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This problem can be solved using proportions.

81 90
___ = ____


x 100






Cross-multiplication gives us


(81)(100) = 90x


8100 = 90x
____ ___

90 90




90 = x


The class consists of 90 students.

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โˆ™ 2009-12-04 20:51:38
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Algebra

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A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

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Q: There are 81 students that make up 90 percent of the class How many students in all?
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