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andriy [413]
3 years ago
10

31. What is the solution to the system of equations? -7x-2y+z=-2 6x-y-z=-18 5x+4y-z=18

Mathematics
1 answer:
Law Incorporation [45]3 years ago
8 0

Answer:

x = -1, y = 7, z = 5

  1. -7 -2 -1 -2
  2. 6 -1 -1 -18
  3. 5 4 -1 18

use 2. - 3.

= -1 -5 0 -36 --- 4.

use 1. + 2.

= -1 -3 0 -20 --- 5.

use 4. + 5.

= 0 -8 0 -56

=> y = 7

y = 7 back into 5.:

x - 35 = -36

=> x = -1

x = -1 and y = 7 back into 1.:

7 - 14 + z = -2

=> z = 5

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If an object has a volume of 20 cubic inches and weights 28ounces what is the constant variation
AveGali [126]

Answer:

7/5 is the constant variation.

Hope this helps! Have a great day!

6 0
3 years ago
Given that h(x) = 3x −19, find the value of x that makes h(x) = 71.
rosijanka [135]

Keywords:

<em>Equation, variable, value, clear </em>

For this case we have an equation with a variable of the form y = h (x). Where h (x) = 3x-19. Given the value ofh (x) = 71, we want to find the value of the variable "x". So, we have:

h (x) = 3x-19\\71 = 3x-19

We must clear "x", for this, we add "19" to both sides of the equation:

71 + 19 = 3x-19 + 19\\90 = 3x

We divide between "3" on both sides of the equation:

\frac {90} {3} = \frac {3x} {3}\\30 = x

Thus, the value of the variable "x" is 30.

Answer:

x = 30

Option A

6 0
3 years ago
Read 2 more answers
PLLLLLLEAASSSSSSE HHHEEELLLPP AAAASSAPP
NeTakaya

Answer:

<em>The true statements are:</em>

<em>*The median weight for shelter A is greater than shelter B.</em>

<em>*The (IQR) interquartile range of shelter A is greater than the (IQR) interquartile range of shelter B.</em>

Step-by-step explanation:

<em>(for shelter A)</em>

median: 21

lowest value: 8

highest value: 30

lower quartile: 17

upper quartile: 28

(IQR) interquartile range: 28 - 17 = 11

Range: 30 - 8 = 22

<em>(for shelter B)</em>

median: 18

lowest value: 10

highest value: 28

lower quartile: 16

upper quartile: 20

(IQR) interquartile range: 20 - 16 = 4

Range: 28 - 10 = 18

~phew!, this took me long xd, hope this helps you~

I would highly appreciate it if you would mark me the brainliest~ :)

4 0
3 years ago
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igor_vitrenko [27]
F (x)= x+12 is the inverse of the function
7 0
3 years ago
50 PTS!!! When 1250^3/4 is written in simplest radical form, which value remains under the radical?
rewona [7]
4 radical 1250^3.
The 3 stays on the inside, hope this helps.
7 0
3 years ago
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