. Calculaţi: a) 2 + (-5) + 10 + (-6);
b) (3 + 10)+(-3)+(-6);
c) -6 + 11 + (-2) + 6+ (-2);
d) (3 + 5) + (4) +(-2) + (-5);
e) (10+20 + 30) + 10 + 20 + (-30) + 10 + (-20) + (-40) + (-10)+(-30);
f) (30+50 +10) + 30+ (-50) +10 + 30 + 50 + (-10)+(-30) + 50 + (-10).
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Select the sequences that are geometric.

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?