Question

I need help in questions 8 and 9 please!!

Answer 1

8. 13

9. y = 16.444

Explanation:

8. You can find the distance between two points using the distance formula
`\sqrt{(y_(2) -y_(1))^(2) +(x_(2)-x_(1))^(2) } \\\\=\sqrt{(-10 -2)^(2) +(-7-(-12)^(2) } \\\\=\sqrt{(-12)^(2) +(5)^(2) } \\\\=√((144 +25) ) \\\\=√(169)\\ 13`

So the distance is 13

9 can be solved using a proportion.

5.4/9 = -10/y

9(-10)=5.4y

-90=5.4y

-90/5.4=y

16.444 = y