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jenyasd209 [6]
2 years ago
12

Determine whether the statement a through d about f,g and h are true or false

Mathematics
1 answer:
zalisa [80]2 years ago
6 0

Answer:

n

               Step-by-step explanation:n

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X+3y-2z=10, -x-2y+z=-7, 3x+9y-5z=28
NISA [10]
Hmm
what you do is try to eliminate 1 variable in 2 equaions first
we can elminate x's in first and 2nd equation

add first and 2nd equation
x+3y-2z=10
<u>-x-2y+z=-7 +</u>
0x+y-z=3
y-z=3


multiply 2nd equation by 3 and add to last one
-3x-6y+3z=-21
<u>3x+9y-5z=28 +</u>
0x+3y-2z=7

3y-2z=7

we now have
y-z=3
3y-2z=7
multiply first equation by -2 and add to 2nd

-2y+2z=-6
<u>3y-2z=7 +</u>
y+0z=1
y=1

now we can sub back
y-z=3
1-z=3
minus 1
-z=2
times -1
z=-2

sub baack into any equation
x+3(1)-2(-2)=10
x+3+4=10
x+7=10
minus 7
x=3

x=3
y=1
z=-2
(3,1,-2)

6 0
3 years ago
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vlada-n [284]

Answer:90

Step-by-step explanation:

the angle is perpendicular

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1 year ago
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a sailfish can go as fast as 68mph. in 1 min. can a sailfish swim as far as 1 mile? explain the answer.
Bezzdna [24]
Yes the sailfish can swim one mile
7 0
3 years ago
Just need some help please
Vlad1618 [11]

Answer:

It is y = -4/5x - 2 because you go left 4 and down 5 which makes both negative. And of course it is minus two.

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3 years ago
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HELP!!!!
Olin [163]
So if she picked 32 apples on Tuesday, and she picked 15 more apples than on Monday, then she picked 17 apple on Monday, because 17+15=32. A=17
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2 years ago
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