Not sure how to solve :

in below diagram, line bc is parallel to de.
i. e. bc∥de
∠abc = 47°∠cab = 105°
find ∠cae.

Which value of c would make he following expression completely factored? 8x+cy

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?