Sophie earns $7 an hour babysitting and $8 an hour for cleaning the house last week she babysat for 3 hours and clean for 2 hour
1 answer:
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Answer:
The graph is positive and decreasing for all real values of x where x < -1
Step-by-step explanation:
we have
The function is a vertical parabola open up
The roots (x-intercepts) are x=3 and x=-1
The vertex is the point (1,-4 ) is a minimum
using a graphing tool
see the attached figure
we know that
In the interval (-∞,-1) ---> the function is positive and decreasing
In the interval (-1,1) ---> the function is negative and decreasing
In the interval (1,3) ---> the function is negative and increasing
In the interval (3,∞) ---> the function is positive and increasing
therefore
The graph is positive and decreasing for all real values of x where x < -1
Answer:
Step-by-step explanation:
The given function is
Observe that, the first two factors are from difference of two squares.
We expand the brackets using the distributive property to obtain;
The above function is now in standard form, since the terms are arranged in descending powers of .