Question 715694
You are stacking too many different questions into one request for help but I will help with #2.


#2a mixture of candy is made to sell 89 cents per pound. If 32 pounds of candy, selling for 80 cents per pound, are used along with 12 pounds of more expensive candy, find the price per pound of the better candy?


Available candies are 32 pounds for 80cents per pound and 12 pounds at unknown price.  Wanted is mixture for 89 cents per pound.

Let e = price per pound of the expensive candy.


{{{(32*80+12*e)/(32+12)=89}}}
The left side is in cents per pound and the right side is also cents per pound.
Solve for e, price of the expensive candy to use in the mixture.


A little advice on #4,
Find 8% of 10000.  That would likely be for one year.  What is the difference between this and the $3500?