Triangle XWV is an equilateral triangle(every angle is 60). So both angle V's are vertical angles, which means the are the same(60). Y is 90. So once you have 60 and 90 in triangle YZV, you know the last angle(Z) is 30. But since angle Z is 30 and angle X is 60, they are complementary and not supplementary(which adds up to 180)
Answer:
814.5 mg remain after 4 hours
Step-by-step explanation:
The multiplier of the original quantity is 1 -5% = 0.95 for each passing hour. The amount remaining after x hours is ...
y = 1000·0.95^x
For x=4, the amount remaining is ...
y = 1000·0.95^4 = 1000·0.81450625
y ≈ 814.5 . . . mg remain after 4 hours
The answer is;
$185 + $460 + $240
(you can put those 3 numbers in any order)
=
$885
See the attached pic below
In the triangle formed by the statue and the boat, we have
and
We can solve either equation for 
, then substitute that into the other equation. First, let's abbreviate 
and 
. Then
B using more coal to make electricity
