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Question from Amanda, a parent:
what is the area of a circle with a circumference of 3000 metres?
Amanda,
The area of a circle is given by the formula A = π r2, where A is the area and r is the radius. The circumference of a circle is C = 2 π r.
If we "solve for r" in the second equation, we have r = C / (2 π ). Now we use this to replace r in the first equation: A = π [ C / (2 π ) ]2.
When we simplify this, we get A = C2 / (4 π).
Now you can put your value of C into this equation and find A. Remember, π is about 3.1416.
Y=2
If you subtract 9-7 you get the answer 2 which makes y=2.
Step-by-step explanation:
perpendicular slope is negative reciprocal. -1/-1 = 1
y - 4 = x +3
y = x + 7
Answer:
Shade above 2x + y = 4.
Shade below 2x + y = 4.
Shade above 2y = 6 – 2x.
Shade below 2y = 6 – 2x.
Make the boundary line 2x + y = 4 dashed.
Step-by-step explanation:
