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steven122048i
29.09.2019 •
Mathematics
What is (x-3)-5=13 when you're solving for x?
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Ответ:
x - 3 - 5 = 13 When the sign crosses over the equality sign, it changes
x = 13 + 3 + 5
x = 21
I hope this helps.
Ответ:
181.7m
Step-by-step explanation:
The set up is a right angled triangle with;
Height of the light house = 25m = opposite side
The distance of the boat from the base = 180m = Adjacent
The distance of the light beam from the house = Hypotenuse = x
Using pythagoras theorem;
x² = 25²+180²
x² = 625+32400
x² = 33025
x = √33,025
x = 181.7m
Hence distance of the light beam from the top of the lighthouse to the ground is 181.7m to the nearest tenth