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koban [17]
3 years ago
11

The area of a rectangle is represented by 5x^2+19x+12. What is the length?

Mathematics
1 answer:
prisoha [69]3 years ago
7 0
5x^2+19x+12=5x^2+15x+4x+12=5x(x+3)+4(x+3)\\\\=(x+3)(5x+4)\\\\Answer:x+3\ \times\ 5x+4
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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.

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Now you can put your value of C into this equation and find A. Remember, π is about 3.1416.
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9514 1404 393

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