Answer:
see explanation
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Subtract the sum of the given angles from 180 for B
B = 180° - (90 + 40)° = 180° - 130° = 150°
--------------------------------------------------------------
sin40° =
= 
Multiply both sides by 21
21 × sin40° = a, thus
a ≈ 13.5 ( to the nearest tenth )
--------------------------------------------------------------
cos40° =
= 
Multiply both sides by 21
21 × cos40° = b, thus
b ≈ 16.1 ( to the nearest tenth )
Should be four times to get in between 9 and 10
It would be 1/64 I hope this helps with your question.
Answer:
D
Step-by-step explanation:
Reflection over the X-axis
All point passes, (x,-y)
Answer: 20-4x
Explanation:
20(a number) minus 4 times x