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earnstyle [38]
3 years ago
6

X + 3y + 2z = 7

Mathematics
2 answers:
omeli [17]3 years ago
7 0

Step-by-step explanation:

x + 3y + 2z = 7

2x − y + z = 9

-x + 4y + 5z = 14

First add the first and third equations to eliminate x.

7y + 7z = 21

Simplify:

y + z = 3

Solve for y:

y = 3 − z

Substitute into the first two equations:

x + 3(3 − z) + 2z = 7

2x − (3 − z) + z = 9

Simplify:

x + 9 − 3z + 2z = 7 → x − z = -2

2x − 3 + z + z = 9 → 2x + 2z = 12 → x + z = 6

Add the equations to eliminate z.

2x = 4

x = 2

Therefore, z = 4 and y = -1.

Ann [662]3 years ago
5 0
Just use photomath that’s easier
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6 0
4 years ago
Will 50,48 and 14 form a right triangle​
alexgriva [62]

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3 years ago
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- Aidan buys used bicycles, fixes them up, and sells them. His average cost to buy and fix each bicycle is $27. He also incurred
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3 0
3 years ago
Quadrilateral ABCD is inscribed. The measure of ZA = 67º. What is the measure of ZC?
Luda [366]

Answer:

m<C = 113°

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m<A = 67° (given)

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This implies that:

m<A + m<C = 180°

Substitute

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7 0
3 years ago
Please answer this question now
Ivan

Answer:

Approximately 439.6 square millimeters.

Step-by-step explanation:

The formula for the surface area of a cone is the following:

A=\pi r^2+\pi r l

Where, <em>r </em>is the radius and <em>l</em> is the slant height.

The radius is 7 and the slant height is 13. We also use 3.14 for π Thus:

A=(3.14)(7)^2+(3.14)(7)(13)\\\text{Use a Calculator}\\A\approx 439.6

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3 years ago
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