Four pipes
can fill a tank in 70 minutes. How long will it take to fill the tank by 7 pipes ?​

40 minutes

Step-by-step explanation:

step-by-step explanation:

if x = 2 you have to find x to finish the problem

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|