X−y−z=0 and y=x+z. Based on these equations, which of the following must be equal to z?

z=0

Step-by-step explanation:

We have,

x−y−z=0 .....(1)

and

y=x+z ....(2)

Equation (1) can be written as : x-y = z ....(3)

and

Equation () can be written as : y-x=z ....(4)

From (3) and (4) we have:

Put x=y in equation (1). So,

z=0

So, the value of z is equal to 0.

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)