Question

If a value is inversely as b + 2 and if a is equals to 8 when we is 1.5 find a when b is equals to 5

Answer 1

Answer:

  ∴ a = 4

Step-by-step explanation:

Given,

A inversely of b+2

i.e,  $a = \frac{K}{b+2}$

If  a = 8  and  b = 1.5

Then,

    $K = a ( b + 2 )$

⇒  K = 8 ( 1.5 + 2 )

⇒  K = 8 × 3.5

∴  K = 28

Now,

If  b = 5

then,

      $a = \frac{K}{b+2}$

⇒  $a = \frac{28}{5+2}$

⇒ $a = \frac{28}{7}$

  ∴ a = 4