Answer:
Y ≈ 59.0°
Step-by-step explanation:
Using the Cosine Rule in Δ XYZ
cosY =
Here x = 22, y = 20, z = 22, then
cosY =
=
= , thus
Y = (
) ≈ 59.0° ( to the nearest tenth )
A family spends 1/10 of its annual income for housing, 1/4 for food and clothing, 1/5 for general expenses, and 2/15 for enterta
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