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3 years ago

HELP DUE IN 10 MINS!!

Mathematics

1 answer:

fredd [130]3 years ago

5 0

Answer:

D. No, they are not similar.

Step-by-step explanation:

<u>Check the ratio of the two given sides:</u>

MV/VT = 21/49 = 3/7
LV/VU = 8/28 = 2/7

Ratios are different so the triangles are not similar

Correct choice is D

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leva [86]

THE ANSWER IS D 8 BECAUSE I DID THE MATH

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3 years ago

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<em>WORD PROBLEM:</em>

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3 years ago

Does anyone know how to do these?

ale4655 [162]

Answer:

Step-by-step explanation:

f(x) = $\sqrt[3]{4x}$

g(x) = 2x + 3

$\frac{f}{g}$ (x) = 'f' divided by 'g'

$\frac{\sqrt[3]{4x} }{2x+3}$ Substitute.

x cannot be - $\frac{3}{2}$ because that would create a zero in the denominator.

That's a no-no.

It makes it 'undefined'

7 0

3 years ago

Can someone PLEASE help me with Trigonometry???

Svetach [21]

$\bf sin^2(2\theta)-7sin(2\theta)-1=0\\\\
-------------------------------\\\\
sin(2\theta)=\cfrac{7\pm\sqrt{49-4(1)(-1)}}{2(1)}\implies sin(2\theta)=\cfrac{7\pm\sqrt{49+4}}{2}
\\\\\\
sin(2\theta)=\cfrac{7\pm\sqrt{53}}{2}\implies 2\theta=sin^{-1}\left( \frac{7\pm\sqrt{53}}{2} \right)
\\\\\\
\theta=\cfrac{sin^{-1}\left( \frac{7\pm\sqrt{53}}{2} \right)}{2}$

but anyway, the numerator will give the angles, and θ is just half of each

$\bf \theta=\cfrac{sin^{-1}\left( \frac{7\pm\sqrt{53}}{2} \right)}{2}\\\\
-------------------------------\\\\
sin^{-1}\left( \frac{7+\sqrt{53}}{2} \right)\implies sin^{-1}(7.14)\impliedby \textit{greater than 1, no good}
\\\\\\
sin^{-1}\left( \frac{7-\sqrt{53}}{2} \right)\implies sin^{-1}(-0.14) \approx -8.05^o
\\\\\\
\theta=\cfrac{-8.05}{2}\implies \theta=-4.025$

ok... that's a negative tiny angle, is in the 4th quadrant, if we stick to the range given, from 0 to 360, so we have to use the positive version of it, 360-4.025

so the angle is 355.975°

now, the 3rd quadrant has another angle whose sine is negative, so... if we move from the 180° line down by 4.025, we end up at 184.025°

and those are the only two angles, because, on the 2nd and 1st quadrants, the sine is positive, so it wouldn't have an angle there

7 0

3 years ago

A flute instructor examined student progress.he found that playing a longer song does not necessarily mean that a student will h

Sunny_sXe [5.5K]

Answer:

The flute instructor can conclude that the length of the song does not have a direct variation or correlation with the number of incorrect notes.

Step-by-step explanation:

Direct variation and correlation means that as the "x" variable increases, the "y" variable will change according to it.

If the flute instructor took numerical data, for example, made a chart, and graphed it, then he would not find a trend.

It would probably look like this (see first photo). The plotted points are all over the place. ("x" is the song length, "y" is the number of incorrect notes).

If there was a correlation, then the data would look more like a straight line (see second photo).

5 0

3 years ago