Answer:
8
Step-by-step explanation:
Exponential decay is expressed by an equation of the form:
A = P(1 - r)^t
where P = initial value, r = annual rate of decay, t = time in years
A = 200(1 - 0.80)^2
A = 8
Answer: = 
Step-by-step explanation:
First, Combine Like Terms:
= 3x^2 + −5x^2 + 4x^2
=(3x^2+ −5x^2 + 4x^2)
=2x^2
* Hopefully this helps:) Mark me the brainliest:)!!
<em>~ 234483279c20~ </em>
<h3>
Answers:</h3><h3>
x = 12</h3><h3>
Angle B = 45 degrees</h3>
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Explanation:
Angles A and B are alternate exterior angles.
Due to the parallel lines, alternate exterior angles are congruent
A = B
5x-15 = 2x+21
5x-2x = 21+15
3x = 36
x = 36/3
x = 12
Use this x value to find the measure of angle B
angle B = 2x+21
angle B = 2*12+21
angle B = 24+21
angle B = 45 degrees
As a check,
angle A = 5x-15
angle A = 5*12+15
angle A = 60-15
angle A = 45 degrees
Since A and B are both 45 degrees, this confirms the correct x value
I can’t tell if you want fraction or decimal so ima say 4/9
