Answer:
105 snacks
Step-by-step explanation:
$330=45 drinks at $1.50 and x snacks at $2.50.
330=45(1.50)+2.50x
330=67.5+2.5x
2.5x=262.5
x=105 snacks
3
a
The simplified form of r^-7 + s^-12 is ----> 1/r^7 + 1/s^12