The first notes, little ascending and descending signs written above the words, were called

Musical notation is a way of having to write down music in a way of allowing one to play it and that systems are used and associated by in in order to use it in writing music.

164 kids

165 adults

step-by-step explanation:

first you need to make two equations

kids = x

adults = y

first equation = x+y=329

second equation = 1.5x + 4y = 906

solve by substitution

x = 329 - y

1.5 (329 - y) + 4 y = 906

493.5 - 1.5y + 4y = 906

combine like terms

2.5y = 412.5

y = 165

plug back into one of the equations

x + 165 = 329

x = 164

the graphs indicate that few people in bolivia work in industry, as that is the least expressive sector shown in the respective graphic.