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angle AOC=50°therefore,angle DOB=50°. (By vertically opposite angle)also angle COB= angle AODthere fore let x the required anglenow x+x+50+50=360. (complete angle is 360°)x=130°therefore angle COB and AOD=x then the sum of angles is 260° (answer)

Given 9 × 4²

We will do factorization,

3² × 4²

( 12)²

i) option is correct

The equation simplifies as a^2-8ab-5 +3ab-4a^2+8 =(1-4)a^2+(-8+3)ab+(-5+8)=-3a^2-5ab+3

सिक्के का आयतन पानी में हुई वृद्धि के बराबर होगा

haa vahid hoga .2 sami panic hi aayan hoga kunki jitna USA bhaar hoga tuna pani pani chakaa ga na

Don't copy paste idiot....the solution is wrong anyway

The degree of a polynomial is the highest degree of its monomials with non-zero coefficients. The degree of a term is the sum of the exponents of the variables that appear in it, and thus is a non-negative integer.(i) 4m - sqrt(5) Degree = 1

(ii) m^9 - m^4 + m^12 + m - 7 Degree = 12

(iii) 7p^2q^3t - 11p^4t + 2p^2q^6Degree = 8

(iv) ab^2cd - 3a^2bcd^3 + 2ac^4Degree = 7

solve second no questions

we can first find the HCF of 12x and 3012x = 2*2*3*x30 = 2*3*5HCF = 612x - 30 = 6 ( 2x - 30 ) ANS..

2a-4=a-10 a=-6 The value of a is -6.

thank you

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i) ABC is a triangle, in which AC > AB; this is only for the inference that the altitude

from A on to BC lies towards B, that is point 'E' lies between B and D; this is the most

important inference for proving the given

ii) D is the midpoint of BC

iii) AE perpendicular BC

Required to prove: AB^2=AD^2-BC*DE+1/4BC^2

PROOF: [for easy convenience, let me denote all squares by * and multiplication by 'x']

1) Since AE is perpendicular to BC, ABE is a right triangle with angle E = 90 deg.

2) Hence applying Pythagoras theorem we have, AB* = AE* + BE*

3) In similar way from the right triangle, ADE, AD* = AE* + DE*, => AE* = AD* - DE*

4) Substituting for AE* from step 3 in step 2, we have,

AB* = AD* - DE* + BE*

5) From the figure (Kindly make according to the description given in data),

BE = BD - DE

6) Substituting this in (4), AB* = AD* - DE* + (BD-DE)*

7) Expanding, AB* = AD* - DE* + BD* + DE* - 2 x BD x DE

8) Cancelling -DE* and +DE* and substituting BD = (1/2)BC

{Since, D is mid point of BC}

we get, AB* = AD* + (1/4)BC* - BC x DE

Thus it is proved that "AB^2=AD^2-BC*DE+(1/4)BC^2"

Now, BD = BC/2(since, D is midpoint)

Therefore,

AB2= AD2+ BD2-2BD*ED

=AD2+ (BC/2)2– 2(BC/2)*ED

= AD2+ (BC/2)2–2(BC/2)*ED

= AD2– BC*DE + ¼ BC2

In triangle ADB &ADCBD=CD(given) AD=AD(common) angle ADB=angle ADC(90°each) - By SAS criteria triangle ADC congruent to triangle ADB.By CPCT AB=AC

Therefore, Triangle ABC is isosceles triangle.

4x²-16x+16 = 0=> x²-4x+4 = 0=> x²-2x-2x+4=0=> x(x-2) -2(x-2) = 0=> (x-2)(x-2) = 0=> x = 2,2

5a-{a^2-{2a(1-a+4a^2)-3a(a^2-5a-3)))-8a5a-(a^2-2a+2a^2-8a^3)-3a^3+15a^2+9a)))-8a5a-3a^2+2a+8a^3-3a^3-15a^2-9a-8a5a^3-18a^2-10a

5a × 3a^2 × 7a^4 = 105 a^7

Multiply the numbers and the powers are added.

(x-7)(x-9) = 195x^2 - 9x - 7x + 63 = 195x^2 - 16x - 132 = 0x^2 - 22x + 6x - 132 = 0x(x - 22) + 6(x - 22)=0(x+6)(x-22)=0x = - 6, 22 ans

Sum = (8x-6y+4)+(6y-3x+7)= 5x+11Difference = (5x+11)-(4+9y+2x)= 3x - 9y + 7

y = sin(x³)

dy d(sin(x³))---- = ---------------dx dx

cos(x³) d(x³)/dx

3x²cos(x³)

Add : (9a - 3b) + (6a - 10b)= (9+6)a + (-3 - 10)b= (15a - 13b) ans

a ki aa yaar samaj nahi aa rahi ki aaa

(3x+12)+(2x-32)=1805x-20=1805x=200x=40D=BD=2x-32=80-32=48

No Humans. Haveyou everwondered what aworld without trees wouldlook like? Close your eyes, and try toimaginea desolateEarth. ... Even if our species survived the devastation of deforestation, life asweknow itwouldbe very different from now in 2011, where only half of theworld'sforests

No. No trees....No humans. ..Life could not exist on Earth without treesbecause they produce most of the oxygen that humans and wildlife breathe. Trees absorb carbon dioxide from the atmosphere and release oxygen using the process of photosynthesis. ... Forests act as giant air filters for the world.

No we cannot imagine without trees. because Life could not exist on Earth without treesbecause they produce most of the oxygen that humans and wildlife breathe. Trees absorb carbon dioxide from the atmosphere and release oxygen using the process of photosynthesis. ... Forests act as giant air filters for the world.

=sum of first 8 multiples of =3=3+6+9+12+15+18+21+24=3(1+2+3+4+5+6+7+8)=summation of natural no's==n(n+1)/2=8(8+1)/2=8(9)/2=36sum of first 8multiples of 3=3(36)=108

3+6+9+12+15+18+21+24=108

It will make a series having first term, a=3 and common difference, d=3Then we will apply formula of A.PSum of first 8 multiples of A.P={2a+(n-1) d}×n/2={2×3+7×3}×8/2=27×4=108

The first-8 multiples of 3 are 3,6,9,12,15,18,21 and 24these numbers are now in Arithmetic progressionsofirst term, a=3common difference,d=6-3=3number of terms,n=8Therefore Sum of AP=n/2[2a+(n-1)d]=8/2[2(3)+(8-1)3]=4[6+(7)3]=4(6+21)=4x27=108

a=3, d= 3sum = n/2{2a+(n-1)d} =8/2{2×3+(8-1)×3} = 4(6+21) = 27×4 = 108

108 is the best answer