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zysi [14]
3 years ago
11

MATH QUESTION HELP ME PLS, KINDA URGENT!!

Mathematics
2 answers:
DochEvi [55]3 years ago
5 0

Answer:

x= 2

y= 7

z= 4

Step-by-step explanation:

Equation 1: x+y+z=13

Equation 2: x-z= -2

Equation 3: -2x+y=3

Add equation 2 and 1

(x+y+z)+(x-z)= 13 -2

2x+y= 11

Add this to equation 3

(-2x+y)+(2x+y)= 11+3

2y= 14

y= 7

Plug in y= 7 to equation 3

-2x+(7)= 3

-2x+7=3

-2x= -4

x= 2

Plug x=2 into equation 2

2-z= -2

4 = z

Basile [38]3 years ago
4 0
Answer

X=2

Y=7

Z=4

Step by step answer

Trust
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A copy machine makes 24 copies per minute. How many copies does it make in 5 minutes and 15 seconds?
liubo4ka [24]

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Explanation:

15/60=6/24

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8 0
2 years ago
Suppose that you are asked to conduct a study to determine whether smaller class
weeeeeb [17]

Answer:

a. correlation

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c. yes

Step-by-step explanation:

a. Correlation is a measure of the amount of association existing between two variables.

b. For linear correlation, if points are plotted on a graph and all the points lie on a straight line, then perfect linear correlation is said to exist. When a straight line having a positive gradient can reasonably be drawn through points on a graph positive or direct linear correlation exists,

Similarly,when a straight line having a negative gradient can reasonably be drawn through points on a graph, negative or inverse linear correlation exists,

The results of this determination give values of r lying between +1 and −1, where +1 indicates perfect direct  Positive linear correlation and −1 indicates perfect inverse correlation or Negative linear correlation and 0 indicates that no correlation exists.

If the higher the population of students lead to a decrease in test score, there will definitely be a negative correlation between class size and test score. i.e low class size result in high test score which consequently lead to high performance.

c. YES

A negative correlation means low class size result in high test score which consequently lead to better performance.

8 0
3 years ago
HURRY GIVING BRAINLIEST !!
sashaice [31]
Answer:
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Step-by-step explanation:
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2 years ago
Given the points (8,9) and (2,7) find the slope M=
Goshia [24]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
The perimeter of a square is 192 centimeters. If the square is dilated by a scale factor of 0.25, what is the length of each sid
Ulleksa [173]

Answer:

60cm

Step-by-step explanation:

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6 0
2 years ago
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