Yes, sum means the answer to an addition problem. So the sum of 22 and 9 means 22+9. 22+9=31. I hope this helps :)
Answer:
The rule for a line whose gradient is -4 and y-intercept = 8 is

Step-by-step explanation:
Equation of line slope intercept form is
------------- (1)
Where m is slope or gradient and b is y-intercept
<u>Here</u>

Substituting values in equation (1)

Answer:
433.6
Step-by-step explanation:
This is what it shows for the solution. Hope this helps.
The answer is ab cuz it’s measured in two units if that makes sense