Let's assume
x be the number of loads by land carriers
y be the number of loads by air carriers
so, maximum number of loads can be 150
total number of loads =(the number of loads by land carriers)+(the number of loads by air carriers)
so, we get
![x+y\leq 150](https://img.qammunity.org/2019/formulas/mathematics/high-school/30hj5fi9td45co3cmuxfjzrshab673vslq.png)
the mail is sent via ground in air each land carrier takes 2000 pieces per load
so, total number of pieces by land =2000x
each air carrier takes 1500 pieces per load the
so, total number of pieces by air =1500y
total number of pieces = (total number of pieces by land)+(total number of pieces by air)
now, we can plug values
total number of pieces =2000x+1500y
A mail distribution center processes as many as 175000 pieces of mail each day
so, we get
![2000x+1500y\leq 175000](https://img.qammunity.org/2019/formulas/mathematics/high-school/qzfviw4da0zdrcb3uv08s2minai52gydr9.png)
so, we get system of inequality as
![x+y\leq 150](https://img.qammunity.org/2019/formulas/mathematics/high-school/30hj5fi9td45co3cmuxfjzrshab673vslq.png)
................Answer