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Helen [10]
3 years ago
5

Evaluateeee????????????

Mathematics
2 answers:
andreev551 [17]3 years ago
8 0
The answer is 15. just replace the letters with the numbers they're equal to.
amid [387]3 years ago
4 0
3x^2 - 2xy + 4y^2 ; x = -1 , y = -2
3(-1)^2 - 2(-1)(-2) + 4(-2)^2
3(1) - 4 + 16
3 - 4 + 16
-1 + 16
15

The answer is c) 15
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bazaltina [42]

Answer:

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4 0
3 years ago
HELP ME PLZ ASAP 80 POINTS
KiRa [710]

Answer:

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x        y

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5 0
3 years ago
Find the interval in which f(x)=sinx−cosx is increasing or decreasing?
alisha [4.7K]

Answer:

There is no short answer.

Step-by-step explanation:

To find to intervals which f(x) increases or decreases, we first need to find it's derivative.

f(x) = sinx - cosx\\f'(x) = cosx - (-sinx) = cosx + sinx

The function is increasing when it's value is  > 0 and decreasing when it's value is < 0.

If we take a look at this graph, cosx+sinx is positive when they are both positive or when cosx is greater then sinx on the negative part.

I hope this answer helps.

3 0
3 years ago
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mash [69]
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6 0
3 years ago
Please help this is already late ​
GaryK [48]

Answer:

C = 132°

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12 (4)

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4 0
3 years ago
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