Five pencils and four pens cost $6.15. three similar pencils and eight owns cost $9.85. how much would you expect to pay for a set of eight pencils and seven pens?

Jonathan puts $400 in a bank account. each year the account earns 6% simple interest. how much interest will be earned in 5 years?

The slope of the line passing through the points (2, 7) and (-4, 8) is

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 less than 132. the probability that a randomly selected adult has an iq less than 132 is?