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alexandr402 [8]
3 years ago
14

PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELPPPPPPPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Mathematics
1 answer:
MaRussiya [10]3 years ago
7 0

speed =  \frac{distance}{time}  \\

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X-2y+z=5 <br>3x+3y-2z=-6 <br>2x-y+3z=11 <br>find x+y+z
BartSMP [9]
      x - 2y + z = 5   | *2
 ⇒ 2x - 4y+ 2z=10
     3x + 3y - 2z = - 6     } I sum up these relations
--------------------------------
    2x+3x - 4y+3y+2z-2z=10-6
     5x - y = 4       (1)

    3x + 3y - 2z = - 6   | *3         ⇒ 9x + 9y - 6z = - 18
    2x - y + 3z = 11     | *2         ⇒ 4x - 2y + 6z= 22       I sum up these
                                              ----------------------------------
                                                ⇒ 9x+4x+9y-2y-6z+6z= 4
                                                     13x+ 7y= 4     (2)
I write (1) and (2)
5x - y = 4   | *7
35x - 7y= 28
13x+7y=4
48x = 32
x= 32/48=4/6 ( 32:8=4, 48:8=6)
x= 2/3
5x-y=4, 
5*2/3-y=4
y=10/3 -4=10/3-12/3=-2/3
⇒ y= - 2/3
x - 2y + z = 5
2/3 - 2*(-2/3)+z=5
2/3+4/3+z=5
6/3+z=5
2+z=5
z=3
x+y+z=2/3-2/3+3=3

x+y+z=3







3 0
3 years ago
If m1 =53 what is m3
Thepotemich [5.8K]

Answer:

143

Step-by-step explanation:

90-53=37

180-37=143

5 0
3 years ago
How do I simplify the expression 7^0+7^2 over (7^3)^2
AlekseyPX

\frac{7^0+7^2}{(7^3)^2}=\frac{1+49}{7^6} = \frac{50}{117649}

Ok done. Thank to me :>

7 0
2 years ago
What numbers add to 4 but multiply to 1
dem82 [27]
1 + 1 + 1 + 1 = 4
1 x 1 x 1 x 1 = 1
8 0
3 years ago
Please please help I really having a hard time with this thank you
lina2011 [118]
1. Number 5 plus x
2. Number 5 minus x
3. Five times x
4. Five divided by x
5. 3 fourths of x plus 2
6. 2 minus three fourths of x
7. 3 times x plus 10
8. 10 times x plus 3
4 0
3 years ago
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