Select all the correct locations on the image.
The map shows the frequency of flood events in US counties between 1996 and 2003. Identify the places that might benefit from building dams, levees, and diversion canals.

For those that don't know the states by name....

The bottom left options are your answers

Alaska; Yukon River

California; Salton Sea

Arizona; Gila River

New Mexico & Texas; Pecos River

Explanation:

Leaving aside the Hudson River in N.Y.  and the Susquehanna River in Pennsylvania (a relatively low frequency of floods) the 4 states that would benefit enormly from building dams etc. because of their high frequency of flood events) are California, Arizona, New Mexico and Texas.

madagascar produces the most

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4