How many solutions does the following equation have? [3x + 12]= 18

A. No solution
B. One solution
C. Two solutions
D. Infinitely many solutions

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?