is interest per 1 year? if so:
interest per year=9%×1000
=90
interest for .5 years=90÷2
=45
1000+90+45=1135
Ans: 1135
Step-by-step explanation:
Amount of water left = 250 - 9x.
Answer:
sum
Step-by-step explanation:
Short method: multiply constants

Long mothod: expand it

Answer: 42
Written out, this would be (x / 7) - 10 < -6
solved, it would be x < 28