Find the average of 23 and −7.

8

Step-by-step explanation:

23 + (-7) =16

16/2 = 8

8

Step-by-step explanation:

23+(-7) = 16/2 = 8

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

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