Question

Hi MATES. PLEASE CAN U ALL HELP ME IN SOLVING IT?

Answer 1

21/2 -9/4
= (42- 9)/4
= 33/4
= 8 1/4

Answer 2

Here you go!!

Mary's position in the lake with respest to the lake's surface => Total height - height of the dock.

= 10(2)+1 / 2 - 4(2)+1 / 4

= 21 / 2 - 9 / 4

= 42-9 / 4

= 33 / 4

Therefore the mixed fraction is 4& 5/7 which is equal to 33/7.

Hope is useful!