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Ganezh [65]
3 years ago
9

Classify the system and identify the number of solutions. X-2y-2z=8 2x+6y-2z=9 8x-6y-14z=11

Mathematics
1 answer:
seropon [69]3 years ago
8 0

Answer:

xyz=-3.11

Step-by-step explanation:

X+2x+8X-2y+6y-6y-2z-2z-14z=8+9+11

11x-8y+6y-18z=28

11x-2y-18z=28

xyz(11-2-18)=28

xyz(11-20)=28

xyz(-9)=28

xyz=28/-9

xyz=-3.11

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The morning announcements said that two out of every seven sixth-grade students in the school have an overdue library book. Jasm
gregori [183]

Answer:

We need to know how many students are in sixth grade and compare the real number with the 84 sixth graders that Jasmine claims to be.

Step-by-step explanation:

We would need to know how many students are in sixth grade to determine who is right. If two students out of seven have an overdue library book and grace claims that 24 of them are overdue by that means, what we would need to do is divide the allegedly 24 students between 2. Now we have 12 pairs of students that have overdue books. For every pair of students in sixth grade that have overdue books, seven students don’t have overdue books, so now we multiply 12 pairs of students with overdue books times 7 students who don’t have overdue books. By Jasmine calculation then, sixth grade have 84 students.  

If sixth grade have indeed 84 students, Jasmine is right. If there are not 84 students in sixth grade, she is wrong. Grace is right if there are fewer students than 84 in sixth grade.

Have a nice day! :D

6 0
3 years ago
Out of 300 students surveyed 17 have a dog predict how many of the 300 in school have a dog
Over [174]

Answer:

17/300.

Step-by-step explanation:

17/300 students have a dog.

8 0
3 years ago
Read 2 more answers
Find the slope and y-intercept of the line in each graph
seraphim [82]

Answer:

  slope: 1; y-intercept: 3

Step-by-step explanation:

The y-intercept is the y-value where the graph crosses the vertical y-axis. That value is 3.

The slope is the "rise" divided by the "run" for the graph. Here, the graph goes up 1 unit for each unit to the right, so the slope is ...

  m = rise/run = 1/1 = 1

The slope is 1, and the y-intercept is 3.

8 0
3 years ago
X/4 - y/3 =1 X and Y axis standard form
Semenov [28]

Answer:

Step-by-step explanation:

x/4 - y/3 = 1..multiply everything by the LCD....which is 12

3x - 4y = 12 <== standard form

=====================================

if it makes it easier for u, x/4 is the same as (1/4)x and y/3 is the same as (1/3)y

so ur problem can be written as : (1/4)x - (1/3)y = 1....multiply by 12

12(1/4)x - 12(1/3)y = 12(1)

(12/4)x - (12/3)y = 12.....reduce

3x - 4y = 12

5 0
3 years ago
2. At an amusement park, 60% of the people were adults, and the rest were
Aneli [31]

Answer:

Step-by-step explanation:

they had at least 989 people at the amusement park

7 0
3 years ago
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