Sound can travel incredibly quickly: 1 mile in about 1/12 of a minute. Based on that, what is the apporoximate speed of sound

what is all that apply?

given the equation is 8+9z=-6, the first step would be to subtract the 8 from both sides:

8+9z-8=-6-8

since 8 minus 8 = 0, this would cancel out the 8. and since -6 minus 8 equals -14, the equation would look like this

9z = -14

(-infinity,infinity)