There are 20p coins and 10p coins on a desk in the ratio 1 : 6. If there are 10 more 10p coins than 20p coins, what is the value of 1 part in this ratio?

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

Evaluate cos2θ for cosθ = square root of 3/2

Aefg - almn. find the ratio of aefg to almn. a)1: 4 b)1: 2 c)2.1 d)4: 1