Answer:
C. x+y = 1 and -x-y = -1
Step-by-step explanation:
Remember that if a system of equations has an infinite number of solutions, then the resulting equation from using the first step of the elimination method would have no variables and would be true.
1) Let's try canceling out the equations in option C, x+y =-1 and -x-y =-1. Add the two equations together. (Work shown in attached picture.)
2) All of the terms cancel out with each other, leaving only a true statement of 0 = 0. Thus, option C is the answer.
Each bullet would cost 100/80 = $1.25 if 100 bullets cost $80.
Answer: y= 3x
Step-by-step explanation:
1. The question lack info
The expressions which represents the slope of a tangent to the curve
at any point (x, y) are:

<h3>The slope of a tangent to the curve.</h3>
Mathematically, the slope of a tangent line to the curve is given by this equation:

Given the function:

When (x + h), we have:

Next, we would find the derivative of f(x):

Read more on slope of a tangent here: brainly.com/question/26015157
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Isolate the variable:
Add -8 on both sides then you’ll have
- 1/3n < -17
Divide -1/3 on both sides or multiply -3 on both sides:
n < 51