Question

Find the value of:
$2x + 1$
when x = 2
ii)
$5x - 2y$
when x = -1 and y= -3
$3pq + 4qr + rs$
when p = -1 , q = 2 , r = -2 and s= 1

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Answer 1

Answer:

I) 2*2+1=5

ii) 5*-1-2*-3

=-5+6

= 1

iii) 3*-1*2 + 4*2*-2 + -2*1

= -6-16-2

= -24