Answer: [tex]3\frac{19}{20}[/tex]
Turn 1 3/4 into an Improper Fraction
Multiply 1*4 and get 4. Now add 3 and get 7.
1 3/4=7/4
Turn 2 1/5 into an Improper Fraction
Multiply 2*5 and get 10. Now add 1 and get 11.
2 1/5=11/5
New Problem: 7/4+11/5
Add
[tex]7/4+11/5=79/20[/tex]
Simplify
[tex]79/20=3\frac{19}{20}[/tex]