Answer:
option a is correct.
Step-by-step explanation:
We have given the equation:

Squaring both sides of the above equation we get:

After simplifying the first step



After final simplification we get:

We are getting quadratic equation since, the degree in resultant is 2.
Therefore, option a is correct.
The old rate of pay is x and the new rate is y then we have:
y = 2x + 7
Y = 21
PART 1: 21 = 2x+7
Subtract 7 from each side:
14 = 2x
Divide both sides by 2:
X = 14 / 2
X = 7
PART 2: The internship pays $7 per hour.
Answer:
B all real numbers greater than 0
First answer is correct because angles DAB and EAD equal 180 degrees (supplementary)
Answer: A, C, D
If you try plugging in a few different numbers into these equations, you will get only 1 result.
:)