Westonci.ca is the Q&A platform that connects you with experts who provide accurate and detailed answers. Our Q&A platform provides quick and trustworthy answers to your questions from experienced professionals in different areas of expertise. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

suppose a varies directly as b, and a=7 when b=2 find b when a =21

Sagot :

because α varies directley to β
[tex] \alpha = k \beta [/tex]
(k = constant)

α=7 when β=2
7= 2k
k= [tex] \frac{7}{2} [/tex]

so when α=21
21= [tex] \frac{7}{2} [/tex] b
b= 6