Answer:

Step-by-step explanation:
we know that
The equation of a exponential growth function is given by

where
P(t) is the population in Madison
t is the number of years
a is the initial value
b is the factor of growth
we have

substitute

X= my age
500-3x=230
500-3x-230=230-230
270-3x=0
270-3x+3x=0+3x
270=3x
270/3=3x/3
x=90
you are 90 years old
You would put 151 dollars in your account at October.
16+15+15+15+15+15+15+15+15+15=151
Start with

Multiply both sides by 3:

Recall that 21/5=4.2 to claim the correct answer.
Answer:
RQS=110
TQS=70
Step-by-step explanation:
(12x+2)+(7x+7)=180
The two equations added together give us a straight line which is angle 180
19x + 9 = 180
19x = 171
We solve for x
x = 9
Now that we have x we plus in to each equation
RQS= (12(9)+2)
= 110
TQS=(7(9)+7)
=70