Emma runs a farm stand that sells apples and blueberries. Each pound of apples sells for $3 and each pound of blueberries sells for $1.25. Emma made $58.50 from selling a total of 30 pounds of apples and blueberries. Write a system of equations that could be used to determine the number of pounds of apples sold and the number of pounds of blueberries sold. Define the variables that you use to write the system.

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.