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3 years ago

Are any of these a function

Mathematics

1 answer:

Elena-2011 [213]3 years ago

6 0

Answer:

Yes because the 1st and 3rd one are functions

Step-by-step explanation:

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Change 90 euros to pounds

kati45 [8]

Answer:

The exact amount of British pounds would be 81.769

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Help me with this problem please

andreev551 [17]

Answer:

$y = \frac{ - 3x + 6}{2} = \\ x = 4 \\ y = \frac{ - 3 \times 4 + 6}{2} = \frac{ - 12 + 6}{2} = \frac{ - 6}{2} = - 3$

3 0

2 years ago

zubka84 [21]

Answer:

See Explanation Below

Step-by-step explanation:

Given

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx.cos x.$

Required

Prove

To start with; we open the bracket on the left hand side

$(sin x - cos x)^2 = (sin x - cos x)(sin x - cos x)$

$(sin x - cos x)^2 = (sin x )(sin x - cos x)- (cos x)(sin x - cos x)$

$(sin x - cos x)^2 = sin^2 x -sinx cos x - sin xcos x + cos^2 x$

$(sin x - cos x)^2 = sin^2 x -2sinx cos x + cos^2 x$

Reorder

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

From trigonometry;

$sin^2x + cos^2x = 1$

So;

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

becomes

$(sin x - cos x)^2 = 1 - 2sinx cos x$

Also from trigonometry;

$sec^2x - tan^2x = 1$

So,

$(sin x - cos x)^2 = 1 - 2sinx cos x$

becomes

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx cos x$

Proved

3 0

2 years ago

*ANSWER CORRECTLY FOR MARK AS BRAINILISTE*

kkurt [141]

Answer: The Mean absolute deviation is 5. The mean is 10.

2 is 8 away from the mean.

5 is 5 away from the mean.

9 is 1 away from the mean.

10 is 0 away from the mean.

17 is 7 away from the mean.

19 is 9 away from the mean

Step-by-step explanation:

Hope this helps!

pls mark brainliest :)

5 0

3 years ago

What is the answer for 6?

marusya05 [52]

IS the answer ii and iv

and the other is y<5.3

7 0

2 years ago