A technician services mailing machines at companies in the Phoenix area. Depending on the type of malfunction, the service call can take 1, 2, 3, or 4 hours. The different types of malfunctions occur at the same frequency (i. e., any service call will need either 1 hour or 2 hours or 3 hours or 4 hours with equal chance). Do not round your answers.1. Develop a probability distribution for the duration of a service call. Let X be the random variable for the duration of a service call and f(X) be the probability distribution

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

answer: 12   they all have at least 28 days

step-by-step explanation: haha

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this