It can use bikes more often or carpool rather then using cars all the time this will help reduce toxic chemicals in the air.
Answer:
$100
Step-by-step explanation
You just add 77 and 23 which is 100. Therefore she gave the cashier 100 dollars.
I think it is B not so sure but yea i think B sorry if I'm wrong
Answer:
x^2-1^2
Step-by-step explanation:
formula:
(a-b)(a+b)=a^2-b^2
