1 hour and 30 minutes because when you subtract those you will get that answer
Answer:
B. 840
Step-by-step explanation:
21 is 70% of 30 and 70% of 1,200 is 840.
Answer:

Step-by-step explanation:
We can add the two equations to eliminate
and solve for
.



Now, we can find for
by using substitution:
(given)


Hope this helps :)
Answer:
9 Months
Step-by-step explanation:420 - 150 = 270
270/30 = 9