Which equations are true for the values of x, y, and z? Select three options.

2 lines intersect to form 4 angles. Clockwise, from top, the angles are: 65 degrees, x, y, z.
x degrees + 65 degrees = 180 degrees
x degrees = z degrees
y degrees = 65 degrees
x degrees= 65 degrees
x degrees + y degrees + z degrees = 115 degrees

In factoring by grouping, what would you have for step 3 for the following? step 1: x^3 +5x^2 +4x+20 step 2: x^2 (x+5)+4(x+5) step 3: ?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

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?