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Mashutka [201]
3 years ago
12

Factor 81p² - 1 a. (3p+1) (9p-1) b. (9p+1) (p-1) c. (9p+1) (9p-9) d. (9p+1) (9p-1)

Mathematics
1 answer:
Alex73 [517]3 years ago
3 0

Answer:

d

Step-by-step explanation:

81p^2 - 1

9^2 p^2 - 1= (9p+1)(9p-1)

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In the Stone Ridge apartment complex 35% of the apartments have one bedroom if there are 49 one bedroom apartments what is the t
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Answer:

140

Step-by-step explanation:

Given:

In the Stone Ridge apartment complex 35% of the apartments have one bedroom.

If there are 49 one bedroom apartments.

Question asked:

What is the total number of apartments at Stone ridge ?

Solution:

<u>Let total number of apartments at Stone ridge</u> = x

Now according to question:

35% of the total apartments having one bedroom = 49

35\%\ of x = 49

\frac{35}{100}\times x = 49

\frac{35x}{100} = 49

By cross multiplication:

35x = 49\times100\\35x= 4900\\

By dividing both sides by 35

\frac{35x}{35} = \frac{4900}{35} \\x = 140

Therefore, total number of apartments at Stone ridge is 140

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