Answer:

Step-by-step explanation:
The average is 7.5 hours of sleep each night.
There are 365 nights in 1 year.



Answer:
idkim only 11
Step-by-step explanation:


in the given interval when

.

when

.
Answer:
y = - x + 13
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - 1, thus
y = - x + c ← is the partial equation
To find c substitute (9, 4) into the partial equation
4 = - 9 + c ⇒ c = 4 + 9 = 13
y = - x + 13 ← equation in slope- intercept form
Answer:
I don't known
Step-by-step explanation: