Answer:
Step-by-step explanation:
If
then
by combining like terms. (I'm thinking you might have mistyped the problem because this representation is weird).

I know the 3rd question the answer is rectangle
Answer:
2.) 2 orange marble in a raw
Step-by-step explanation:
because there are more orange marble than other colours
Answer:
x = 9
Step-by-step explanation:
2x - 1 + 1 = 17 + 1
2x = 18
(2x=18)/2
x = 9
To find range, you must find the largest number in your data, and subtract it by the smallest number in your data.
In this case...
the Largest (20) - smallest (0) = Range