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anzhelika [568]
3 years ago
11

Marina volunteers at the salvation army. she has been tasked with buying non-perishable items for families that were displaced b

y a recent flood. she finds a company willing to sell her cans of food at a discounted price. in the system below x represents the number of small cans she purchased and y represents the number of large cans she purchased.
2.25x+4.75y=714.75
x+y=181

part c: how many small cans did marina purchase
part d:how many large cans did marina purchase
Mathematics
1 answer:
zavuch27 [327]3 years ago
7 0
Idkbdkakhanamakwwwvwbsjozuxbsbakakzuxjnwnaushx
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2 years ago
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Given that cos(theta) = 8/17 and that theta lies in Quadrant IV, what is the exact value of sin 2(theta)?
Deffense [45]

Answer:    -\frac{240}{289}

=========================================================

Explanation:

Use the pythagorean trig identity \sin^2(\theta)+\cos^2(\theta) = 1 and plug in the fact that \cos(\theta) = \frac{8}{17}\\\\

Isolating sine leads to \sin(\theta) = -\frac{15}{17}\\\\. I'm skipping the steps here, but let me know if you need to see them.

The result is negative because we're in quadrant 4, when y < 0 so it's when sine is negative.

Therefore,

\sin(2\theta) = 2\sin(\theta)\cos(\theta)\\\\\sin(2\theta) = 2*\left(-\frac{15}{17}\right)*\left(\frac{8}{17}\right)\\\\\sin(2\theta) = -\frac{240}{289}\\\\

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1 year ago
What is (4y) to the second power when y =-5
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7 0
3 years ago
At a school, 177 students play a sport. This is 60% of the students that go to the school. How many students are at the school?
TEA [102]

Answer:

the answer is 205

Step-by-step explanation:

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Makovka662 [10]

Answer:

  • See below

Step-by-step explanation:

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