Answer:
x +2y = 12
Step-by-step explanation:
Try the given points in the given equations and see what works.
-2x + 5y at (2, 5) is -2(2) +5(5) = 21 ≠ 12
) +) 2x + y at (2, 5) = 2(2) +(5) = 9 ≠ 12
x + 2y at (2, 5) = 2 +2(5) = 12 . . . . . goes through first point
x + 2y at (4, 4) = 4 + 2(4) = 12 . . . . goes through second point
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You know the answer at this point, so the next check is just for "completeness." It is not necessary to properly answer the question.
-x +2y at (2, 5) = -(2) +2(5) = 8 . . . . goes through first point
-x +2y at (4, 4) = -(4) + 4(4) = 4 ≠ 8 . . . does not go through second point
The answer is D that’s just yea cuz 25-25% is 18.75 and that times 3 is d
Answer:
about 81 years
Step-by-step explanation:
A graphing calculator can give you the answer easily.
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You can solve the problem algebraically by putting in the given number and solving for t.
30000 = 32000/(1 +12.8e^(-.065t))
12.8e^(-.065t) = (32000/30000) -1 = 1/15
e^(-.065t) = 1/(15·12.8) = 1/192 . . . . . divide by 12.8
-0.065t = ln(1/192) ≈ -5.257 . . . . . . take the natural log
t = -5.257/-0.065 ≈ 80.88 . . . . . . . .divide by the coefficient of t
It will take about 81 years for the number of trees to reach 30,000.
-4g + 12 = 16 then -12 on the both side
-4g = 4 then divided by -4, you will get g = -1