D is a function because there are no repeated x values
for example b is not a function because we have (0,-7) and (0,-9)
3x < -6
x < -6/3
x < -2
Therefore, the solution set is {x | x < -2}.
Answer:
I'm not good with the type of math on 3, so I'm going to answer 4. (P.S I don't know the question you're asking, so I'm going to assume you want to know the area and perimeter of the shapes.
Step-by-step explanation:
To solve number 4 I added the width of the 2 triangles to give me the width of the rectangle, so then 2 times 9 is 18. Then for the triangles. The formula for triangles is base times height divided by 2. So we add the areas of all shapes and we get: 18+6+24=48m. So the area for number 4 is 48 meters.
(hope this was your question)
Answer:
The answer will be A.
Step-by-step explanation:
