Solve a system of equations using substitution –2x + 5y = 14 x = 8
1 answer:
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Answer:
∠ p ≈ 59°
Step-by-step explanation:
Using Pythagoras' identity in right triangle ABD to find DB
DB² = 5² + 6² = 25 + 36 = 61 ( take square root of both sides )
DB =
---------------------------------------
Using the cosine ratio in right triangle DBC
cos p = =
=
, thus
p = (
) ≈ 59°