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Pani-rosa [81]
3 years ago
10

How do you solve: 21 11/12 plus 17 5/12

Mathematics
2 answers:
GarryVolchara [31]3 years ago
6 0
The problem is 21  \frac{11}{12} + 17 \frac{5}{12}

Add the whole numbers

21 + 17 = 38

Match up the fractions and make sure the denominators are the same (they are)

\frac{11}{12}  +  \frac{5}{12} =  \frac{16}{12}

Break down the fraction 

16 ÷ 12 = 1 \frac{4}{12}

Reduce-You need to find a common factor for both the numerator and denominator

4 ÷ 4 = 1

12 ÷ 4 = 3

Combine everything

38 +  1\frac{1}{3} =39  \frac{1}{3}

Answer: 39  \frac{1}{3}







ArbitrLikvidat [17]3 years ago
6 0
If you would like to calculate 21 11/12 + 17 5/12, you can do this using the following steps:

21 11/12 + 17 5/12 = 263/12 + 209/12 = (263 + 209) / 12 = 472/12 = 118/3 = 39 1/3

The correct result would be 39 1/3.
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The owner of a stereo store wants to advertise that he has many different sound systems in stock. The store carries 6 different
Orlov [11]

Answer: 540

Step-by-step explanation:

Given : The owner of a stereo store wants to advertise that he has many different sound systems in stock.

Number of different CD​ players =6

Number of different receivers= 10

Number of  different speakers = 9

We are assuming that a sound system consists of one of​ each .

Then by Fundamental principle of counting , we have

The number of different sound systems can he​ advertise = (Number of different CD​ players)x (Number of different receivers) x(Number of  different speakers)

= 6 x10 x 9 =540

Hence, the number of different sound systems can he​ advertise =540

6 0
3 years ago
The original price of a coat is $90. It is on sale for 20% off. How much will you pay if you buy the cost during the sale?
ziro4ka [17]

Answer:

72$

Step-by-step explanation

How to insert in a calculator 90-20%= 72

How to take 20% from a price

Divide the original price by 5. <em>18</em>

Subtract this new number from the original one. <em>90 - 18 </em>

The number you calculated is the discounted value. <em>90 - 18 = </em><u><em>72</em></u>

6 0
3 years ago
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The automatic opening device of a military cargo parachute has been designed to open when the parachute is 200 m above the groun
kirill115 [55]

Step-by-step answer:

Given:

mean, mu = 200 m

standard deviation, sigma = 30 m

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Maximum deviation for no damage, D = 100 m

Solution:

Z-score for maximum deviation

= (D-mu)/sigma

= (100-200)/30

= -10/3

From normal distribution tables, the probability of right tail with

Z= - 10/3

is 0.9995709, which represents the probability that the parachute will open at 100m or more.

Thus, by the multiplication rule, the probability that all five parachutes will ALL open at 100m or more is the product of the individual probabilities, i.e.

P(all five safe) = 0.9995709^5 = 0.9978565

So there is an approximately 1-0.9978565 = 0.214% probability that at least one of the five parachutes will open below 100m

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4 years ago
there are 680 students and Cassie's High School 40% of the students are taking Spanish how many students are taking Spanish​
snow_lady [41]
272

680 x 0.40 = 272
8 0
3 years ago
Help, two of these questions plz
Olenka [21]

Answer:

First Answer: y= 64 and x=64

Second Answer: 1&4, 2&3, 6&7, 5&8

Step-by-step explanation:

First Answer: 63 and ∠y is the same measure since there are

Second answer: They are vertical angles, each of the pairs of opposite angles made by two intersecting lines.

Hope this helps:)

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