If CE=20, find the value of x

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000