A sector of a circle as shown in the figure, with angle at the centre equal to 120° has been cut from a circular lamina of radiu
s 21 CM. show that the perimeter of the remaining portion of the lamina is 130 cm .
(solve the sum step by step)
(solve the sum step by step)
1 answer:
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Answer:
Option D.
Step-by-step explanation:
using a graphing tool
Graph and determine the vertex in each case
we know that
If the equation has a maximum value at x=-2, then the x-coordinate of the vertex must be equal to -2 and the parabola open downward
case A)
The vertex is the point
case B)
The vertex is the point
case C)
The vertex is the point
case D)
The vertex is the point -------> is the answer
see the attached figure
Answer:
<h2><em><u>-15</u></em></h2>Step-by-step explanation:
= 10 - 2 × 15 + 5
= 10 - 30 + 5
= 15 - 30
=<em><u> -15 (Ans)</u></em>