Answer:
X= 61 and Y = 34
Step-by-step explanation:
In a rectangle, sine opposite sides are equal, so
3x +21 = 6y and 6y-y = 2x +20
3x - 6y = -21 and 2x -5y = 20
Solve both equation, we get
Y = 34 and X= 61
Answer:
A
Step-by-step explanation:
Given the exponential function
f(t) = 228
← where t is time in years
Substitute t = 20 into f(t), that is
f(20) = 228 × 
= 228 × 0.60268.... ≈ 137 → A
The answer to this question is A. 12
