Need help with these two problems! 1. use the associative, commutative, and distribute properties to prove the expression 7(3y-5) -2(10+4y) is equivalent to the expression 13y-55.
2. prove algebraically that each expression has the same value by evaluating each expression for y=5, 7(3y-5) -2(10+4y), 13y-55.

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.