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Colt1911 [192]
3 years ago
15

Solve the system of equations. - 9x - 6y = 15 9x – 10y = 145 X = Y =

Mathematics
1 answer:
ss7ja [257]3 years ago
3 0
The answer is X = 5, and Y = -10 I hope this helps!! Please mark me brainliest
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2. Following are the marks obtained by a batch of 10 students in a
timurjin [86]

Answer:

Students level of knowledge is higher in accountancy  (Y) compared to statistics (X).

Step-by-step explanation:

The level of knowledge of the students in each subject can be known by comparing the mean score of the subjects.

Marks of the students in statistics (X) are: 63 64 62 32 30 60 47 46 35 28

mean = \frac{63 +64+62+32+30+60+47+46+35+28}{10}

          = \frac{467}{10}

          = 46.7

The mean mark of students in statistics (X) is 46.7.

Marks of students in accountancy (Y) are: 68 66 35 42 26 85 44 80 33 72

mean = \frac{68+66+35+42+26+85+44+80+33+72}{10}

         = \frac{551}{10}

         = 55.1

The mean mark of students in accountancy (Y) is 55.1.

It can be inferred that students level of knowledge is higher in accountancy  (Y) compared to statistics (X).

8 0
3 years ago
Determine the point estimate of the population​ proportion, the margin of error for the following confidence​ interval, and the
PilotLPTM [1.2K]

Answer:

point of estimate p = x/n

Step-by-step explanation:

p is the point estimate for the population , x is the number of success, n is the sample size.

p = Upper bound  + Lower bond/ 2      for population proportion

x = Upper bond + Lower bond /2          for population mean

E = Upper bond - Lower bond /2          E is margin of error

4 0
3 years ago
Round 3.282828... To the nearest thousandth
Vinil7 [7]
3.283 you look one decimal place to the right which is an 8. Since this is greater than 5, the two in the thousandth place is rounded up to a three.
3 0
4 years ago
Rose leaves her apartment to take her dog for a walk. She goes 3 blocks due south, 8 blocks due east, 5 blocks due north, and 8
prisoha [69]
Work shown above! in the end she is 2 blocks north of her apartment. hope this helps c:

4 0
4 years ago
In which expression would you complete the operation first and then find the absolute value of the sum?
Liula [17]
A. |11/8+2/3| (this is because the rest of the answers are either adding or subtracting two different absolute values)
8 0
2 years ago
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