Answer:
C
Step-by-step explanation:
The area (A) of the triangle is calculated as
A = bh ( b is the base and h the perpendicular height )
The triangle is equilateral , since 3 angles = 60°
Then base AB = 12
Find height CD using the sine ratio in the right triangle ( there are 2 )
sin60° = = = = ← exact value of sin60° ( cross- multiply )
2CD = 12 ( divide both sides by 2 )
CD = 6
Then
A = × 12 × 6 = 6 × 6 = 36 units² → C
#11: Angle one and the compliment of angle two will add up 148, and they will be equal since the two legs of the triangle are equivalent.
148/2 = 74
Therefore, angle one is 74 degrees.
Complimentary means that two angles add to 180, so
180 - 74 = 106
Therefore, angle two is 106 degrees.
So these are our two equations:
Before we can use elimination, subtract y on both sides of the first equation:
Now we are able to use elimination. To eliminate the y variable, add the two equations together to get . From here we can solve for x.
For this, just divide both sides by 3 and your first answer will be
Now that we have the value of x, substitute it into either equation to solve for y:
<u>In short, x = 3 and y = 6.</u>
7.62 X 10 to the -6th power goes to the third one
7.62 X 10 to the 5th power goes to the second
and 7.62 X to the -4th power goes to the fourth
and i think you have the first one right!
i really hoped this helped you