this is how i would solve this problem. I hope it's helpful
Answer:
b = 13
Explanation:
(3)(8)=11+b
Step 1: Simplify both sides of the equation.
(3)(8)=11+b
24=11+b
24=b+11
Step 2: Flip the equation.
b+11=24
Step 3: Subtract 11 from both sides.
b+11−11=24−11
b=13
notice the equations in slope-intercept form, the first one has a slope of -1, the second one has a slope of 1.
if the slopes are equal, and the constant is different, they lines are parallel.
if the slopes are equal, and the constant is the same the equations are exactly the same thing, and the lines are coincident, on slapped on top of the other.
if the slopes differ, like here, then they have a solution, where they
intersect.
D. 50 mph
Going upstream takes longer because of the flow of the water
There is little context to go off of but the answer should be variable