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3 years ago

Please help me I will give you the brain thing and extra points (image below) 1/5

Mathematics

2 answers:

tresset_1 [31]3 years ago

8 0

Answer:

Step-by-step explanation:

A is the only answer with a correct slope

well you dont need to know anything about special triangles

You just need to know rise over run

for example when you wake up, do you run or rise first, rise first.

so Q is the only one rising so it should be the numerator, the others are putting run first.

nignag [31]3 years ago

4 0

The answer is A hope this helps

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antoniya [11.8K]

Answer:

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3 years ago

Read 2 more answers

1 point

Margarita [4]

Answer:

35% or 0.35

Step-by-step explanation

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4 years ago

80 members decreased by 65%

LekaFEV [45]

Do a proportion
65/100= x/80

Cross multiply and divide
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3 years ago

Sin α = 21/29, α lies in quadrant II, and cos β = 15/17, β lies in quadrant I Find sin (α - β).

Sever21 [200]

$\sin(\alpha-\beta)=\sin\alpha\cos\beta-\cos\alpha\sin\beta$

$\sin\alpha=\dfrac{21}{29}\implies \cos^2\alpha=1-\sin^2\alpha=\dfrac{400}{841}$

Since $\alpha$ lies in quadrant II, we have $\cos\alpha$ , so

$\cos\alpha=-\sqrt{\dfrac{400}{841}}=-\dfrac{20}{29}$

$\cos\beta=\dfrac{15}{17}\implies\sin^2\beta=1-\cos^2\beta=\dfrac{64}{289}$

$\beta$ lies in quadrant I, so $\sin\beta>0$ and

$\sin\beta=\sqrt{\dfrac{64}{289}}=\dfrac8{17}$

So

$\sin(\alpha-\beta)=\dfrac{21}{29}\dfrac{15}{17}-\left(-\dfrac{20}{29}\right)\dfrac8{17}=\dfrac{475}{493}$

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3 years ago

____ is necessary because researchers in the social sciences almost never have enough resources — time or money — to collect inf

Tanya [424]

Answer:

Sampling is necessary because researchers in the social sciences almost never have enough resources — time or money — to collect information about the entire set of subjects of interest to them.

Step-by-step explanation:

Sampling is done because you usually cannot gather data from the entire population. Even in relatively small populations, the data may be needed urgently, and including everyone in the population in your data collection may take too long.

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3 years ago