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2 years ago

What is -3(m+6)-(11+9m)

Mathematics

2 answers:

Lady bird [3.3K]2 years ago

7 0

-3(m+6)-(11+9m)

distribute

-3m -3*6 -11-9m

-3m -18 -11-9m

-12m -29

ELEN [110]2 years ago

3 0

First use the distributive property to multiply the first set of parentheses with the -3 and the second parentheses flip the signs because its negative

(-3m-18)+(-11-9m)

Then remove parentheses because it is addition and combine like terms

-12m - 29

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Answer:

Step-by-step explanation:

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3 years ago

Rewrite with only sin x and cos x.

Annette [7]

Option A

$\cos 3 x=\cos x-4 \cos x \sin ^{2} x$

<em><u>Solution:</u></em>

Given that we have to rewrite with only sin x and cos x

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We know that,

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Therefore,

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Substituting these values in eqn 1

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Applying this in above eqn 2, we get

$\cos (x+2 x)=\cos x\left(1-2 \sin ^{2} x\right)-\sin x(2 \sin x \cos x)$

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2 years ago

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Step-by-step explanation:

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2 years ago

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Use the distributive property. The factor outside parentheses multiplies each term inside parentheses.

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$(3x-5)(2x-10)=3x(2x-10)-5(2x-10)\\\\=6x^2-30x-10x+50=\boxed{6x^2-40x+50}$

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1 year ago

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Nadya [2.5K]

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Solution:-

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ρ_air = m_air / V_air

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Answer: ρ_air = 0.15544 kg/m^3

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2 years ago

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