Which is the best first step when solving the following system of equations? x+y=3 and 4x-y=7 i need answer asap

I think it would be x+y=3

Hope this helps

B:Add the first equation to the second equation.

Step-by-step explanation:

about 0.75 hours

step-by-step explanation:

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies