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Alexxx [7]
3 years ago
13

Mr. Porter owns a house. When he first bought the house it was valued at d dollars. Since then, the value of the house has incre

ased. Mr. Porter writes the equation below to express the current value of his house. d + 0.21d = 1.21d Mr. Porter claims that the value of his house has increased by 121%, since 1.21 is equal to 121%. Decide if Mr. Porter is correct. If he is correct, enter 121 below. If he is not correct, enter the correct percent increase.
Mathematics
2 answers:
Tamiku [17]3 years ago
6 0
In Mr. Porter's equation the initial "d" represents the initial value of the house. The term "+0.21d" represents the increase in value, 21% of its original value (d).

The correct percentage increase is 21%.
kirill115 [55]3 years ago
5 0

Answer:

His claim is wrong as the percent increase is 21%.

Step-by-step explanation:

The given expression is:

d+0.21d=1.21d

Given is that at the time of purchase, the house it was valued at 'd' dollars.

So, original price (d) plus percent increase on original price (0.21d) equals to current price (1.21d)

We can see that the percent increase was 21%.

Mr. Porter claims that the value of his house has increased by 121%, since 1.21 is equal to 121%.

His claim is wrong as the percent increase is 21%.

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Strike441 [17]

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<h3>What is the sum of the average monthly rainfall?</h3><h3 />

The average can be found by adding up the monthly rainfall and dividing by 12 months.

Solving gives:

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2 years ago
At a school, 40% of the sixth-grade students said that hip-hop is their favorite kind of music. If 100 sixth-grade students pref
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7 0
3 years ago
The altitude in feet of a plan minutes after is given by =3400 +600. How many after liftoff is the plane at an altitude of 21,00
nekit [7.7K]
A= 3400t + 600 | given formula
21000= 3400t + 600 | substitute the altitude into the formula
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3 years ago
What is the value of 3x^2 + 5x + 25, when x = 3<br> (3x^2 means 3x squared)
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8 0
2 years ago
The altitude a ( in feet) of a plane t minutes after lift off is given by a=3400t+600
Julli [10]

Answer:

  6 minutes

Step-by-step explanation:

'a' in the formula represents altitude in feet. You are told the altitude is 21000 feet, so put that into the formula:

   21000 = 3400t +600

You can solve this for t:

  20400 = 3400t . . . . . subtract 600 from both sides

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The problem statement tells you that t represents minutes after lift off, so this solution means the altitude is 21000 feet 6 minutes after lift off.

The question is asking for the number of minutes after lift off that the plane reaches an altitude of 21000 feet, so this answers the question directly:

  The plane is at an altitude of 21000 feet 6 minutes after lift off.

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3 years ago
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