Question

please answer these questions ​

Answer 1

1. To find the pair of Integers whose product is -8 we will check each option :-

a) (2,4) :- 2×4 = 8

b) (4,-2) :- 4×(-2) = -8

c) (-4,-2) :- (-4)×(-2) = 8

d) (-8,0) :- -8×0= 0

Clearly option b is correct.

2. Reciprocal means multiplicative inverse. When a number is multiplied to it's multiplicative inverse then the product is always one.

let x be reciprocal of 1/9

therefore , x × 1/9 = 1

⟹ x = 9

Therefore , reciprocal of 1/9 = 9

So, option b is correct.

3. 0.3 × 0.5 = 3/10 × 5/10

⟹ 3/10 × 5/10

⟹ 15/100

⟹ 0.15

Option b is correct.