which ratios can make a proportion. 3/5 and 9/25. 4/10 and 10/25. 4/11 and 6/13. 4/9 and 9/4

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

Add the fractions and simplify 1/2+ 1/3

Given that abcd is a rhombus, what is the value of x?