4. A number decreased by 10 is greater than -5.
15. A number increased by 1 is less than 9.
16. Seven more than a number is less than or equal to -18.
17. Twenty less than a number is at least 15.
18. A number plus 2 is at most 1.

Question

4. A number decreased by 10 is greater than -5. 
15. A number increased by 1 is less than 9. 
16. Seven more than a number is less than or equal to -18. 
17. Twenty less than a number is at least 15. 
18. A number plus 2 is at most 1.

anonymous · Answer

follow the statment, rewrite it using the following substitutions.  A number will be x.  Decreased will be -.  Is greater than will be >.  That will give you x-10>-5.  Now you can solve by adding 10 to both sides of your inequality.  That will give you x>5