write and evaluate the expression. Then, select the correct answer.

The sum of forty-five and a number;

evaluate when n = 1.1

45n; when n = 1.1, the value is 49.5.
45 + n; when n = 1.1, the value is 46.1.
45 – n ; when n = 1.1, the value is 43.9.
StartFraction n Over 45 EndFraction; when n = 1.1, the value is 0.024.