write an expression to model the following situation: when rafa woke up, the temperature was –9°c. by noon, the temperature had
1 answer:
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Answer:
a = 5
Step-by-step explanation:
Since the triangle is right use the sine ratio to solve for a and
sin30° = , thus
sin30° = =
, hence
=
( cross- multiply )
2a = 10 ( divide both sides by 2 )
a = 5
Answer:
second option
Step-by-step explanation:
Given
f(x) =
The denominator cannot be zero as this would make f(x) undefined.
Equating the denominator to zero and solving gives the value that x cannot be, that is
3x - 5 = 0 ⇒ 3x = 5 ⇒ x = ← excluded value
Thus domain is
(- ∞, ) u (
, ∞ )