48.1+29.7+11.8 Sum Front-End Estimation?

Assume that a population of 50 individuals has the following numbers of genotypes for a gene with two alleles, b and b: bb = 30, bb = 10, and bb = 10. calculate the frequencies of the two alleles in the population’s gene pool.

What are “like terms”? why can we only add like terms?

Give me the equations of two lines that have the same slope but are not parallel.