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19 tháng 3 2020

\(\frac{5x+2y}{3}\text{ equals }\frac{y-4x}{5}\text{ then:}25x+10y=3y-12x\text{ therefore:}37x=-7x\)

\(\Rightarrow\frac{37}{-7}x=y\text{ therefore:}x+3y=\frac{104}{-7}x=-8\Rightarrow x=\frac{13}{7}\Rightarrow y=\frac{13.37}{-49}=...\text{ then}\)

\(\text{COMPUTE IT YOURSELF}\)

3 tháng 2 2017

y=5 nha

 true or false 1, If Ox and Oy are opposite rays then \(\widehat{xOy=180^o}\)2,If Ox and Oy are parallel then \(\widehat{xOy}=180^o\) or \(\widehat{xOy}=0^o\)3, If \(\widehat{xOy}=90^o\) then \(\widehat{xOy}\) is a straight angle4, If \(\widehat{xOy}\) +\(\widehat{yOz}=180^o\) then \(\widehat{xOy}\) and \(\widehat{yOz}\) are complementary5, If \(\widehat{xOy}\) is larger than \(\widehat{xOz}\) then \(\widehat{xOz}\) is an acute angle6, the lagest angle which is form by two rays is an obtuse...
Đọc tiếp

 true or false 

1, If Ox and Oy are opposite rays then \(\widehat{xOy=180^o}\)

2,If Ox and Oy are parallel then \(\widehat{xOy}=180^o\) or \(\widehat{xOy}=0^o\)

3, If \(\widehat{xOy}=90^o\) then \(\widehat{xOy}\) is a straight angle

4, If \(\widehat{xOy}\) +\(\widehat{yOz}=180^o\) then \(\widehat{xOy}\) and \(\widehat{yOz}\) are complementary

5, If \(\widehat{xOy}\) is larger than \(\widehat{xOz}\) then \(\widehat{xOz}\) is an acute angle

6, the lagest angle which is form by two rays is an obtuse angle

7, Two acute angles cannot be supplementary

8,\(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent

9, if \(\widehat{xOy}\) and \(\widehat{zOy}\)are supplementary then one of them must be an obtuse angle

10,if \(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent then \(\widehat{xOy}\) > \(\widehat{xOz}\)

11, If Ox lies between Oy and Oz then \(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent

1
29 tháng 11 2023

1: T

2: F

3: F

4: T

5: F

6: F

7: T

8: T

9: F

10: F

11: F

15 tháng 2 2017

7/12 = 5,25/9

Then the greatest value of y is 5

15 tháng 2 2017

=>        y<7/12 x 9 =5,25

=> greatest natural y=5

29 tháng 11 2023

1:F

2: F

3: T

4: T

5: F

1F

2F

3T

4T

5T

27 tháng 11 2023

1: false

2: False

3: False

4: True

5: False