The mean of 20 items is 40 and the mean of another 30 items is 60. What is the mean of
de angles of
whole set of items?​

Which value is not a solution of 8x^3 – 1 = 0

Which of the following statement about pascal's triangle are true?

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?