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8c - 3c + 3 = 13
Begin by combining like terms:
5c + 3 = 13
Subtract 3 from both sides:
5c + 3 - 3 = 13 - 3
5c = 10
Divide both sides by 5:
5c/5 = 10/5
c = 2.
Answer:
z = 2.6
Step-by-step explanation:
<u>Use the formula for z-score</u>

This tells us that this person's score of 210 places them 2.6 standard deviations above the mean
Answer:
n = 39
Step-by-step explanation:
The base angles are congruent, that is
3n = 117 ( divide both sides by 3 )
n = 39
False. A two-column proof is also known as a "Statement-Reason Proof", with the statement column on the left and the reason column on the right.