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2 years ago

answer whether or not 2/3 of 3/4 of a pan of brownies is the same amount as 3/4 of 2/3 of a pan of brownies

Mathematics

1 answer:

Tom [10]2 years ago

3 0

Truthfulness check:

$\frac{2}{3} * \frac{3}{4} = \frac{3}{4} * \frac{2}{3}$
$\frac{6}{12} = \frac{6}{12} (TRUE)$

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Arisa [49]

Answer:

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Step-by-step explanation:

Since slope is 8/1 which is equal to 8 and x-intercept is 0.

Put these in slope-intercept equation i.e y = mx + b

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2 years ago

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3 years ago

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Vanyuwa [196]

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3 years ago

7y + 4x + 4 - 2x + 8 what is the coefficient

Romashka [77]

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3 years ago

Prove that sin20sin40sin60sin80=3/16

never [62]

We'll use the following properties of sine and cosine to prove this:

$sin(a)\cdot sin(b) = \frac12(cos(a-b) - cos(a+b))$

$cos(a)\cdot cos(b) = \frac12(cos(a+b) + cos(a-b))$

$cos(180+a) = cos(180-a)$

Then it's just a matter of filling it in...

sin20sin40 * sin60sin80 = 1/2(cos20 - cos60) * 1/2 (cos20 - cos140) =

1/8( cos40 + 1 - cos160 - cos120 - cos40 - cos80 + cos80 + cos200) =

1/8(1 - cos160 - cos120 + cos200) =

1/8(1 - cos160 - cos120 + cos160) =

1/8(1 - cos120 ) = 1/8( 1 + 1/2 ) = 3/16

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3 years ago