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aleksley [76]
3 years ago
15

I NEED HELP!!! Someone please help

Mathematics
1 answer:
Ulleksa [173]3 years ago
6 0
The best thing to do is figure out what we can deduce to isolate what we can't deduce.
The first answer is true because angles 1 and 8 are congruent by the Alternate Exterior Angles Theorem, which states that if two lines are congruent, it's alternate exterior angles are congruent.
The second answer is true by the Same-Side Interior Angles Theorem, which states that angles created by a transversal that are both in the interior of the transversal are congruent.
The third choice is incorrect, and we know this is true because the previous theorem we used (Same Side Interior Angles) is shown again, but with different angles. Therefore, Choice C is incorrect, and therefore your answer.

(As a side note, Choice D is correct, but a short proof must be written to prove this, as it is not defined by a single postulate or theorem).

:)
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Answer:

Multiply equation 4x+5y=62 by 5 and 5x-3y=22 by 4

Step-by-step explanation:

Given:

Equations are 4x+5y=62,5x-3y=22

To find: constant by which each equation should be multiplied to eliminate the variable x in the given system of equations

Solution:

4x+5y=62...(i)\\5x-3y=22...(ii)

Multiply equation (i) by 5 and (ii) by 4 to get the following equations:

20x+25y=310\\20x-12y=88

On subtracting these equations, we get

(20x+25y)-(20x-12y)=310-88\\\\13y=222

So, the variable x gets eliminated

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