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Lyrx [107]
3 years ago
8

3(2x 4y - 2z) 7(x y - 4z)

Mathematics
1 answer:
Anastasy [175]3 years ago
3 0
3(2x + 4y - 2z) + 7(x + y - 4z) = 6x + 12y - 6z + 7x + 7y - 28z = 13x + 19y - 34z

Option c is the correct answer.
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What is the height in meters of a person who is 6 ft 1.0 in. tall? (assume that 1 meter equals 39.37 in.)?
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1 foot = 12 inch so 6 feet = 6*12 inch
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x = 73/39.37 = 1.85 meters
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4 0
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8 0
3 years ago
4x - 7y = 3 <br> x - 7y = 15
charle [14.2K]
\left \{ {{4x-7y=3} \atop {x-7y=15}} \right. \\\\&#10; \left \{ {{4x-7y=3} \atop {x=15+7y}} \right. \\\\ substitution\ method\\\\&#10;4*(15+7y)-7y=3\\\\&#10;60+28y-7y=3\\\\&#10;60+21y=3\ \ \ \ | subtract\ \\\\&#10;21y=-57\\\\&#10;y=-\frac{57}{21}=-\frac{19}{7}\\\\&#10;x=15+7*(-\frac{19}{7})=15-19=-4\\\\\ Solution :\  \left \{ {{y=-\frac{19}{7}} \atop {x=-4}} \right.
5 0
3 years ago
Help me with this please
zloy xaker [14]

Answer:

Step-by-step explanation:

for x, then  7 = (x1+9) /2

14 = x1+9

5 = x1

for y , then 4 = (y1+7 ) /2

8 = y1 + 7

1 = y1

J = (5,1)

5 0
3 years ago
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