Question

F (x) = x +5 x +6 F= ( -4/5 ) (49/4) (20)

Answer 1

f(x) = x+5x+6
f(-4/5)= -4/5+5.(-4/5)+6
= -4/5-20/5+6
=-4/5-4+6
=-4/5+2
=-4/5+10/5
=6/5

f(49/4) = 49/4+5(49/4)+6
= 49/4+245/4+6
= 49/4+245/4+24/4
=318/4
=159/2

f(20)= 20+5.20+6
= 20+100+6
=126