How do I solved this problem
7+9×3-1=25

Me find the missing dimension of a triangle height: 7 in., area: 21^2

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

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°