only answer 2,3,5,6,7 questions
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Answer:
6-first no. is 22and swcond no. is 20
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2. Ration of angle =3:7:8
=3x:7x:8x
We know ,
Sum of 3angle of a triangle is 180*
•
•. •. 3x + 7x + 8x=180*
18x=180
X= 180/18
X=10
1st angle= (3 x 10)=30
2nd angle= (7 x 10)=70
3rd angle= (8 x 10)= 80..
3. Since 15,30 and x are in continuous proportion
Then
15:30::30:x
15/30 = 30/x
X= 30 x 30/15
X= 2 x 2
X=4
5. 9−2(−5)=+10
9−2+10=+10
=3x:7x:8x
We know ,
Sum of 3angle of a triangle is 180*
•
•. •. 3x + 7x + 8x=180*
18x=180
X= 180/18
X=10
1st angle= (3 x 10)=30
2nd angle= (7 x 10)=70
3rd angle= (8 x 10)= 80..
3. Since 15,30 and x are in continuous proportion
Then
15:30::30:x
15/30 = 30/x
X= 30 x 30/15
X= 2 x 2
X=4
5. 9−2(−5)=+10
9−2+10=+10
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