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777dan777 [17]
3 years ago
15

Help me with this algebra nation problem

Mathematics
1 answer:
Sergio [31]3 years ago
6 0

Answer:

  $295,245

Step-by-step explanation:

Each year the value is 0.9 times what it was the year before. After 5 years, the value is ...

  $500,000 × 0.9^5 = $295,245

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Hey, just trying finish up some math before school ends. What's the answer to 3n+2(-2n-1) ? Thanks!
Ksju [112]

Answer:

-n - 2

Step-by-step explanation:

3n+2(-2n-1)

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Y=mx+b

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8 0
3 years ago
A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at
vitfil [10]

Complete question

A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at 7 meters per minute. At a certain instant, the bottom of the ladder is 21 meters from the wall.

What is the rate of change of the distance between the bottom of the ladder and the wall at that instant(in meters per minute)

Answer:

\frac{dx}{dt}=11.94m/min

Step-by-step explanation:

From the question we are told that

Slant height z=29m

Change in Vertical height  \triangle y=7m/s

Horizontal length x=21

Generally in finding the distance form the  top to the bottom of the wall it is mathematically given by

 x^2+y^2=z^2

 21^2+y^2=29^2

 y^2=29^2+21^2

 y=35.81

Generally solving for the differential equation is mathematically represented as

 x^2+y^2=29^2

 2x*\frac{dx}{dt} +2y*\frac{dy}{dt} =0

 x*\frac{dx}{dt} +y*\frac{dy}{dt} =0

 (21)*\frac{dx}{dt} +(35.81)*(-7) =0

 (21)*\frac{dx}{dt} -250.64 =0

 \frac{dx}{dt}=\frac{250.64}{21}

 \frac{dx}{dt}=11.94m/min

5 0
3 years ago
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