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Ann [662]
3 years ago
5

3. Collin bought 3 cookies and 5 doughnuts for $12.50. Dana bought I cookie and I doughnut for $3.00. How much is a cookie? a do

ughnut?​
Mathematics
1 answer:
katrin [286]3 years ago
3 0

Answer:

$1.50

Step-by-step explanation:

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Step-by-step explanation:

* Lets describe the figure

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∵ LJ is opposite to angle K

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* Lets revise how to find the trigonometry function

# sin Ф = opposite/hypotenuse

# cos Ф = adjacent/hypotenuse

# tan Ф = opposite/adjacent

∵ LK is the opposite side to angle J

∵ LJ is the hypotenuse

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∴ cos(L) = 127.58/219 = 0.583

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