Answer:
The monthly cost for 45 minutes is $18.42
Step-by-step explanation:
Let
x -----> the total calling time in minutes
y ----> the monthly cost in dollars
we have the ordered pairs
(42,18.15) and (90,22.47)
step 1
Find the slope
The formula to calculate the slope between two points is equal to
substitute the values
step 2
Find the linear equation in point slope form

we have

substitute

step 3
Find the monthly cost for 45 minutes of calls
For x=45 min
substitute the value of x in the linear equation and solve for y





therefore
The monthly cost for 45 minutes is $18.42
Answer:

Step-by-step explanation:
Given.
The area of smaller version drawing is 
The Scale of the drawing is 2 in : 1 ft
Therefore, the area of actual picture on the wall.


So, the area of actual picture on the wall is 12 square feet.
Answer:
4.4
Step-by-step explanation:
hope this helps
Can't see the graph, but it should look something like this:
Answer:
9.53 cm2
Step-by-step explanation:
hope it helps
Here is the solution: