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3 years ago

6

ILL GIVE BRAINLIEST PLZ HELP

2 answers:

Lena [83]3 years ago

8 0

B, because if you divide 7 by 9, you get 0.7 repeated, which if rounded is 0.78

s2008m [1.1K]3 years ago

3 0

$7 \div 9 = 0.77777778$
Thus the approximation of 7/9 will be 0.78

HOPE IT HELPS UH!!☺️☺️

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Find the area of the triangle if A=1/2bh

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3 years ago

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Solve the expresssion x − 5 = 17

CaHeK987 [17]

Answer: x = 22

Step-by-step explanation:

We must isolate the x by itself.

We need to add 5 to both sides of the equation so it cancel out from the side with x.

So x = 22

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The daily average temperature in Santiago, Chile, varies over time in a periodic way that can be modeled approximately by a trig

natali 33 [55]

Answer:

a) the trigonometric function is;

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Step-by-step explanation:

This data can be represented by the sinusoidal function of the form :

$\mathbf{y = A sin (Bt -C)+D}$

where A = amplitude and which can be determined via the formula:

$A = \dfrac{largest \ temperature - lowest \ temperature}{2}$

$A = \dfrac{29-14}{2}$

$A = \dfrac{15}{2}$

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where B = the frequency;

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D = $\frac{29+14}{2}$

D = 21.5

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From the question; when it is 7th of the year ( i.e January 7);

t = 7 and the temperature (y) = 29° C

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$29= 7.5 sin (\frac{2 \pi}{365}*7 -C) + 21.5$

$29= 7.5 sin (\frac{14 \pi}{365} -C) + 21.5$

$\frac{29-21.5}{7.5}= sin (\frac{14 \pi}{365} -C)$

$1= sin (\frac{14 \pi}{365} -C)$

$sin^{-1}(1)= (\frac{14 \pi}{365} -C)$

$\frac{\pi}{2}= (\frac{14 \pi}{365} -C)$

$C= (\frac{14 \pi}{365} -\frac{\pi}{2})$

$C= (\frac{28 \pi- 365 \pi}{730} )$

$C= \frac{-337 \pi}{730}$

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$y = 7.5 sin ( \frac{2 \pi}{365}t + \frac{337 \pi}{730})+ 21.5$

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$y = 7.5 sin ( \frac{62 \pi}{365}+ \frac{337 \pi}{730})+ 21.5$

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Alinara [238K]

Answer:

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