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MAXImum [283]
4 years ago
7

In a survey music preferences

Mathematics
2 answers:
Over [174]4 years ago
7 0
81/450 is 0.18.
If you move the decimal place to the right two spots, you've got your percentage.
18% said they preferred country music.
Salsk061 [2.6K]4 years ago
7 0
We can write all information we have as:

81 answers = x% of 450 students

So we just need to do a simple equation:

81 = x% * 450
81 = \frac{x}{100} * 450
81 = \frac{x}{10} * 45
81 = \frac{45x}{10}                 / * 10 (both sides)
810 = 45x                    / ÷ 45 (both sides)
<u>x = 18 [percent]</u>

Answer: 18% of the students preferred country music.
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Laura is planning a party for her son. She has $50 dollars remaining in her budget and wants to provide one party favor per pers
enyata [817]

Answer:

The system of inequalities that represents this situation is:

x+y≥10

6x+4y≤50

Step-by-step explanation:

As the statement says that Laura wants to provide one party favor per person to at least 10 guests, the first inequality would indicate that the number of stuffed animals plus the number of toy trucks should be equal or greater than 10:

x+y≥10

Also, the statement indicates that miniature stuffed animals cost $6.00 each and the toy trucks cost $4.00 each and that Laura has $50. From this, you would have an inequality that indicates that 6 for the number of miniature stuffed animals and 4 for the number of toy trucks would be equal or less than 50:

6x+4y≤50

The answer is that the system of inequalities that represents this situation is:

x+y≥10

6x+4y≤50

4 0
4 years ago
Suppose that a high school marching band has 86 members. Of these 86 band members, 26 are seniors, 17 play the trumpet, and 4 ar
GalinKa [24]

Answer: 0.3023

Step-by-step explanation:

86 band members

26 are senior, 17 plays trumpet. If 4 are seniors and play trumpet, we solve this using the bayes theorem of conditional probability.

Probability of choosing band member that plays trumpet =17/86 = 2/43.

Probability of choosing a senior that plays trumpet = 4/26

Probability that a chosen member is a senior given that he plays trumpet = (2/43)/(4/26)

= 0.3023.

8 0
3 years ago
4x10^-6 + 6.8x10^7=
kirill115 [55]
I typed it in a calculator and got 68,000,000, so just correct me if im wrong.
4 0
3 years ago
Sebastian measures a line to be 9.2 inches long. if the actual length of the line is 19.5 inches, then what was the percent erro
seraphim [82]

Answer:

47%

Step-by-step explanation:

9.2/19.5=0.47179

the number in the tenth place is 7 and It can´t be changed because 1 isn´t 5 or it also isn´t greater than 5.

4 0
3 years ago
Sheila predicts that 480 people will attendthe fall concert. There was an actual total of 350 people who attended the fall conce
iris [78.8K]

Answer:

27 %

Step-by-step explanation:

Given that Sheila predicts that 480 people will attendthe fall concert and There was an actual total of 350 people who attended the fall concert.

We know that

Percent error = \frac{people present-predicted people}{predicted people}\times100

Percent error = \frac{480-350}{480}\times100

Percent error = 27 %

5 0
3 years ago
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