40 because if you add 1 to each other those sides so you do 9+9 and 11+11 which equals 40 for your perimeter

Standard form:

Since the exponent of the scientific notation is negative −14, move the decimal point 14 places to the left. 0.00000000000006359.
Step-by-step explanation:
9 + y^2 = 49
y^2 = 40
y = √40 = 2√10
4.5/3 = 2√10/5x
22.5x = (3) 2√10
22.5x = 6√10
x = 6√10/22.5 = 3√10/11.5
Answer:
Step-by-step explanation: