What is the answer to

18 = -3y – 12

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?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1