Answer:
20.7 --> 21
9.18 --> 9
21x9 is 189, thus the estimated product is 189.
Let me know if this helps!
Answer:
It's the second option -> y = 1/2x -1

The difference is the result of a subtraction problem.
We are given two values that are being subtracted: 54 and a number, represented by 
So, represent this mathematically with
.
Answer:
4 is the median to your problem
Step-by-step explanation:
=9x+2(2x+3)
=9x+4x+6
=13x+6 I hope so,