 not red
*November 20, 2010*

**Math**

s=v^1/3=third root(v) s=third root(729)=9
*November 20, 2010*

**Math**

a1=34-9*d Becouse nth member in arithmetic progression is: an=a1+(n-1)*d a10=a1+(10-1)*d a10=a1+9*d a10-9*d=a1 a a1=a10-9*d a1=34-9*d an=a1+(n-1)*d a25=a1+(25-1)*d a25=a1+24*d a25=7+24*3 a25=7+72=79
*November 19, 2010*

**Math**

The sum of members of a arithmetic progression is: Sn=(n/2)*[2a1+(n-1)*d] a1-first number in arithmetic progression d-common difference of successive members n-numbers of members In this case: n=20 , (n/2)=10 , n-1=19 a1=a10-9*d a1=34-9*d Sn=(n/2)*[2a1+(n-1)*d] =10*[2*(34-9*d...
*November 19, 2010*

**Algebra**

z-5-7(z-3)+3(5z+1)=z-5-7z+21+15z+3 =9z+19
*November 19, 2010*

**math**

50/20=2.5lb
*November 19, 2010*

**math**

30%=30/100 (30*74)/100=22.2 74-22.2=51.8$ OR 30%=30/100=0.3 1-0.3=0.7 0.7*74=51.8$
*November 19, 2010*

**algebra**

5a+7a^2+3a= 8a+7a^2= a(8+7a)
*November 18, 2010*

**Algebra 2**

an=a1+(n-1)*d a8=a1+(8-1)*5 a8=a1+7*5 a8=a1+35 a8-35=a1 a1=a8-35 a1=56-35 a1=21 So this arithmetic sequence is: 21,26,31,36,41,46,51,56
*November 18, 2010*

**arithmetic**

In wikipedia type "Arithmetic progression" you wil find everythink about Arithmetic progression Sn=sum of numbers Sn=(n/2)*[2a1+(n-1)*d] In this case: n=40 a1=19 d=5 S40=(40/2)*[2*19+(40-1)*5]=20*(38+39*5)=20*(38+195)=20*233=4660
*November 17, 2010*

**Algebra II**

(ã3mn)^9=(ã3)^9*(mn)^9 =3^(9/2)*(mn)^9 =3^(9/2)*m^9*n^9 Becouse: ã3=3^(1/2) (3^(1/2))^9= 3^(9/2)
*November 17, 2010*

**Math**

24=2^3*3
*November 17, 2010*

**Math**

3*4*2*(x^2*x*x^3)=24x^6
*November 17, 2010*

**math**

1000/10=100 tens in 1000 6000/100=60 hundreds in 6000 2000000/1000=2000 thousands in 2000000
*November 11, 2010*

**8th grade math**

100%-93.2% = 6.8%
*November 10, 2010*

**math**

1.035^20.148791684000665883041124279516 =2 2*1000=2000
*November 9, 2010*

**math**

1000*1.035^n=2000 Divide with 1000 1.035^n=2 n*log(1.035)=log(2) Divide with log (1.035) n=log(2)/log(1.35) =20.148791684000665883041124279516 OR 1000*1.035^n=2000 Divide with 1000 1.035^n=2 n*ln(1.035)=ln(2) Divide with ln (1.035) n=ln(2)/ln(1.35)=20....
*November 9, 2010*

**Math**

ln[e^5x/[x*(x^4+1)]] =ln(e^5x)-ln([x)*(x^4+1)] =5x-[1n(x)+ln(x^4+1] =5x-ln(x)-ln(x^4+1)
*November 9, 2010*

**math**

34/123.08 3400:12308=0.276243 34000 -24616 ------- 93840 -86156 ------- 76840 -73848 -------- 29920 -24616 --------- 53040 -49232 ---------- 38080 -36924 ----------- 1156
*November 8, 2010*

**calculus**

Go to site: calc101 com Click option derivates Then type x*cos[x] And clik option DO IT You will see solution STEP-BY-STEP
*November 8, 2010*

**Math **

a-lenght of two sides of triangle c- lenght of third side of triangle c=2a-4 Perimeter: P=a+a+c= 2a+(2a-4)= 2a+2a-4= = 4a-4 =4(a-1) P=16 4(a-1)=16 Divided with 4 a-1= 16/4 a-1= 4 a=4+1= 5 a=5 meters c=2a-4 = 2*5-4 = 10-4= 6 c=6 meters Perimeter=a+a+c=5+5+6=10+6= 16 meters
*November 7, 2010*

**math **

Correct OR 3*20=60
*November 6, 2010*

**math**

0.5*100%= 50%
*November 6, 2010*

**Math**

s=10 5s=5*s=5*10= 50
*November 5, 2010*

**math**

sqtr(1575^4)=1575^2=2480625 Becouse sqrt of fourth power is two
*November 5, 2010*

**calculus**

Go to calc101 com Click derivates and type x e^(-2x) with space betven x and e^(-2x) and click DO IT
*November 5, 2010*

**calculus**

In google type "library wolfram step by step derivate" then click for first term in list.
*November 5, 2010*

**Math**

5%=5/100=0.05 1000*(1+0.05)^19=1000*1.05^19= =1000*2.5269501953756382228051721572876 =2526.9501953756382228051721572876
*November 5, 2010*

**math**

2.59*100%=259%
*November 4, 2010*

**math**

(68*13)/100=8.84
*November 4, 2010*

**Math**

n ÷ d is n divide with d
*November 4, 2010*

**math**

0.7*100%=70%
*November 4, 2010*

**Algebra**

(x-4)^5(x^2-11)(x^2+49)=0 (x-4)^5*(x^4-11x^2+49x^2-539) =(x-4)^5*(x^4+38x^2-539) (x-4)^5* 5 degre (x^4+38x^2-539) 4 degre 5+4=9 Polynome have 9 degres and have 9 roots.
*November 4, 2010*

**7th grade**

Most important events in 1914 was Assassination in sarajevo and consequence of assassination WWI (World War I) Firs in google type assassination in sarajevo 1914 After you read some pages of that events in google type WWI and read abut that war.
*November 4, 2010*

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