Answer:the answer is B
Step-by-step explanation:
AC = 2.87
Solution:
Given AB = 5
To find the length of AC:
The given triangle is a right triangle.
So we can use trigonometric formula.






⇒ AC = 2.87
Hence the length of AC = 2.87.
-3 times (x+8)=-21
-3(x+8)=-21
distributive property=a(b+c)=ab+ac
-3(x+8)=-3x+(-3)(8)=-3x-24
-3x-24=-21
add 3x to both sides
-24=-21+3x
add 21 to both sides
-3=3x
divide both sids by 3
-1=x
x=-1