Brainliest + points

:

every night, the average human body experiences an increase in melatonin levels, and then every day the levels decrease.

is this an example of a periodic event? explain.

maybe - definition of supplementary angles. im not sure. sorry

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

i need points

step-by-step explanation:

sorry bubs