there are 75 new houses being built in a neighborhood. last month 2/5 of them were sold. this month 1/5 of the remaining houses were sold. how many houses are left to be sold

30

Step-by-step explanation:

2/5+1/5=3/5 sold

1-3/5=2/5 unsold

2/5*75=150/5=30 houses left to sell

|7| + |-2| | +|5| + |-8|=

Step-by-step explanation:

We want to find the total number of spaces traveled, it doesn't matter whether they are forward or backward.

We moved 7 spaces right then 2 spaces left then 5 spaces right then 8 spaces left.  The total spaces are just the number of spaces, not whether they were left or right so we take the absolute value

|7| + |-2|  +|5| + |-8|=