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Dafna1 [17]
3 years ago
11

The system when solved is:

Mathematics
1 answer:
Karolina [17]3 years ago
3 0

Answer:

1,-4

its the right answer

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A teacher gave a test to a class in which 10% of the students are juniors and 90% are seniors. The average score on the test was
IceJOKER [234]

Each junior  receives 93 score on the test. It is also the average score of the juniors.

Given Information

It is given that 10% of the strength of the class consists of juniors and 90% consists of seniors.

Let us assume the total strength of the class is 100, then,

Number of seniors = 90

Number of juniors = 10

It is also given that the average score of the class = 84

And, average score of the seniors = 83

Another given information is that all the juniors all received the same score, which is their average score. Let it be x.

Average Score of Juniors

Total marks obtained by the seniors = Number of seniors × Average score of seniors

= 90 × 83

= 7470

Total marks obtained by the juniors = Number of juniors × Average score of juniors

= 10x

Average marks on the test = Total marks / Total number of students

⇒ 84 = (7470 + 10x)/100

⇒ 84 × 100 = 7470 + 10x

⇒ 10x + 7470 = 8400

⇒ 10x = 8400-7470

⇒ 10x = 930

⇒ x = 930/10

⇒  x = 93

Thus, each junior scores 93 on the test.

Learn more about average here:

brainly.com/question/24057012

#SPJ4

5 0
2 years ago
Nina plots the locations of 4 places on a coordinate grid as given below (It is recommended that you work this out on graph pape
yuradex [85]

Answer:

n

Step-by-step explanation:

n

8 0
3 years ago
- A school is using 12 passenger vans to transport
Maru [420]

Answer: s/12 = v

Step-by-step explanation:

6 0
3 years ago
Estimate by rounding 642÷83
Sunny_sXe [5.5K]

8

round each number to the nearest 10, then

640 ÷ 80 = 8 ← estimate


5 0
3 years ago
The data below shows the minimum wage requirement of the u.s government in years,x, after 1960. Based on the data provided what
mixas84 [53]

Answer:

<em>Option c</em>

Step-by-step explanation:

<u>Best Fit Regression Model </u>

When experimental data is collected, scientists frequently ask themselves if there is a relationship between some of the variables under study. It's crucial in modern times where artificial intelligence technology is trying to find key answers where traditional approaches hadn't before.

One of the most-used tools to find relations between variables is the regression model and its best fit lines to try to find an expression who relates variable x (years from 1960) and variable y (minimum wage requirement) as of our case.

The provided data was entered into a digital spreadsheet and an automatic function was applied to find the best-fit model.

We found this equation:

y=0.11363x+0.6906

when rounded to three decimal places, we find

y=0.114x+0.691

Which corresponds to the option c.

7 0
3 years ago
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