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3 years ago

Please solve for n: d=c-s/n HELP ASAP!! thanks! :)

Mathematics

1 answer:

puteri [66]3 years ago

6 0

Answer:

n=-s÷d-c

Step-by-step explanation:

d=c-s÷n
n×d=n×c-s÷n×n
group like terms
nd-nc=-s
n(d-c)=-s
n=-s÷d-c

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2 years ago

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Answer:

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2 years ago

-1≤ 3x-10≤ 2 please help me

kicyunya [14]

Answer:

3 ≤ x ≤ 4

Step-by-step explanation:

Step 1: Add 10 to all parts/sections.

$-1 + 10 \leq 3x - 10 + 10 \leq 2+10$
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2 years ago

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3 years ago

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Prove this 1-tan^2x/1+tan^2x=cos^2x-sin^2x

tatiyna

Answer:

see explanation

Step-by-step explanation:

Using the identity

tan x = $\frac{sinx}{cosx}$

Consider the left side

$\frac{1-tan^2x}{1+tan^2x}$

= $\frac{1-\frac{sin^2x}{cos^2x} }{1+\frac{sin^2x}{cos^2x} }$ ( multiply numerator and denominator by cos²x to clear fractions

= $\frac{cos^2x-sin^2x}{cos^2x+sin^2x}$ ← ( cos²x + sin²x = 1 ]

= cos²x - sin²x

= right side , thus proven

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2 years ago