3 years ago

Hello please help! Thank you!!

Mathematics

2 answers:

vova2212 [387]3 years ago

8 0

Answer:

20 degrees

Step-by-step explanation:

alexandr402 [8]3 years ago

4 0

Answer:

Add all together and subtract by 240.

Step-by-step explanation:

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BlackZzzverrR [31]

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Step-by-step explanation:

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3 years ago

13 - (n • 6) = 50 Pls help what would be the equation

olya-2409 [2.1K]

Answer:

n=-17/3

Step-by-step explanation:

16-(n.6)=50

16-6n=50

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Answer:

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3 years ago

What is the justification for the first step in proving the formula for factoring the sum of cubes?

Anna11 [10]

Explanation:

The formula isnt correctly written, it should state:

$a^3+b^3 = (a+b)(a^2-ab+b^2)$

You have to start from $(a+b)(a^2-ab+b^2)$ and end in a³+b³. On your first step, you need to use the distributive property.

$(a+b)(a^2-ab+b^2) = a*(a^2-ab+b^2) + b*(a^2-ab+b^2)$

This is equal to

$a*a^2-a*(ab) + a*b^2 + b*a^2-b*(ab) + b*b^2 = a^3 - a^2b + ab^2 +ba^2 -b^2a +b^3$

Note that the second term, -a²b, is cancelled by the fourth term, ba², and the third term, ab², is cancelled by the fifht term, -b²a. Therefore, the final result is a³+b³, as we wanted to.

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4 years ago

Subtract -5x^2+2x-5−5x 2 +2x−5 from 7x^2-47x 2 −4.

marta [7]

Answer:

-12x^2+46x-6

Step-by-step explanation:

combine like tens and subtract then from eachother

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3 years ago