Answer:
The square root of x will be evaluated first before the addition of 5. Hence (-3)^2 = 9 and 9 +5 = 14, as per your teacher's answer, which is correct. The answer would not be -4.
Answer:
formula for area is length × height
so we have 13+8 ×16+4
21×20 = 420m
Answer:

Step-by-step explanation:
The Law of Cosines is given as:
.
Plugging in given values, we get:
.
You can use desmos! and to solve you find the point(s) where they overlap