a 50 kg box is pusher across the floor. if the acceleration of the box is 2.5m/s², what is the net force ecerted on the box

Mass=m=50kg

Acceleration =a=2.5m/s^2

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

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c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.