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Nadusha1986 [10]
3 years ago
7

A rectangular room is 5 meters longer than it is wide, and its perimeter is 22 meters. Find the dimension of

Mathematics
2 answers:
Maslowich3 years ago
5 0
Perimeter = 2L + 2W
22m= 2(5) + 2W
22= 10 + 2W
22-10=2W
12= 2W
scoundrel [369]3 years ago
3 0

Answer:

The dimension of the room is 8m by 3m

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ramone has 5 difficult questions left to answer on a multiple choice test. Each question has 3 choices. For the first 2 of these
olchik [2.2K]
1. a b c
2. a b c
3. a b c
4. a b c
5. a b c

then she eliminated 1 choice in 1 and 2, say as follows

1.    b c
2. a b 
3. a b c
4. a b c
5. a b c

Probability of answering correctly the first 2, and at least 2 or the remaining 3 is 
P(answering 1,2 and exactly 2 of 3.4.or 5.)+P(answering 1,2 and also 3,4,5 )

P(answering 1,2 and exactly 2 of 3.4.or 5.)=
P(1,2,3,4 correct, 5 wrong)+P(1,2,3,5 correct, 4 wrong)+P(1,2,4,5 correct, 3 wrong)
also P(1,2,3,4 c, 5w)=P(1,2,3,5 c 4w)=P(1,2,4,5 c 3w )
so  
P(answering 1,2 and exactly 2 of 3.4.or 5.)=3*P(1,2,3,4)=3*1/2*1/2*1/3*1/3*2/3=1/4*2/9=2/36=1/18

note: P(1 correct)=1/2
         P(2 correct)=1/2
         P(3 correct)=1/3
         P(4 correct)=1/3
         P(5 wrong) = 2/3

P(answering 1,2 and also 3,4,5 )=1/2*1/2*1/3*1/3*1/3=1/108

Ans: P= 1/18+1/108=(6+1)/108=7/108
5 0
3 years ago
Doctor florens needs 25 g of salt for each student to do an experiment she has 1.2 kg of salt on hand she has a total of a 128 s
erik [133]
The first thing I would do is convert that 1.2 kilograms of salt to grams; that would ensure that all the units are the same so we can perform calculations on them.

1.2kg = 1200g


Next, I would find out how many students can do the experiment with 1200g of salt, by finding it how many 25g are in 1200g (by dividing them).

\frac{1200g}{25g}=48students


That means we still have 80 students left to provide salt for (128 - 48).
Therefore, he needs an additional 80 amounts of 25g of salt.

Therefore he needs:
80students*25g = 2000g = 2kg
5 0
3 years ago
Write 0.8 repeating as a fraction
Alborosie
The answer is 8/9 i believe.
4 0
3 years ago
Read 2 more answers
The perimeter of a standard-sized rectangular rug is 44 feet. The width is 2 feet
mariarad [96]

Answer:

Step-by-step explanation:

Perimeter of a rectangle = 2(l+b)

Let the length be x

then width  = x-2

44 ft = 2(l+b)

44ft = 2(x + x-2)

44ft  =  2(2x-2)

44 ft = 4x -4

44+4 = 4x

48 = 4x

x = 48/4 = 12

Length = <u>x = 12</u>

Width = <u>x-2 = 12-2 =10</u>

<u></u>

<u>Length is 12 and width is 10</u>

<u></u>

<u>check if its correct </u>

2(l+b) = 44

2(12+10)=44

2(22) = 44

8 0
1 year ago
1.Draw Angle POQ of measure 75° and find its line of symmetry<br><br> Pls answer with steps
Butoxors [25]

Step-by-step explanation:

you need too look somewhere else

8 0
2 years ago
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