See, these are mixed fractions and you need to solve them to improper fractions to get answer .......
so to change them to improper fractions we will multiply the denominator with the whole number then add the numberator to the product!
5 3/4 + 4 3/4
= 4*5+3/4 + 4*3+3/4
= 23/4 + 15/4
now just add them, tell me if you cant do it.......i'll help you!
+11912 
