Answer:
The length of the backboard is 105 cm.
Step-by-step explanation:
You can find the length be dividing area/width. The area is 18,900 cm squared. The width is 1.8 meters or 180 cm. 18,900/180 = 105 cm. You can check by multiplying length by width, if you get the area, then the answer is correct.
Step-by-step explanation:

The answers are in the photo!
5 + (n - 1)²
5 + (n - 1)(n - 1)
5 + (n² - n - n + 1)
5 + (n² - 2n + 1)
n² - 2n + 1 + 5
n² - 2n + 6 = 0
n = <u>-(-2) +/- √((-2)² - 4(1)(6))</u>
2(1)
n = <u>2 +/- √(4 - 24)</u>
2
n = <u>2 +/- √(-20)
</u> 2
n = <u>2 +/- 2i√(5)</u>
2
n = 1 <u>+</u> i√(5)
n = 1 + i√(5) n = 1 - i√(5)
The answer is equal to B.
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