Answer: 
Step-by-step explanation:
Given: Esther the Clown does face painting at the city carnival.
She paints 7 faces every 21 minutes.
So, the time taken by Esther to paint 1 Clown face =
If 'f' represents the number of faces and 'm' represents the number of minutes, then the total time spent to make 'f' clown faces is given by :-

4/9 - 2/3 = 4/9 - 6/9 = -2/9
Answer: <u><em>-2/9</em></u>
Just reverse search this on google
5 3/8 rounds to 5,
4 7/10 rounds to 5
Your estimated sum is 10
<span>2^x+4 -12=20
</span><span>2^x+4 = 20+12
</span><span>2^x+4 = 32
</span><span>2^x+4 = 2^5
x+4 = 5
x = 1
answer is </span><span>B. x=1</span>