The answer is 48 degrees because you add 42 and 90 and then subtract from 180 (total degrees of a triangle)
Answer:
17 million
Step-by-step explanation:
-0.34(
) + 4.43(8) + 3.46
-21.76 + 35.44 + 3.46
13.68 + 3.46
17.14
Answer: C 17 million
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<u><em>PLEASE RATE!</em></u>
1. A)
7x= 3(35)
7x= 105
105/7= 15
Therefore x=15
2. C)
We'll use the following properties of sine and cosine to prove this:



Then it's just a matter of filling it in...
sin20sin40 * sin60sin80 = 1/2(cos20 - cos60) * 1/2 (cos20 - cos140) =
1/8( cos40 + 1 - cos160 - cos120 - cos40 - cos80 + cos80 + cos200) =
1/8(1 - cos160 - cos120 + cos200) =
1/8(1 - cos160 - cos120 + cos160) =
1/8(1 - cos120 ) = 1/8( 1 + 1/2 ) = 3/16