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2 years ago

Please help me! Thank you if you do!

Mathematics

2 answers:

aev [14]2 years ago

5 0

Answer : c
step by step explanation :

lesya692 [45]2 years ago

4 0

Answer:

it is C

Step-by-step explanation:

why because look at the numbers and youll understand

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The mean of 4 numbers is 21. calculate the sum of the 4 numbers

Ugo [173]

Answer:

Step-by-step explanation:

The mean is calculated as

mean = $\frac{sum}{count}$ , then

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sum = 84

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2 years ago

$35+0.50()=52 what does this equal

katen-ka-za [31]

Answer:

$(34)$

Step-by-step explanation:

We are looking for what number times .50 makes the equation true.

So, just do backwards equation:

$52 - 35$

$==> 17$

Thus, meaning that what multiplied by 0.50 is equal to 17?

[tex]0.50 * 34[tex]

[tex]==> 17[tex]

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3 years ago

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Please someone help me to prove this.

dem82 [27]

<h3>Answer :</h3>

We know that,

$\dag\bf\:sin^2A=\dfrac{1-cos2A}{2}$

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Now, Let's solve !

$\leadsto\:\bf\dfrac{sin^2A-sin^2B}{sinA\:cosA-sinB\:cosB}$

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$\leadsto\:\sf\dfrac{1-cos2A-1+cos2B}{sin2A-sin2B}$

$\leadsto\:\sf\dfrac{2sin\frac{2A+2B}{2}\:sin\frac{2A-2B}{2}}{2sin\frac{2A-2B}{2}\:cos\frac{2A+2B}{2}}$

$\leadsto\:\sf\dfrac{sin(A+B)}{cos(A+B)}$

$\leadsto\:\bf{tan(A+B)}$

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3 years ago

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3 years ago

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luda_lava [24]

Is this what you looking for??

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2 years ago

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