What number needs added to the equation x^2+22x=9 to complete the square

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Can someone me with the property questions for 12 13 and 14 plz

Aline passes through 3,7 and 6,9 what equation represents the line