1 answer:
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A rational number is a number that can be written as a fraction or "ratio".
It includes the set of integers because all of them have a denominator of 1. A rational number can take on the form of
where b ≠ 0. Terminating and repeating decimals are rational numbers because they too can be written as a ratio; for example, 0.3 = 
or 0.3333... = 
.
It includes the set of integers because all of them have a denominator of 1. A rational number can take on the form of
Answer:
Y = 59.0°
Step-by-step explanation:
Using the cosine rule in terms of x, y and z
cosY =
with x = 22, y = 20 and z = 18
cosY =
=
= , thus
Y = (
) ≈ 59.0° ( to the nearest tenth )