Identifying an Error
A student estimated the sum
7.95 + 8.11 + 78.5 +8.05 + 79.4 +0.815 as:
All the numbers begin with a 7 or 8, so use cluster
estimation
8-8-80-8-80-0.8 = 184.8
Explain why this reasoning is not accurate.

i’m sorry but i don’t know sorry

answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.

the clb she uses is a driver, so its a 2/5 chance she hits a 180-189 yard shot

step-by-step explanation:

there were only 2 presidents that were under the age of 45. theodore roosevelt, and jfk, that makes 5%