Answer: 1.1a +3.5b
Step-by-step explanation: You can combine the a’s because they are the same variable. 3.1a has a subtraction sign in front of it so when you combine it with 4.2a you’re actually subtract once 3.1 from 4.2 :)
The answer is 9, here are all the possible combinations...
road, road
road, bridge
road, ferry
bridge, bridge
bridge, ferry
bridge, road
ferry, ferry
ferry, bridge
ferry, boat
(or you can do 3 input combinations by 3 output combinations "3 x 3" = 9)
Cheers!
Answer:
x-intercept of the graph of the function
is, 
Step-by-step explanation:
Given the function:
......[1]
x-intercept defined as the graph crosses the x-axis.
Substitute value of y = 0 in [1] and solve for x;
or
Take the inverse cotangent of both sides of the equation and solve for x;
3x = arccot (0)
We know the exact value of 
then;

Divide both sides by 3 we get;

Since, the cotangent function is positive in the first and third quadrants.
The period of the function
is
so values will repeat every
radians in both directions.
we have;

Therefore, the x-intercept of the graph of the function
is ;
for every integer n;
Think of when If you cross two lines you get a point where they meet
A point is a solution.
So if the lines never cross, then they would have no point, or A, No Solution