Write an equation of the line with a slope of 3 and a y-intercept of 4.5

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

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 is the solution to the equation 9^(x+1) =27