4. How do the unique topography (high and low elevation, canyons, valleys) and other characteristics (vegetation) in different Texas ecoregion affect the natural process of weathering, erosion, and deposition?

Just ask Siri.

She will pull it up I do that sometimes

2a+1b=27.50
4a+2b=59.50
Multiply first equation by -4 and the second by 2 so you can drop off the a values then add the equations together.  Then solve for b.  You should get b=6.

Then plug b into one of the original equations and solve for a and you should get 10.75

So a plate of spaghetti is $10.75 and a salad is $6.