Is 3x^2 + x^2 equal to a) 3x^4 b) 4x^2 (^2 means to the second power ) (^4 means to the fourth power)

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?

If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?

A. 120 degrees b. 90 degrees c. 30 degrees d. 60 degrees