queenliz855

08.10.2019 • 

Mathematics

At a factory that produces pistons for cars, machine 1 produced satisfactory pistons and unsatisfactory pistons today. machine 2 produced satisfactory pistons and unsatisfactory pistons today. suppose that one piston from machine 1 and one piston from machine 2 are chosen at random from today's batch. what is the probability that the piston chosen from machine 1 is unsatisfactory and the piston chosen from machine 2 is satisfactory ?

Ответ:

tiarafaimealelei

05.01.2022

Mathematics

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I suspect that there's supposed to be a number before each "satisfactory" and each "unsatisfactory", and I'm pretty sure that none of them is there. The question, exactly as it's written, can't be answered.

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Ответ:

ronniethefun

17.07.2020

Mathematics

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(a + b) \: (a - b) = {a}^{2} - {b}^{2}

Step-by-step explanation:

this is an algebric identity ,

where,

it's derivation,

=》

=》

=》

because , + ab and -ab cancel out

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