The mean number of merits in a class of29 students is45 . A new student joins the class, and after a few weeks the mean number of merits of the 30 students is44 . Only the new student got merits during these few weeks. How many merits does the new student have? merits

Which of the following is correct interpretation of the expression -4+13

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so