18.
If z = (5)(11)(28)(38), what is the
greatest prime factor of z?
A. 5
B. 7
C. 11
D. 13
E. 19

  E.  19

Step-by-step explanation:

  z = (5)(11)(2·2·7)(2·19)

  z = 2³·5·7·11·19

The greatest prime factor is 19.

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

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