Using the quadratic formula to solve 4x^2 – 3x + 9 = 2x + 1, what are the values of x?
a: 1+-sqrt159i/8
b: 5+-sqrt153i/8
c: 5+-sqrt103i/8
d: 1+-sqrt153i/8

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%

How can you check that you have correctly converted frequencies to relative frequencies?