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astra-53 [7]
3 years ago
15

N^3 is three times the square root of 81. What number is n?

Mathematics
1 answer:
Elena L [17]3 years ago
7 0
The answer is 27. The square root of 81 is 9 and 9 x 3 is equal to 27.
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The perimeter of a rectangle is found by using the formula P = 2l + 2w, where P is the perimeter, l is the length and w is the w
velikii [3]

Answer:

#1: 11 cm

#2: 16.5 in

#3: 2.5 feet

Step-by-step explanation:

#1

P=2l+2w Solve for width by substracting 2l on both sides to isolate 2w

P-2l=2w

or

2w=P-2l

Replace.

2w=26-2(2)\\2w=26-4\\2w=22\\w=\frac{22}{2}\\ w=11cm

----------------------------------------------------------------------------

#2

P=2l+2w

P=2(3.5)+2(4.75)\\P =7+9.5\\P=16.5in

----------------------------------------------------------------------------

#3

P=2l+2w

Solve for l

2l=P-2w\\2l=7-2(1)\\2l=7-2\\2l=5\\l=\frac{5}{2}\\ l=2.5feet

5 0
4 years ago
Suppose that 21 out of 25 people who apply to a certain college are accepted. What percentage of people who apply are accepted t
IgorC [24]

Answer:

84%

Step-by-step explanation:

The first step is to write 21 as a fraction of 25, which is simply

21/25

Now we just need to convert this fraction to a percentage :

21/25 = 84

So, 21 is 84% of 25

8 0
3 years ago
A city has 4 new houses for every 7 old houses. If there are 32 new houses in the city, how many old houses are there?
Maslowich

So the ration is 4:7

The total of houses is 32 new houses. What I did was I divided 32 by 4:

32/4 = 8

That means that the ratio (4:7) would be multiplied by 8 (only the :7 part):

7 * 8 = 56

There are 56 old houses (the ratio is now 32:56)

<em>Thank you and can you please give me brainly :3</em>

<em />

3 0
3 years ago
Q1. If ∛5x+10=5, Find x
aleksandrvk [35]

Answer:

\sqrt[3]{5x+10}=5 / ^{3}\\  5x+10=125\\5x=115/:5\\x=23

If you mean that :\sqrt[3]{5x}+10=5 this is

\sqrt[3]{5x}+10=5 /^{3} \\5x+1000=125\\5x=-875/:5\\x=-175

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
X=7w^+4w-6 and y=w^-11w+13
aleksandr82 [10.1K]
Although the terms might seem intimidating, this is a simple substitution problem.

X + Y = _______
Substitute the values of X and Y in terms of w
(7w^2 + 4w - 6) + (w^2 - 11w + 13) = ______
Now all you need to do is combine like terms (terms that have the same variables raised to the same power)
8w^2 - 7w + 7

Final Answer: 8w^2 - 7w + 7
3 0
3 years ago
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