6. The human brain weighes about 1 pounds for each 100 pounds of body weight. What is the approximate weight of the brain of a person who weighs 85 pounds. Round to
the nearest ounce.
all

I did a proportion and I think the answer is 13.6 or 14 after being rounded

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

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