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Ksivusya [100]
2 years ago
15

Please help !!!!!!!!!!

Mathematics
1 answer:
suter [353]2 years ago
7 0

Answer:

the third option in the list

Step-by-step explanation:

the numbers down below qre the coefficients of the equations above

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<img src="https://tex.z-dn.net/?f=x1%2B2x2-x3%3D3%2C%202x1%2Bx2-2x3%3D1%2C%203x1%2B4x2-5x3%3D5" id="TexFormula1" title="x1+2x2-x
o-na [289]

Answer: x1 = 0; x2 = 5/3; x3 = 1/3

x1 + 2x2 - x3 = 3 => 2x1 + 4x2 - 2x3 = 6

                                2x1 + x2 - 2x3 = 1

=> 4x2 - x2 = 5

⇔ 3x2 = 5

⇔ x2 = 5/3

with x2 = 5/3, we have: x1 - x3 = 3 - 10/3 = -1/3

                                        3x1 - 5x3 = 5 - 4.5/3 = -5/3

=> x1 = 0

    x3 = 1/3

Step-by-step explanation:

7 0
3 years ago
Linda had dinner at a restaurant for $56 and leaves behind a tip of 18%. What is the tip amount?
Alex_Xolod [135]

Answer:

=  \frac{18}{100}  \times 56 \\  = 10.08 \: dollars

3 0
3 years ago
Read 2 more answers
What is the common mutiple for 1/2 1/4 1/6 1/3 and 1/5
grin007 [14]
The common multiple for 1/2 1/4 1/6 1/3 and 1/5 would be 60: 

2 x 30 = 60
3 x 20 = 60 
4 x 15 = 60
5 x 12 = 60 
6 x 10 = 60 
5 0
4 years ago
Please helppppp!!!!!!!!
Drupady [299]

Answer:

128 cm^2

Step-by-step explanation:

The area of a trapezoid is given by

A = 1/2 (b1+b2) h

where b1 and b2 are the lengths of the bases and h is the height

A =1/2( 10+22) * 8

A = 1/2 (32)8

  = 128

7 0
3 years ago
Read 2 more answers
Find the missing measure​
Vilka [71]
25 degrees because 90-65=25
5 0
3 years ago
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