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Marianna [84]
3 years ago
8

Work out the value of: 3x + 2y When x = -3 and y = -4

Mathematics
2 answers:
Mekhanik [1.2K]3 years ago
8 0

3( - 3) + 2( - 4) \\  - 9 - 8 =  - 17
Fiesta28 [93]3 years ago
5 0

Answer:

-17

Step-by-step explanation:

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Numerator

sin

x

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cos

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sin

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=

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Denominator

cos

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sin

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+

cos

x

cos

y

+

sin

x

sin

y

=

cos

x

cos

y

−

sin

x

sin

y

+

cos

x

cos

y

+

sin

x

sin

y

=

2

cos

x

cos

y

---------------------------------------------------------------

left side can now be expressed as

2

cos

x

sin

y

2

cos

x

cos

y

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cos

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sin

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2

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sin

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cos

y

and  

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3 years ago
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3. B
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