Question

if x and 3.5y vary directly and x=7 when y=10 find x when y=15​

Answer 1

Answer:

Explanation:

the initial statement is

x

∝

y

to convert to an equation multiply by k the constant

of variation

⇒

x

=

k

y

to find k use the given condition

x

=

5

when

y

=

15

x

=

k

y

⇒

k

=

x/y

=

5/15

=

1/3

Step-by-step explanation:

hope it help s you dear

Answer 2

Step-by-step explanation:

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