Answer:
Some of the applications for exponential functions are:
1. model populations
2. carbon date artifacts
3. compound interest
hope this helps!
Answer:
28
Step-by-step explanation:
21 divided by 3 is 7, take that 7 and multiply it by the 4. Hope this helps!
Answer:
x=-1
Step-by-step explanation:
-4(-5x+2)-3x-5=-30
open the bracket
+20x-8-3x-5=-30
collect like terms
20x-3x-8-5=-30
17x=-30+13
17x= - 17
divide both sides by 17
x= -1
Unfortunately, I can't do it on a graph here, but I will do it algebraically.
The solution on the graph will be the point of intersection of the two lines representing the equations.
y + 2.3 = 0.45x . . . . . (1)
-2y = 4.2x - 7.8 . . . . . (2)
From (2), y = 3.9 - 2.1x
substituting for y in (1), we have:
3.9 - 2.1x + 2.3 = 0.45x
2.55x = 6.2
x = 6.2/2.55 = 2.4
y = 3.9 - 2.1(2.4) = 3.9 - 5.04 = -1.2
Therefore, solution is (2.4, -1.2)
Answer:
r = -6
Step-by-step explanation:
Equation of a line:
The equation of a line has the following format:
In which m is the slope and b is the y-intercept.
Slope 3/4
This means that 
, and thus:
(6,3)
This means that when 
. We use this to find b. So
So
(-6, r)
r is y when 
. So
So r = -6.
