For every 1 person that has the flu, 6 have a cold. That totals 7 people who are ill.
If the doctor sees 49 patients then 1 in 7 have the flu (7) and 6 in 7 have a cold (42)
1 : 6 => 7 : 42
Let the length be x and the width be w
The perimeter will be:
2x+3w=1500
thus
3w=(1500-2x)
w=(1500-2x)/3
w=500-2/3x
The area will be:
A=x*w
A=x(500-2/3x)
A=500x-(2/3)x²
The above is a quadratic equation; thus finding the axis of symmetry we will evaluate for the value of x that will give us maximum area.
Axis of symmetry:
x=-b/(2a)
from our equation:
a=(-2/3) and b=500
thus
x=-500/[2(-2/3)]
x=375
the length will be 375 m
The width will be 250 m
Answer:
D
Step-by-step explanation:
Domain - Y
Range - X
Since the domain stops at -4 and goes back up in the parabola, but the Range never stops (the arrows on the ends), the answer is D
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Step-by-step explanation:
