Answer:
x = 13.5
BC = 30
Step-by-step explanation:
BC is double the length of DE. And we know that DE is equal to 15. So 15 x 2 is 30.
Now to find x. We know that our answer has to add up to 30. So we first subtract 3 from 30 to get 27. Then divide 27 by 2 to get what x is equal to. x = 13.5
I believe it should be the second one down. That one has the lowest residual after the longest period of time, which in this case is the number of days. I hope that helps!
Answer:
10
Step-by-step explanation:
So it's a 30-60-90 triangle, which you can either find with trig or if you remember this rule you can find it quick. In the pic n is 5, so to find x you just follow the rule and multiple 5 times 2, which is 10. Then the other side of the triangle would be
. This rule applies to any 30-60-90 triangle.