Answer:
5-x
Step by step:
Let x be the missing blank
5-10+20-x+5(-2)
= 5-10+20-x-10
= 15-x-10
= 5-x
Answer:
b-14.99=40.01
Step-by-step explanation:
He used 14.99 dollars so you have to subtract that from the total.
Answer:

Step-by-step explanation:
The area of the swimming pool will be equal to
.
We know that the length is
and the width is
.
Therefore we can substitute those into the equation:

Then, we expand the brackets using a grid (attached).
After this, we collect like terms to find the final answer:

Our final answer is: 
Answer:
3x+2y+11
Step-by-step explanation:
I hope this helps
your welcome