True or false: the diagonals of a parallelogram intersect to form perpendicular lines

What value of x is in the solution set of –5x – 15 > 10 + 20x?

Answer this question! 30 points and brainliest!

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?