Answer:
a
Step-by-step explanation:
Answer:c
Step-by-step explanation:
Your answer will be X=4c−b<span>
I hope helped ^-^
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Use trigonometric ratios.
Use angle(19)
Adjacent side of angle measure 19 is X
The hypotenuse is 21.
Use the cosine
Cos(19)=x/21
Plug in calculator
(21)cos(19)=19.85
Round to the nearest tenth. Which means the 8 rounds up to 9.
Answer: 19.9
