3a^2+6b^3 a=3 and b=2

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r