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2 years ago

Please help? This is complicated

Mathematics

1 answer:

Andreyy892 years ago

5 0

D,

You basically see if statements are correct or not. Remember this is sample, sample is portion of population so if everything is dome correctly, the results of sample will also display the results of population +- error (standard deviation). So you can just use the sample results to answer questions about the population.

A is correct because social studies has 4 students and reading has 8. Math has twice.
B is correct because reading has 2 and math has 8. Reading is one fourth of math 8*1/4 = 8/4=2.
D is NOT correct because math is 8, social studies is 4. Math is not half of social studies. Social studies is half of math.

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If cos -105º = -0.26 and csc -105º = -1.03, then cos 105º = and csc 105º = .

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cos (105°) = - 2.6

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Step-by-step explanation:

Given that cos (-105°) = - 0.26 {The negative sign is due to the angle - 105° lies in the third quadrant where cos value is negative}

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And csc (105°) = 1.03, because 105° lies in the second quadrant and here csc value is positive. (Answer)

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4 years ago

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Step-by-step explanation:

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3 years ago

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3 years ago

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inna [77]

Hello! First insert 6 where the h is located. So we have an equation that looks like the following. $6 = 2 - 18t + 16t^2$

Although you could leave the equation in its original form, I am going to switch it around.
$6 = 2 - 18t + 16t^2$
$16t^2 - 18t + 2 = 6$
Move the 6 to the other side and do the math
$16t^2 - 18t + 2 - 6 = 6 - 6$
$16t^2 - 18t -4 = 0$
Factor and after factoring your T will be as follows
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t = $\frac{9}{16} + \frac{\sqrt{145}}{16}$ = 1.315

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3 years ago

Please help? This is complicated​

Please help? This is complicated