anyataroo anyataroo

13-08-2018
Mathematics

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Suppose a varies directly as b, and a=21 when b=6. find a when b=28

Respuesta :

sarahwouters117 sarahwouters117

13-08-2018

Create a proportion to find the missing value of a.

[tex] \frac{21}{6} =\frac{a}{28} [/tex]

Use cross-multiplication to clear the fractions.

[tex] 21(28) = 6a [/tex]

[tex] 588=6a [/tex]

[tex] a=98 [/tex]

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