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10. If (1,-1) is a solution to 3x-ky=8 then 3(1)-k(-1)=8
3+k=8
k=8-3
k=5
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10. It is given that point P(1,-1) is the solution so it satisfy the given equation. =) K = 8-3 = 5 ans.
11. curved surface area of the hemisphere to know the extent of painting that needs to be done. Now, circumference of the dome =17.6m. Therefore, 17.6=2πr
12. answer is in the image
13.answer is in 2nd image
14. answer is in the 3rd image
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