It is B because angle DBA is supplementary to angle DBE because together they create a straight line which equals 180 degrees.
Answer: 3 mi/h
Step-by-step explanation:
Here we have to find the speed 
at which Sarah walks to school, knowing the distance 
she has walked and the time 
she expends.
So, in this case we can use the following equation:
Where:
Solving:
This is Sarah's speed
I think it’s always because the absolute value is always positive.
Answer:
12 packages.
Step-by-step explanation:
Peaceful travel agency offers vacation packages.
Each vacation package include a city, a month and an airline.
The agency has 2 cities, 3 months and 2 airlines to choose from.
Agency can offer the number of different packages = 2 × 3 × 2
Answer:
Step-by-step explanation:
for y intercept
we calculate f(0) and the value is y intercept
for the slope we have 2 points (x1,y1) and (x2,y2)
the slope is (y2-y1)/(x2-x1)
