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icang [17]
2 years ago
7

Multiply each equation by a number that produces opposite

Mathematics
1 answer:
OLga [1]2 years ago
6 0

Answer:

Step-by-step explanation:

We could multiply the first equation by -3 and, separately, multiply the second equation by 4.  The result would be:

-12x - 15y = -21

12x  - 8y = -48

the x terms now cancel.  The result is:

- 15y = -21

- 8y = -48

----------------

-23y = -69, or y = 3.  If y = 3, then 3x - 2y = -12 becomes:

3x - 2(3) = -12, or

3x - 6 = -12, or    3x = -6, and so x = -2.

The solution is (-2, 3).

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I think we're not supposed to do more than 3 problems in one answer; certainly not five pages. Does the 1/3 mean there are 10 more to come?

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6)

Right triangle, opposite side of 10, adjacent side of 21,

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3 years ago
How many of these figures have at least one vertex?
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