Is this equation true, false, or open 4y+8=6y+3

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

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 is the y intercept of f(x)=(1/2)^x?