Wednesday
July 30, 2014

Posts by Bosnian


Total # Posts: 1,682

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

math
8.7

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

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

art
Go to images.google com and type scgraffito any you can see some examples.

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)

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

math
x+9-6=7 x+3=7 x=7-3 x=4

MAth
If your solution x=315 you solve it correctly.

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.

math
liter is unit of volume not of force

math
1cm=(1/100)m 1m=100cm 100m=100*100=10000cm

MATH
-7+2=-5 |-5|=5 |-4|=4 5-4=1

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.

Aims math [help please very appreciated]
15x-2x=21-4 13x=17 Divide wit 13 x=17/13

5th math
(1/4)*(2/2)=2/8 (1/4)=(2/8) (1/4)+(1/8)= (2/8)+(1/8) =3/8

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^2-1...

math
sqroot(5*1215)=sqroot(6075)=77.9423

Math
2/3=0.66666666 7/11=0.6363636 Larger is 0.67

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

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

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

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(...

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.

Math
71%=71/100=0.71 510*0.71=362.1 million square kilometers

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=11.4521...

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...

math
33=3*11 65=5*13 33/65=(3*11)/(5*13)

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

math
C=d*pi= 200*pi= 200*3.14= 628 meters

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...

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)...

6th grade Math
11-7=4 4/11 not red

Math
s=v^1/3=third root(v) s=third root(729)=9

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

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)...

Algebra
z-5-7(z-3)+3(5z+1)=z-5-7z+21+15z+3 =9z+19

math
50/20=2.5lb

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$

algebra
5a+7a^2+3a= 8a+7a^2= a(8+7a)

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

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

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)

Math
24=2^3*3

Math
3*4*2*(x^2*x*x^3)=24x^6

math
1000/10=100 tens in 1000 6000/100=60 hundreds in 6000 2000000/1000=2000 thousands in 2000000

8th grade math
100%-93.2% = 6.8%

math
1.035^20.148791684000665883041124279516 =2 2*1000=2000

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)=20.1487916840006658830411242...

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)

math
34/123.08 3400:12308=0.276243 34000 -24616 ------- 93840 -86156 ------- 76840 -73848 -------- 29920 -24616 --------- 53040 -49232 ---------- 38080 -36924 ----------- 1156

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

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

math
Correct OR 3*20=60

math
0.5*100%= 50%

Math
s=10 5s=5*s=5*10= 50

math
sqtr(1575^4)=1575^2=2480625 Becouse sqrt of fourth power is two

calculus
Go to calc101 com Click derivates and type x e^(-2x) with space betven x and e^(-2x) and click DO IT

calculus
In google type "library wolfram step by step derivate" then click for first term in list.

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

math
2.59*100%=259%

math
(68*13)/100=8.84

Math
n ÷ d is n divide with d

math
0.7*100%=70%

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.

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.

math grade 11
Slope of any function is first derivate of that function. Quadratic function in your case have first dervate: 3*2*x+4=6*x+4 Linear function in your case have first dervate: m Line will be tangent of quadratic parabola when first derivates is egual. m=6*x+4 m*x-5=(6*x+4)*x-5=6*...

math
1 yard= 3 feet 29029/3=9676.333yard

Math
8/4=2 12/6=2 Area of first rectacangle: A1=4*6=24 Area of second rectacangle: A2=8*12=96 96/24=4 Scale for dimensions 2 Scale for areas 4

Math
y-intercept f(0)=9*0-0^3=0-0=0 x-intercept 9x-x^3=x*(9-x^2)=0 First solution is x=0 Next solution 9-x^2=0 x^2=9 x=+/- sqroot(9)=+/-3 You have 3 solutions x1=0 X2=-3 x3=3

math
Perimeer of recatacalgle: P=2*a+2*b P=2*(a+b) Perimeter is 16ft 16=2*(a+b) Divided with 2 8=a+b a+b=8 You mas fid numbers a and b which have sum 8. That is a=1 and b=7 a=2 and b=3 a=3 and b=5 a=4 and b=4

Math
Diagonal: d=sqroot(a^2+a^2) d=sqroot(2*a^2) d=sqroot(2)*a a=15cm d=1.41421*15 Becouse sqroot(2)=1.41421 d=21.21315 cm

Math
You also multiply that on this way: 3.0*.25 60 150 ---- .750 3.0 have 1 decimal place .25 have 2 decimal places Total numbers of decimal places is 1+2=3 Thats why you must deduct 3 decimal places in this case. 3.0*.25 =0.750 =0.75

Math
3*0.25 6 15 ---- .75 You must deducut 2 decimal places becouse 0.25 have 2 decimales. 3*0.25=0.75

Math
326^2=106276 106276=2*a*0.83 Divided with 0.83 (106276/.83)=2*a 2*a=128043,3735 Divided with 2 a=64021,68675

math
(2h-6)=2*(h-3)

Math
3!=6 3!+(6*5)-(5+0)= 31 6+30-5=36-5=31

Math
3*n-24=12+2*n 3*n-2*n=12+24 n=36

math
30° One example of circle divided into 12 equal parts is watch. Watch have 360°divided into 12 equal parts.

MATH
(24*7)/8= 168/8= 21

Math
A=(1/2)*b*h A=(b*h)/2 Multiple with 2 2*A=b*h Divided with h (2*A)/h= b b=2A/h

math
Also in google type "wikipedia quadratic equation" In this case when Discriminant is negative equation have two distinct complex roots.

math
Discriminant is: Ä=b^2-4*a*c In this case: a=-3 b=-4 c=-3 Ä=(-4)^2-4*(-3)*(-3) =16-4*9 =16-36 =-20 Go to en wikipedia and type "Discriminant" Heare you have all about Discriminant

Math
For more information in google type "wikipedia arithmetic progression"

sports math
20=3+3+3+11 20=3+3+5+9 20=3+3+5+7 20=3+3+7+7

Math
a=leght of side of original square b=leght of side of new square b=a+7 a=b-7 Area of new square is: A=b^2=121 b=sqroot(121)=11 a=b-7=11-7=4 Length of a side of the original square is 4

math
One of angle in right angle triangle is 90° Other two angles is x+17 Sum of angles in triangle is 180°. Thats mean: 90°+2*(x+17)=180° 2*(x+17)=180°-90°=90° 2*(x+17)=90° Divided with 2 x+17=(90°/2)=45° , x+17=45° x=45-17=28° x=28&...

ALgebra
a-b=7 , a=7+b a+b=25 (7+b)+b=25 (Becouse a=7+b) 7+2b=25 2b=25-7 2b=18 Divided with b=(18/2)=9 a=7+b=7+9=16 a=16 , b=9 a-b=16-9=7 a+b=16+9=25

basic math
27%=(27/100) 27%*500=(27/100)*500 =(27*500)/100 =27*5=135 Correct answer

algebra
48=6*8 56=7*8 (48/56)=(6*8)/(7*8)=6/7

Math
y=a*x^2+b*x+c 3*x^2+2*x+6=10 3*x^2+2*x+6=10 3*x^2+2*x+6-10=0 3*x^2+2*x-4=0 a=3 , b=2 , c=-4 x1=(-b-sqroot(b^2-4*a*c))/(2*a) x1=(-2-sqroot(2^2-4*3*(-4)/(2*3) =(-2-sqroot(4+48)/6 =(-2-sqroot(52))/6= =(-2-sqroot(4*13))/6 =(-2-2*sqroot(13))/6 =(-2/6)*((1+sqroot(13)) =(-1/3)*(1+3.6...

math
(4/3)=(b/21) Multiply with 21 21*(4/3)=b b=(21*4)/3 b=(84/3) b=28 28=4*7 21=3*7 (28/21)=(4*7)/(3*7)=(4/3)

math
3x^2-5*x+1=a*(x^2+2*b*x+b^2)+c Becouse): (x+b)^2=x^2+2*b*x+b^2 3x^2-5*x+1=a*x^2+2*a*b*x+a*b^2+c 3x^2-5*x+1= =a*x^2+(2*a*b)*x+(a*b^2+c) a*x^2=3*x^2 Divide with x^2 a=3 (2*a*b)*x=-5x Divide with x 2*a*b=-5 2*3*b=-5 6b=-5 Divide with 6 b=(-5/6) a*b^2+c=1 3*(-5/6)^2+c=1 (3*25/36)+...

math
When: y=a*x^2+b*x+c Then Discriminant is: Ä=b^2-4*a*c Go to en.wikipedia organd type "Dioscriminant"

Calculus
ln(1/x)= ln(1)-ln(x) ln(1))=0 ln(1)-ln(x)=0-ln(x)= -ln(x) ln(1/x)=-ln(x)

calculus
V-Volume V=20 V=L^2*h L^2*h=20 Divide with (L^2) h=20/(L^2) Area of square is L^2 Areao of rectacangle L*h Total price=2*Area of square*(2$)+4*Area of rectacangle*(3$) P-Price P=2*(L^2)*2+4*L*h*3 =4*L^2+12*L*20/(L^2) =4*L^2+240*L/(L^2) =4*L^2+240/L (dP/dL)=4*2*L+240*(-1)/(L^2)...

math
7-side polygon is heptagon or septagon. Go to wikipedia and type "heptagon" On en.wikipedia you have all about heptagon. Area is: A=3.633912444*a^2 a is side lenght Area of smaller heptagon is: A1=3.633912444*(a1)^2 a1 lenght side of smaller polygon Larger side lengh...

math
Sometimes you easy find formulas for homeworks probles.Just in wikipedia type what you need. In this case type sphare and you will have all about spare. Sometime use wikipedija.

math
x^2-3x-4-x^2-11x=24+4 -14x=28 Divided with -14 x=28/(-14)=-2

Calculus
Proof that is minimum. Function have minimum if (dy/dx)=0 and (d^2y/dx^2)>0 If second derivate greater than zero. Second derivate is derivate of first derivate. In this case: (d^2y/dx^2)=d(2x)/dx=2>0 That is minimum

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