15/4 plus - 4 1/3 write as a fraction simplest form

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries