Ethan was surveying his field and saw some cows and ducks. Ethan counted a total of 74 heads and 258 legs. Assuming there are no mutations in the animals, determine exactly how many ducks and cows he saw.
Let X represent the number of ducks and y represent the cows.
Total Equation:
2 + y = 74
Legs Equation:
2x + 4y= 258
How many ducks?
How many cows?

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.

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

Which function has the domain x> -11?