If $x+y=4$ and $x^2+y^2=8$, find $x^3+y^3$.

16

Step-by-step explanation:

We are given .

If we square both sides we obtain .

Recall .

So we have .

Reorder this so we can use the second given: .

Subtract 8 on both sides:

Divide both sides by 2:

So we have the following so far:

We are asked to find .

We will now cube both sides of the first given:

Expand left hand side:

Factor and reorder:

Plug in values given and the value we found for :

Simplify third term of left hand side:

Subtract 48 on both  sides:

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.

its the second choice.

step-by-step explanation:

the elements in the range will be 7 less than the elements in the domain.