Question

X varies directly with y. If x is 16 when y is 20, find x when y is 80.

Answer 1

32

Explanation:

16/20 reduces down to 2/5

set 2/5=x/80

cross multiply 160=5x

divide 32=x

check 2/5=32/80

32/80; 16/40; 8/20; 4/10; 2/5

yay 32 is the answer good luck :)