3[w-5]=[2w+10] thank you
2 answers:
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Answer:
[see below]
Step-by-step explanation:
Use the Pythagorean Theorem.
'c' will be the hypotenuse.
The hypotenuse is 15 cm. One of the legs is 5 cm.
14.1421356237 ≈ 14.1
The other leg should be about 14.1 cm.
Hope this helps.
The number of rows in the arena is 26
<h3>How to determine the number of rows?</h3>The hockey arena illustrates an arithmetic sequence, and it has the following parameters:
- First term, a = 220
- Sum of terms, Sn = 10920
- Common difference, d = 16
The number of rows (i.e. the number of terms) is calculated using:
So,we have:
Evaluate the terms and factors
Evaluate the like terms
21840 = n(424+ 16n)
Expand
21840 = 424n + 16n^2
Rewrite as:
16n^2 + 424n - 21840 = 0
Using a graphical tool, we have:
n = 26
Hence, the number of rows in the arena is 26
Read more about arithmetic sequence at:
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