If the number of concerts held in a city is correlated to the number of local radio channels, what third variable might most likely be responsible for this correlation?

the number of songs played on each channel

the weather conditions of the city

the number of music lovers in the city

the duration of each concert

answer:

square

step-by-step explanation:

answer:

the correct answer is option d : 120°

step-by-step explanation:

first we bring all the cos x terms to one side

2 = 5 + 6 cos x

now we bring all the numerals to one side

-3 = 6 cos x

- = cos x

∵ cos 60° = ∴ cos x = cos 60°

x = 60°

now just flip over for the negative to get 180-60 = 120

∴ the answer is 120°.

answer:

options a and b

step-by-step explanation:

amplitude of the graph = 3 but   shown correctly

hence option a is right

there is a vertical shift of 1/2 down. shown correctly

option b is right

horizontal shift is 1 unit to the left after adjusting x for x/4.   shown incorrectly

option c is not right

period is 8 pi   not shown correctly

option d is wrong.

horizontal expansion is not shown at all for x/4

hence option e is wrong.