Which step is not necessary when solving this system of equations by graphing? [3x-y-4
Ix+y=-4

answer: 819.89 miles across america

step-by-step explanation:

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval

step-by-step explanation:

well if you round, things become much more simple. round 5.95 to 6, 4.25 to 4, and 1.05 to 1. now, add 6+4+1 and that would equal 11. so the items together would equal to about $11.