For the following system, use the second equation to make a substitution for y in the first equation. 3x + y = 1 y + 4 = 5x What is the resulting equation? 1. 3x + 5x - 4 = 1 2. 3x + 4 - 5x = 1 3. 3x + 5x + 4 = 1

The answer is A.

Step-by-step explanation:

So we have the two equations:

To make a substitution of the second equation into the first equation, we need to isolate the y variable in the second equation. Thus:

Now, we can substitute this into the first equation. Therefore:

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d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: