The answer is D
U would subtract a^2 then square both sides to isolate the variable
Answer:
the index of 2 is -1
Step-by-step explanation:

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Well you can check what type of angle it is! like depending on how it is slouched like a right angle is 90° for example.
Something that you should remember is that the sum of the angles of a triangle add up to 180°.
Since we are given 100° and that the other two angles are equal, we can set up an equation like this:
, where x is the 2 angles.
Doing the math, the measure of each unknown angles is 40°.
Answer:
[0, infinity)
Step-by-step explanation:
A square root can only use positive numbers, otherwise it becomes imaginary. A function needs to be real to output real values. Therefore, the domain is everything from 0 onwards.