Which two simple machines are employed in a pair of scissors? lever and inclined plane a: lever and wedge b: wheel and axle and lever c: inclined plane and wedge d: description

I would say a lever and an Wedge due to the handle being a lever and blades being like a wedge.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

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