Let X be the number of months between successive doctor visits. Let X have the following CDF: F(x) = 8>>>>>>>>&g t;< >>>>>>>>> ;: 0 x < 1 :30 1 x < 3 :42 3 x < 4 :69 4 x < 6 :81 6 x < 12 1 x 12 a) Using just the CDF, compute P(3 X 6) and P(X 4). b) What is the expected value of X?

it's d.

step-by-step explanation:

because: -1(4x + 1y) +2 (1x-3y) distribute each number into the parenthesis.

then you would get: -4x - 1y + 2x -6y combine like terms

and get: 2x -7y

hope my answer has you if not then i'm sorry.

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

50

step-by-step explanation: