-2 1/3 - (-5) =??????
2 answers:
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Answer:
Step-by-step explanation:
Given
See attachment for ski trails
Required
Total length of ski trails
From the attached figure, there are 3 skis with length
So:
The total length is:
Express fraction as improper fraction
max is at vertex
in form
the x value of the vertex is
given,
a=6, b=0
the x value of the vertex is -0/(2*6)=0
the y value is
so vertex is at (0,-1)
since the value of a is positive, the parabola opens up and the vertex is a minimum value of the function
therefore that value is the smallest value the function can be
domain=numbesr you can use for x
range=numbesr you get out of inputting the domain
domain=all real numbers
range is {y | y≥-1} since y=-1 is the minimum