Answer:
the sum of a number and eleven
Explanation:
y + 11
eleven (11) multiplied (·) by a number (y) → 11·y
the factor ( for example x) of a number(y) and eleven (11) → x · ( 11y)
a number(y) decreased(-) by eleven(11) → y - 11
the ratio (/) of eleven(11) and a number (y) → 11/y
the sum (+) of a number ( y ) and eleven (11) → y +11