Answer:
594 rpm
Step-by-step explanation:
Two gears will have the same linear speed, so:
v₁ = v₂
ω₁ r₁ = ω₂ r₂
(316 rpm) (79) = ω (42)
ω ≈ 594 rpm
4-3x≥7
4-7≥3x
-3≥3x
or
3x≤-3
x≤-1
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Because a circle has infinite sides and it is almost impossible to be very accurate measuring around.
i think it is 87 because
first second third