The middle school choir concert was 1 1/4 hours long. Each song was 1/8 of an hour. How many songs did the audience hear during the choir concert?

10

Step-by-step explanation:

let s = total songs sung at the concert

If it took 1/8 to sing one song, it would take 1/8 x s hours to sing s songs

=

1/8 s = 5/4

Divide both sides of the equation by 8

s = 5/4 x 8

s = 10

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.