Answer:
We know the triangle in a right triangle because of the pythagoras theorem: 5^2+12^2=13^2
25 + 144 equals 169, making it a right triangle since the equation works.
Step-by-step explanation:
I tried to explain this the best i could, hope it works :)
15
It's 19.
Use order of operations (PEMDAS):
2^2[4+(3-6)^2]-13
Parentheses first:
= 2^2[4 + (-2)^2] - 13
= 2^2 ( 4 + 4) - 13
= 2^2 * 8 - 13
Now work out the exponent:
= 4*8 - 13
Now the multiplication:
= 32 - 13
= 19.
