What 1/3x+9=21 answer?
2 answers:
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Answer:
Step-by-step explanation:
Notice that is a right triangle where its hypotenuse is
. We can also see that
. For this we must use the Pythagorean Theorem.
Recall:
The Pythagorean Theorem states that if you have a right triangle, the principal square root of the sum of the squares of each leg is the length the hypotenuse.
We can see that and
Your answer is (a) because 4 times 2 is 8 but since it's negative 2 it's negative 8
