13. Determine the sum of the series 3+7+ 11 +15 + ... (4n-1)?
1 answer:
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Answer:
21) x = 0
23) x = 7
Step-by-step explanation:
In a parallelogram, the opposite sides are congruent. Using this fact, we can create equations for both problems.
21)
Subtract 18.
Divide by 2.
23)
Add 3.
Divide by 2.