Answer:
Step-by-step explanation:
Let
x ----> the number of days
y ----> the amount of money remaining in dollars
we have the points
(2,12.10) and (5,2.50)
step 1
Find the slope m
The formula to calculate the slope between two points is equal to
substitute the values
----> is negative because is a decreasing function
step 2
Find the equation of the line in slope intercept form
where
m is the slope
b is the y-intercept
with the slope m and the point (2,12.10) find the value of b
substitute
solve for b
substitute
18 is the answerrrrrrrrrrrrrrrrr i th
Answer:
-15
Step-by-step explanation:
Cancel out each product, equalling as so.
The coefficient of a variable, unless otherwise specified, is assumed to be 1. variable have an "understood" coefficient of 1 because, for the variable to be listed, there must be at least one of it.