E and B are your answers to this
Answer: 12-2r
Step-by-step explanation:
3r+12-5r
= -2r+12 or 12-2r
Answer:
q = 8
Step-by-step explanation:
Given the 2 equations
p + q = 36 → (1)
p - q = 20 → (2)
Add the 2 equations term by term
2p = 56 ( divide both sides by 2 )
p = 28
Substitute p = 28 into (1)
28 + q = 36 ( subtract 28 from both sides )
q = 8
Have you considered applying the Law of Cosines?
For angle B: b^2 = a^2 + c^2 - 2ac*cos B
a, b and c are all known, leaving cos B as the only unknown. Find cos B, and then find angle B itself. From the diagram we know that angles A, B and C are all acute.
