3 years ago

What is the answer the the equation 3(n-4)= -9

Mathematics

1 answer:

Inga [223]3 years ago

4 0

Answer:

i believe the answer is N=1

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3(x - 1) = 2x+9 ¿cómo puedo resolver este problema?

inysia [295]

Answer:

x=12

Step-by-step explanation:

3(x-1)=2x+9

3x-3=2x+9

3x-2x-3=9

x-3=9

x=9+3

x=12

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4 years ago

Identify the slope of the line graphed below. m =

bonufazy [111]

the slope is 0 bc its horizontal

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4 years ago

Perimeter is 100 meters length is 12 m more than width what is length and width

MrRa [10]

Perimeter of rectangle = 2(l+w)

let. width = x, length = x+12

So, 100 = 2(x+x+12)

100=2(2x+12)

100=4x+24

4x=76

x=19, y=19+12 = 31

So, Length = 31 m & Width = 19 m

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4 years ago

Find the indicated value. Use either half angle formulas or sum and difference formulas.

MrMuchimi

By the angle difference formula for sines, we have:

$\sin 15^\circ = \sin 45^\circ \cos 30^\circ - \sin 30^\circ \cos 45^\circ = \frac{sqrt{6}}{4} - \frac{sqrt{2}}{4} = \frac{\sqrt{6} - \sqrt{2}}{4}.$

By the angle sum formula for tangents, we have:

$\tan 75^\circ = \frac{\tan 45^\circ + \tan 30^\circ}{1 - \tan 45^\circ \tan 30^\circ} = \frac{1+\frac{\sqrt{3}}{3}}{1 - \frac{\sqrt{3}}{3}} = \frac{3 + \sqrt{3}}{3 - \sqrt{3}}$ .

Rationalizing the denominator gives $\frac{12+6\sqrt{3}}{6} = 2+\sqrt{3}$ as the final answer.

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4 years ago