Just plug in 3 into the formula that you have been given and solve the equation.
Answer:
-1(7+3)
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
The first choice is true.
The second is not true.
Third is true.
I think the last is true (not sure)
Answer:

Step-by-step explanation:
a^2+b^2=c^2
5^2+b^2=16^2
25+b^2=256
b^2=231
b=