Which lines are parellele

Line 1 and Line 4 are parallel lines

Solution:

General equation of a line:

y = mx + c

where m is the slope and c is the y-intercept of the line.

To find the slope of each line:

Line 1:

Slope

Line 2:

Add 7 on both sides, we get

Slope

Line 3:

Slope

Line 4:

Subtract x from both sides, we get

Multiply  by on both sides, we get

Slope

Two lines are parallel, if their slopes are equal.

From the above slopes,

Therefore Line 1 and Line 4 are parallel lines.

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