Question

Calculate the value of the subject in each of the following. Do not use a calculator

(a) A= πr2, when π=22/7 and r = 3.5
(b) a=3-7b/ b+11, when b= 5
(c) v= √u^2+2as, when q= 7 and r =12

Answer 1

a=38.5

Explanation:

a=22/7*3.5*3.5

a=22*0.5*3.5

a=22*1.75

a=38.5

b=-2

3-7(5)/5+11

3-35/16

-32/16

b=2