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Murrr4er [49]
3 years ago
15

Which expression gives the z-coordinate of the solution of the system x+2y-2z=3?

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
3 0
From the system of equation
x+2y-2z=3
3x-y+z=16
x+z=7
we solve the system as follows:
add equation i and ii
x+2y-2z=3
6x-2y+2z=32

7x=35
x=5
thus
z=2

2y+5-4=3
2y=2
y=1

hence
x=5, y=1 z=2
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When rounding 1.50 to one decimal place we use One Decimal Place Rule #1. Therefore, the answer to "What is 1.50 rounded to 1 decimal place?" is:

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