3 years ago

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Mathematics

1 answer:

Nuetrik [128]3 years ago

5 0

Answer:

I don't know 9,2

Step-by-step explanation:

9,2

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$\sf~x=3y+2$
$\sf~x+y=22$

Re-arrange the 2nd equation:

$\sf~x+y=22$

Subtract y to both sides:

$\sf~x=-y+22$

Plug in -y + 22 for 'x' in the first equation.

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$\sf~-y+22=3y+2$

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$\sf~y=\boxed{\sf5}$

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3 years ago

The diameter of Jen’s bicycle tire is 30cm. About how many revolutions will her tire make in a 20,000 cm journey?( Use pi =3.14

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213

Step-by-step explanation:

The circumference of the wheel is given by

C=2πr=πd

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The number of revolutions N multiplied by circumference should yield the total distance

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Given distance of 20, 000 cm and diameter of 30 cm

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