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olga55 [171]
3 years ago
11

Pls help me !!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
5 0

its 50.3.2  tags: c c c cc  cc c  c c c ar c free car no yes show two plus pwe

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How would you go about finding the solution to this system of three equations in three variables? Be specific. For example, you
kupik [55]
I:2x – y + z = 7
II:x + 2y – 5z = -1
III:x – y = 6

you can first use III and substitute x or y to eliminate it in I and II (in this case x):
III: x=6+y
-> substitute x in I and II:
I': 2*(6+y)-y+z=7
12+2y-y+z=7
y+z=-5

II':(6+y)+2y-5z=-1
3y+6-5z=-1
3y-5z=-7

then you can subtract II' from 3*I' to eliminate y:
3*I'=3y+3z=-15

3*I'-II':
3y+3z-(3y-5z)=-15-(-7)
8z=-8
z=-1

insert z in II' to calculate y:
3y-5z=-7
3y+5=-7
3y=-12
y=-4

insert y into III to calculate x:
x-(-4)=6
x+4=6
x=2

so the solution is
x=2
y=-4
z=-1
3 0
3 years ago
What is the slope between these two points?<br> (0,13) and (-4,10)
DIA [1.3K]
First you will use the slope formula:
M= Rise/Run = Y2-Y1/X2-X1

(0,13) (-4,10)

10-13
——— = -3/4 = 3/4
-4-0.
8 0
3 years ago
Nick billups is paid a salary of $ 900 a month, a 2 % commission on all sales, and 1.8 % more on monthly sales over $ 17,500. In
Trava [24]
June :
900 + 0.02(48,500) + 0.018(48500 - 17500) = 
900 + 970 + 558 = 2428 <==

July :
900 + .02(50,200) + 0.018(50200 - 17500) =
900 + 1004 + 588.60 = 2492.60 <===
5 0
3 years ago
Read 2 more answers
HELP PLEASE ASAP!!!!!
borishaifa [10]

Answer:  Second option is correct.

Step-by-step explanation:

A company wants to try out two new toothpaste brands (brand A and brand B) on customers who use the company's existing toothpaste brand.

So, the best method for this study is an experiment.

As the company will try its two new brands who are already using their existing toothpaste brand.

They will get to know their like and dislike about their two new toothpaste brands.

Hence, Second option is correct.

7 0
3 years ago
Read 2 more answers
10. A veterinarian is changing the diets of two animals,
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Answer:

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5 0
3 years ago
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