Solve the system of equations by substitution. what is the solution for x? . 2x + y = 1. 4x + 2y = −1. x = 0. x = 2. there is no x value as there is no solution..

y=11,x=8

Step-by-step explanation:

2x+y=1

4x+2y=-1

substitution method

y=2x-1

4x+2(2x-1)=1

4x+4x-2=1

8x-2=1

8x=1

x=8

equation 2

4x+2y=-1

4(8)+3y=-1

32+3y=-1

-33=3y

y=11

30 people weigh 160 pounds or more

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