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2 years ago

Which equation represents the line shown?

Mathematics

1 answer:

vredina [299]2 years ago

5 0

Answer:

Step-by-step explanation:

The line is running only across coordinate points with an x coord of 2

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Find the sum of 12a + 7b, −6a − 9, and 14a − 12b.

VARVARA [1.3K]

Answer:

20a + -5b + -9

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

The sum of three times a number, and 3, is equal to two times the number.

ale4655 [162]

3x + 3 = 2x

three times a number = 3x ,and 3 = 3x + 3, is equal to two times the number =

3x + 3 = 2x

6 0

3 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

3 years ago

(3x²+6)(3x²-6) please help

givi [52]

Answer:

9x^4 -36

Step-by-step explanation:

see image below:)

4 0

2 years ago

y is inversely proptional to x when y = 7, x = 9 a) work out an equation connecting y and x b) work out the value of y when x =

OLga [1]

Answer:

a) yx=63

b) y=3

Step-by-step explanation:

yx=k (inverse formula)

7(9)=k

63=k

y(21)=63

y=63/21

y=3

3 0

3 years ago