I dont get these questions on math help i give brainliest

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

The mean average cost of standard room per night at a hostel is ? 20.60. therefore, how much does a standard room cost per night at night-time rest days?