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3 years ago

Find the solution to the equations. 3x - y = -4 X + y = 0

Mathematics

2 answers:

adell [148]3 years ago

6 0

Answer:

Both the lines shown by above two equations have same slope = 3 i.e. the lines are parallel to each other i.e. they don't intersect each other hence the given system of linear equations has no solution .

Step-by-step explanation:

Zepler [3.9K]3 years ago

5 0

Answer:

x = -1; y = 1

Step-by-step explanation:

3x - y = -4

x + y = 0

Since you have -y and +y in the two equations, you can add them and eliminate y.

Add the equations.

4x = -4

x = -1

Now substitute -1 for x in the second equation and solve for y.

-1 + y = 0

y = 1

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4 years ago

Find the product.

4vir4ik [10]

Answer :

$6{y}^{4} {z}^{2} + 12 {y}^{3} {z}^{2}-3 {y}^{3} {z}+3 {y}^{2} {z}^{2}$

Step-by-step explanation :

To find the product of

$3 {y}^{2} z(2 {y}^{2} z + 4yz - y + z)$

First we expand the bracket ,

it implies that, we use the expression outside the bracket to multiply individual expressions inside the bracket.

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we now apply the law of indices

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meaning, when you are multiplying two expressions with the same bases , repeat one of the bases and add the exponents.

Then, simplify to obtain

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3 years ago

Find the area of a circle with a circumference of 31.4 units.

Elden [556K]

Answer:

area = 78.46

Step-by-step explanation:

31.4 = 2pi * r

divide 31.4 by 2 and get 15.7

15.7 = pi * r

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3 years ago

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PLEASE PLEASE HELP I REALLY NEED IT!! I KEEP GETTING WRONG ANSWERS

devlian [24]

Answer:

(x,y)↦ ( x + 1 ) , ( y + 9 )

scale factor 2

Step-by-step explanation:

Step 1 identify the translation.

To do this we find the center of ⨀T and the center of ⨀T' and find the difference between their x and y values.

The center of ⨀T is at ( -1 , -7 )

The center of ⨀T' is at ( 0 , 2 )

we now find the difference between the x and y values. ( note that you must subtract the x and y values from the preimage from the translated image to get the correct translation. )

For the x values: 0 - ( - 1 ) = + 1

For the y values: 2 - ( -7 ) = + 9

So translation was (x,y)↦ ( x + 1 ) , ( y + 9 )

step 2 Find the scale factor

We can identify the scale factor by dividing the radius of the preimage by the radius of the dilated image.

The radius can be identified by finding the distance between the center and any point on the circle

The radius of the preimage is 3

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So scale factor = 6 / 3 or 2

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