If the perimeter of an equilateral triangle is represented by 6x-9, the length of a side of this triangle can be expressed as
A X-9
B 2x - 3
С 3х – 3
D x

3x + 4y = 5 x- 3y = -7 solve by substitution

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0

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?