n=# of nickels
q=# of quarters
$12 is 1200 cents
5n+25q=1200
n=q
substitute q for n or n for q
5q+25q=1200
30q=1200
q=1200/30
q=40 quarters and therefore n=40 nickels
40 quarters is $10 and 40 nickels is $2, therefore you have $12
Hope this helps.
its A because 3 plus 6 is 9 and they're both negitive. you then leave the 3x^2 and leave the x/2 both still posivive
So there are 120 minutes in 2 hours. That would mean that there are 60 minutes in 1 hour (you can divide by 2)
So since 1 hour is 60 minutes, then 15 hours would be 900 minutes (you do 60 times 15)
Does this help? :)
Answer:
x ≤ 30
Step-by-step explanation:
≤ is less than or equal to which means it is less than or is 30 but no greater than 30 hence the "at most"
