Answer:

Step-by-step explanation:
we know that
To find the area of the backyard that is not covered by the hot tub and fire pit subtract the area of the hot tub and the area of the fire pit from the total area of the square backyard
so

Which ever expression is 3x + 21 + 10 ..... 21 + 10 = 31 .... So it'll be 3x + 31 .
Answer:
520
Step-by-step explanation:
must be the answer..
Answer:
Sure why not.
Step-by-step explanation: