Factor the expression. c2 + 10c + 25 a. (c + 5)2 b. (c – 5)2 c. (c + 5)(c – 5)

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

How can you find the conditional probability of a given b as the fraction of b’s outcomes that also belong to a, and interpret the answer in terms of the model? i just need a good explanation

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