PLEASE ANSWERRR! FIRST CORRECT ANSWER WILL VOTE BRAINLIEST

Mathematics

1 answer:

FinnZ [79.3K]3 years ago

8 0

Answer:

k = 7/4

Step-by-step explanation:

<u>Given system:</u>

x + y + 3z = 10,
-4x + 3y + 5z = 7,
kx + z = 3

<u>Substitute z in the first two equations with z = 3 - kx:</u>

x + y + 3(3 - kx) = 10 ⇒ (1 - 3k)x + y = 1 ⇒ y = (3k - 1)x + 1
-4x + 3y +5(3 - kx) = 7 ⇒ -(4 + 5k)x + 3y = -8 ⇒ y = 1/3(5k + 4) - 8

In order the two equations above not to have a solution, the lines should be parallel. Parallel lines have equal slopes.

<u>Solve the following equation for k:</u>

3k - 1 = 1/3(5k + 4)
9k - 3 = 5k + 4
4k = 7
k = 7/4

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Please explain the problem attached

borishaifa [10]

<h3>Answer:</h3>

F (3x, 3y)

<h3>Explanation:</h3>

Dilation about the origin multiplies each coordinate by the dilation factor. For some coordinates (x, y), dilation by a factor of 3 means the new coordinates are ...

... 3×(x, y) = (3x, 3y)

_____

<em>Comment on the problem</em>

The way the problem is worded, you expect an answer choice that will be specific to the coordinates of point A. There are none.

Instead, the answer choices are generic, corresponding to dilation of a point (x, y) by a factor of 3, translation up and to the right by 3, dilation by a factor of 1/3, and translation down and to the left by 3.

8 0

4 years ago

100 points PLEASE HELP!!!

wel

Answer:

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8 0

2 years ago

-6.5 = z/3 I’m sooo confused.

OLEGan [10]

Answer: z = -19.5

Step-by-step explanation: