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Let a be the first term and d be the common difference

Then According to the question !!!!

a + 2d = 18 (1) a + 6d = 30 (2)from 1 and 2

4d = 12d = 3 Substitute it in 1

a + 6 = 18a = 12 so 17 term

a + 16d = 12 + 16×3 = 12 + 48 = 60

Nth term = a+ ( n-1 ) d( where a is the first term, n is the no. of termsand d is the difference between two consecutive terms . )

seventh term = a7 = 1/9 ninth term = a9 =1/7 a7 = a + 6d - ( 1 )a9= a+ 8d - ( 2 )by subtracting ( 1 ) from ( 2 ) (+ )a+ 8d = 1/7 ( +)( - )a+ 6d = 1/9 ( - )= 2d = 2 /63d = 1/63by putting value of d in eq. ( 2 )a + 8 ( 1/63 ) = 1/7a + 8/63 = 1/7a = 1/7 - 8/63a = 1/63

a 63 = a + 62d=1/63 + 62 ( 1 /63 )= 1/63 + 62/63= 1 ans.

Area needed to cover=l*b=(3×4)m^2=12m^2area of 1 square tile=side^2=(0.5×0.5)m^2=0.25m^2no. of square tiles required=12/0.25=48

Dimensions of the room :

Length ( l ) = 4.8 m ,

Breadth ( b ) = 3.6 m,

Height ( h ) = 2 m

i ) Area of the floor ( A1 ) = lb

= 4.8 m × 3.6 m

= 17.28 m² ---( 1 )

ii ) Area of four walls of the room ( A2 )

= 2( l + b )h

= 2( 4.8 + 3.6 )× 2

= 2 × 8.4 × 2

= 33.6 m² ----( 2 )

iii ) Total area of laying tiles = A1 + A2

= 17.28 m² + 33.6 m²

= 50.88 m²

It is given that cost of tiles

for 1m² = Rs 100

Cost laying tiles 50.88m² area

= 100 × 50.88

= Rs 5088

The position of each alphabet in the word is written but in the reverse order. Like the position of alphabets in the word BOWLER is 2, 15, 23, 12, 5, 18. So, the code is 1851223152.

a)(0,1,2,3)b)(0,1,2,3,5,6)

a) (0,1,2,3)b) (0,1,2,3,5,6)

(a) A={0, 1, 2, 3}, B={5, 6}; AXB={(0 5), ( 0, 6), (1, 5), (1, 6), (2, 5), (2, 6), (3, 5), (3, 6)}

A = { x : 2x + 3 = 11}

So, 2x + 3 = 11 when2x = 11-32x = 8x = 8/2x = 4

So A = { 4}

Thanks for helping me

c) only 3 ex- 2is greater than -2

X > Y is the right Or Only 3

only x will be greater than Y so option C is correct

the right answer is option c

option c. is the right answer

c)only (3) is the right answer

Option C only 3 because all positive numbers are greater than every negetive numbers

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Yaa thankz

we have to find frm end thn write the AP frm end

253,248,243,.......,3

For this AP a=253

d = 248-253 =-5

an=a+ (n-1)d

a10=253+(10-1)(-5)

a10=253+9(-5)

a10=253-45

a10=208

thanku very very much

B = {red, yellow,violet, green, blue, orange, dark blue}

the answer is 0 because the number 0 neither be negative and positive

i) 3/(-4) is a negitive rational number.

ii) -26/(-31) = 26/31 is positive rational

iii) -2/(-1) = 2/1 = 2 is positive rational

iv) -17/101 is a negitive rational number.

Thank you, u are right...

1 one2 zero3 positive4 positive

(1/2)³ in negitive power will be

2 raised to -3

Thanks

Given series is 3, 8, 13, ...... 253 here, first term , a = 3 common difference , d = 5 Let us find total number of terms at first.use => 253 = 3 + (n - 1)5 => 250 = 5(n - 1) => n - 1 = 50 => n = 51 so, there are 51 terms in given series.now we know, mth term from last =last term - mth term + 1 so, 20th term from last = 51 - 20 + 1 = 32 hence, 20th from last = 32th term from first T32=a+(32-1)duse , = 3 + 31 × 5 = 3 + 155 = 158

hence , 20th term from last = 158

The cost of 23 televisions= 570055So,The cost of each television=570055÷23= 24785

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प्रतिशत त्रुटि होगी= 5x/4-4x/5/(4/5)= 9x/20*5/4*100=56.25percent

the reciprocal of a negative rational number is always a negative rational number itself.for example, reciprocal of -9 is 1/-9

negative no. is the correct answer

After reading 3/8 of the book, the remaining fraction 1 - 3/8 = 5/8The boy then reads 4/5 of 5/8 = 4/5 x 5/8 = 1/2

Total fraction read = 3/8 + 1/2 = 7/8The unread fraction = 1 - 7/8 = 1/8 This is equivalent to 30 pages∴ The book has 30 ÷ 1/8 = 240 pages

tq

History is the study of past

History is the understanding for our past history

history is a historien

history is study of past

history is a study of our past life .it tells us how humans are lived .

History is the understanding for past

In 2 nd and 3 rd quadrant abssica is negitive

1

2

3