Answer:
For b. 11*3x = 33x
For c. (3x-4)(11x-2) = 
Explanation:
For b. Since it is a rectangular the A = l*w
w = 11 & l = 3x => A = 11*3x = 33x
For c. Since it is a square we could assume that the A =
a side squared (since they all have the same length) but to be on the safe side, we'll assume it is not a square and do the math of multiplying one side by another (just like for a rectangle)
Side up = 3x + (-4) = 3x-4
Side left = 11x + (-2) = 11x-2
Side up * Side left = (3x-4)(11x-2) = 
6x^2 + 3xy - 2xy +y^2
6x^2 + xy + y^2
Answer:
1. Drainage Basin
2. mouth
3. discharge
4. headwaters
5. meanders.
6. floodplain
Explanation:
A drainage basin is an area where water from precipitation such as rainwater collects before draining into a water body such as a river.
A delta is created where the highest quantity of sediments are deposited at the mouth of a river.
A river's discharge is the quantity of water flowing through a channel in a river.
The headwaters of a river are the source of water of a river, and are usually the farthest point from where it joins/empties into another water body.
Meanders are common feature of A stream with a low to moderate gradient.
A river with a well-developed floodplain has a flat low-lying channel and floods when there is a high quantity of water flowing through the river.
Precisely 3.2 astronomical units.