Can someone help me pls

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?