At a middle school students in seventh grade want to conduct a survey on the most popular type of pet for students in the grade. The students want to make a generalization based on a sample Which describes how the sample should be chosen?

A: It must be non-random

B: It must be representative

C: It must be selected by a student not in seventh grade

D: It must be selected to include students from each grade of the middle school.

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

logv3(x+2)=1

rewrite in exponential form:

logb(x) = y is equal to b^y =x

b = 3, y = 1

now solve for x:

3^1 = x+2)

x = 3-2

x = 1

see the picture for the graph.

a 270° rotation about point p says on e d g e n u it y (had to space it out because it says it's a misspelling so i couldn't submit it

2/3x + 7 = 29

step-by-step explanation:

two thirds = 2/3

plus a number = x

at least 29 = 29

there for you should get 2/3x + 7 = 29