Answer:
angle B = 78.46°
Step-by-step explanation:
Use the cosine ratio


Hope this helps
Answer:
32º
Step-by-step explanation:
Fº-32 ×5/9
5/9Fº-160/9
5/9Fº =160/9
(5Fº)9=9(160)
45Fº=1440
divide both sides by 45
Fº=32
The denominator in each term of the series is a square number, but neither

nor

are squares. So none of (1), (2), and (4) can be correct. The answer must be (3).
Answer:
−
8
r^
13
Step-by-step explanation:
Combine like terms
-4r and 2r= -8r
then add the exponents
5+8=13
THEN SIMPLIFY
-8r^13