The first thing we are going to do for this case is define variables.
We have then:
x: number of gallons of water
y: total weight
We then have an equation of the form:

Where,

Substituting values:

We choose an ordered pair:

Substituting values:

Rewriting:
Answer:
y = 8.34x + 30
1/u = 1/f -1/v
1/v = 1/u + 1/f
Answer:
y=130°
Step-by-step explanation:
180-(90+40)
180-130
50°
y=180°-50°
=130°
8 brownies divided by 5 people=8/5=1 3/5