John played a note on his tuba that vibrated the air 120 times per
second. if he played the note for 4 seconds, how many times did
the air vibrate?

480 times

Step-by-step explanation:

per second=120

4 seconds=?

120 x 4 = 480

480

Step-by-step explanation:

12*4=48

put a zero on the end and you get:

480

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.