Question

Answer of 3question fast

Answer 1

Step-by-step explanation:

10. x => 0.322222

10x=>3.22222...(1)

100x => 32.22222...(2)

Subtract (1) from (2) =>(100-10)x = 32.2222-3.2222 => 90x =29 =>x = 29/90. Answer is option(b).

11. 0.23232323 +0.22222222 => 0.45454545 = x

So answer is option(a).

12. (a) 39/24=>13/8 =>1.625

(b)3/16 =>0.1875

(c)3/11 =>0.27272727...

(d) 137/25 =>5.48

answer is option(c).

13. a/b +b/a = -1 =>

$\frac{{a}^{2} + {b}^{2}}{ab} = - 1=> {a}^{2} + {b}^{2} = - ab = >$

${a}^{2} + {b}^{2} + ab = 0$

${a}^{3} - {b}^{3} = (a - b)( a^{2} + {b}^{2} + ab) =$

$(a - b)0 = 0$

answer is option (d).

14. Volume of a cuboid =>

$3 {x}^{2} - 27 = 3( {x}^{2} - 9) =$

$3( x + 3)(x - 3)$

So the possible dimensions can only be option(b). Answer is option(b). Hope it helps you.