Answer:
The answer is -7
Step-by-step explanation:
I took the test! Hope this helps <3
You can work it out by using trial and error
so you get
x=3 , y=2
Answer: 
<u>Simplify both sides of the equation</u>

<u>Subtract 5n from both sides</u>

<u>Subtract 15 from both sides</u>

17% are lions, 3/10 = 30% are zebras, therefore the remaining 100 - 47 = 53% of animals are tigers.
36.89 total divided by the 8.6 gallons he bought = 4.2 so the price per gallon would be $4.20