3 years ago

Using elimination, what is the solution to the following system? x+y=4 x-y=8

Mathematics

1 answer:

aleksandr82 [10.1K]3 years ago

5 0

Answer:

x=6, y=-2. (6, -2).

Step-by-step explanation:

x+y=4

x-y=8

----------

2x=12

x=12/2

x=6

6+y=4

y=4-6

y=-2

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A telephone company charges a fixed monthly rate plus a rate per minute of usage. The company charges $155 for 100 minutes of us

torisob [31]

Answer:

The answer is D.

Step-by-step explanation:

As said in the problem, we are labeling the total minutes used <em>x </em>and the total monthly income as <em>y</em>. This means that in the graph we will be making the y-axis should represent the total monthly charges, and the x-axis should represent the total minutes.

Thus the graph should go through points (100,155) and (200,245) and its slope is:

$\frac{245-155}{200-100} =0.9.$