Conjugations of verbs for the formal "you" in Spanish are the same as for the subjects el and ella; in present tense, they usually end in -a.
The option you have checked is in past tense ("I bought this"); the present tense conjugation is compra.
Usted compra esto.
Again, the conjugation of verbs for the formal "you" in present tense almost always end in the letter "a"; the correct conjugation is estudia.
Usted estudia <span>matemáticas.</span>
<span>The ritual of strolling leisurely around a walkway is called a promenade. The word prom is derived from the word promenade. During a prom, people dress up and display themselves socially, just as people do when they go to a plaza in the Spanish speaking place.</span>
Words that end with an A are feminine, words ending in O are masculine