Question

20 points!!
please show me how to do this for d + 4 < 7

Answer 1

Explanation:

`d+4<7`

Solve for d, by subtracting 4 from both sides.

`d+4-4<7-4`

`d<3`

To graph the solution, draw a number line, make a hollow circle on 3 and draw an arrow pointing left towards negative numbers. The circle has to be hollow because the solution does not include 3.

To check your work, substitude d for any number less than 3. In this case, let's try with 2.

`d+4<7\\2+4<7\\6<7`

This is true. 7 is greater than 6.