What is −2√20 − √125 in simplest radical form?

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

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.