Answer:
18 units.
Step-by-step explanation:
If you plot the points on a graph then you can clearly see where point D goes, (-2, 3). Then, you can find the side length, which is 4.5 units. Multiply that by 4 and you get 18 units.
It will be 7 seconds because you need to find out one, how many feet you can do per second and that number is 3. Therefore you can do 21/3 and you get an answer of 7. Hope this helped! ♀️
The answer should be D.
Hope it helped you.
X + 9 = 16
explanation : he bought nine more coins which made it 16. to find out how many coins he sold you would solve the equation then divide by 2.
x > -3 and x < 4
in interval notation

>; < - a open circle on the number line and the parenthesis ( or )
≥; ≤ - a filled-in circle on the number line and the parenthesis [ or ]