Please help me please please please

Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?