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2 years ago

Five less than one fourth of my age is 12

Mathematics

2 answers:

Ber [7]2 years ago

6 0

5 less than (-5) of 1/4 of my age (age/4) is 12 (=12)

-5+a/4=12
add 5 to both sides
a/4=17
times 4 both isdes
a=68

your age is 68

Alex Ar [27]2 years ago

3 0

X/4 -5=12
X/4=17
X=17*4
X=68
Mr. Enigma is 68 years old

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Anuta_ua [19.1K]

Answer:

$\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}$

Step-by-step explanation:

Given

$\sin(105^o)$

Required

Solve

Using sine rule, we have:

$\sin(A + B) = \sin(A)\cos(B) + \sin(B)\cos(A)$

This gives:

$\sin(105^o) = \sin(60 + 45)$

So, we have:

$\sin(60 + 45) = \sin(60)\cos(45) + \sin(45)\cos(60)$

In radical forms, we have:

$\sin(60 + 45) = \frac{\sqrt 3}{2} * \frac{\sqrt 2}{2} + \frac{\sqrt 2}{2} * \frac{1}{2}$

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Take LCM

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Rewrite as:

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Hence:

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Step-by-step explanation:

hope it helps have a good day

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