3 years ago

I need help with number 8 and 9 someone please help ASAP

Mathematics

1 answer:

vichka [17]3 years ago

7 0

I just know #8 but it's c

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Step-by-step explanation:

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3 years ago

If m varies directly as v² and m =3, when v=2, calculate the value of m when v=9

KonstantinChe [14]

Answer:

m=243/4 when v=9.

Step-by-step explanation:

We know that when y varies directly with x², the formula of direct proportion is

y=kx²

where 'k' is the constant of variation.

As m varies directly with v², and m=3 when v=2

m=kv²

k=m/v²

= 3/(2)²

=3/4

Hence, k=3/4

so when v=9 then the expression becomes

m=kv²

substituting v=9 and k=3/4

m= 3/4(9)²

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Therefore, m=243/4 when v=9.

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3 years ago