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Dmitry [639]
3 years ago
9

How to solve y for this problem

Mathematics
1 answer:
schepotkina [342]3 years ago
8 0
We can use the law of sines to solve this...

sin30 / 4.38 = sin2 / y          (multiply both sides by y)
ysin30 / 4.38 = sin2            (multiply both sides by 4.38)
ysin30 = 4.38sin2                (divide both sides by sin30)
y = 4.38sin2 / sin30
y = .305719                      (change to degrees)
y = 18°
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adelina 88 [10]

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Distance he covers in \frac{3}{4} of an hour = 7\frac{1}{20} miles.

Step-by-step explanation:

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Solution:

Speed at which Phillip rides = 9\frac{2}{5} miles per hour

Time for which he cycles = \frac{3}{4} of an hour

Distance covered in miles =Speed\times Time = 9\frac{2}{5} \times \frac{3}{4}

To multiply mixed numbers we need to convert them to fractions.

[A\frac{b}{c}=\frac{Ac+b}{c}]

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⇒\frac{141}{20}

Then we convert back to mixed fraction by dividing numerator by denominator and writing the quotient as whole number with fraction (remainder as numerator and denominator being the divisor)

⇒ 7\frac{1}{20} miles.

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