00:00 The bar diagram represents 24 hours in one day and shows a mark at 30%.
If you sleep 30% of the day, how many hours do you sleep? Enter your answer in the box.
24
0
Hours slept
Percent
09
30%
100%
hours

i think it is c, not positive though

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

thus, the first answer choice, y = sec x, is the correct one