The answers are A and C
PS you should give me the brainliest andswer
642.2 is the answer if you multiply 3.8x169
Answer:
18°
Step-by-step explanation:
The law of cosines tells you ...
a² = b² + c² -2bc·cos(A)
Solve for cos(A) and fill in the numbers. Note that the value of cos(A) is very close to 1, so the angle will be fairly small. This by itself can steer you to the correct answer.
cos(A) = (b² +c² -a²)/(2bc) = (49 +100 -16)/(2·7·10) = 133/140
A = arccos(133/140) ≈ 18.2° ≈ 18°
Answer:

Step-by-step explanation:
Let
and
.
The slope of AC can be found using

Substitute the variables to get;
