Answer:
81
Step-by-step explanation:




Answer:
2x +21
Step-by-step explanation:

1 yard=3 feet
4yards= 4•3= 12 feet
Perimeter of a square = 4•side = 12 so side of the square is 3 feet
Area of square = 3•3=9 Square feet
Answer:
J (7, 10)
K (3, 2)
Formula for midpoint:
x - coordinate for M:
y - coordinate for M:
Therefore, M (5,6).
Hope this helps :)
Step-by-step explanation:
The three numbers are 23, 161, and 123.