Which expression is equivalent to (-7.5+21 1/4)+(-1/2)

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?

How many solutions does the nonlinear system of equations graphed below have?

What’s the answer ? use the picture to see the problem