What is the goal of a proof by contradiction?
2 answers:
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Answer:
Part A) The graph in the attached figure
Part B)
Step-by-step explanation:
Let
y------> the price of gas
x-----> the volume of gas purchase
we know that
The relationship between the cost of gas and the volume purchase represent a direct variation and remember that a relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
In this problem the constant of proportionality k is equal to
and the y-intercept b is equal to zero because the line passes through the origin
therefore
the linear equation is
using a graphing tool
see the attached figure
Answer:
-1 and -5
Step-by-step explanation:
You must account for negative u values (which the abs nullifies).
So and
is what we have to solve for.
As for usual equations, isolate the u variable.
5u + 15 = 10
5u + 15 (-15) = 10 (-15)
5u = -5
u = -1
Now you can do the same operation for the other equation and you should get u = -5.
Let's make sure we did it right by replacing u with one of our solutions (-1 or -5).
That's true. What about the other one?