, hurry ! shown below are the steps a student took to solve the simple interest formula a = p(1 + rt) for r.a = p(1 + rt)a = p+ rta - p= rtr = (a - p)/texplain the algebraic error in the student’s work. then, state how the equation can be modified to produce the correct result.

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.