Answer:
Explanation:
1)
Let the no. of houses = x
inequality:
146 + 23x > 590
23x > 590 - 146
x > 444 ÷ 23
x > 19.3
the smallest number is 20
2)
Let the no. of weeks = x
inequality:
9 + 2.5x ≤ 50
2.5x ≤ 50 - 9
x ≤ 41 ÷ 2.5
x ≤ 16.4
The number of weeks = 16
3)
x ≤ -1
Note: inequality uses sign <, >, ≤, ≥, not =