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Define x :
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Let the number be x.
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Construct Equation:
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x ÷ (-10) = -30
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Multiply for (-10) on both sides:
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x = (-30) x (-10) = 300
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Answer: x = 300
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Answer:
A
Step-by-step explanation:
Answer:
In 1981 was the building worth double it’s value.
Step-by-step explanation:
Given : A townhouse in San Francisco was purchased for $80,000 in 1975. The appreciation of the building is modeled by the equation :
, where t represents time in years.
To find : In what year was the building worth double it’s value in 1975?
Solution :
The amount is $80,000.
The building worth double it’s value in 1975.
i.e. amount became A=2(80000).
Substitute in the model,



Taking log both side,



i.e. Approx in 6 years.
So, 1975+6=1981
Therefore, in 1981 was the building worth double it’s value.
-3(2x+y) im not great at this but you can checm if its right or not