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Yuliya22 [10]
3 years ago
7

3x+3y=6 and 5x-6y=15

Mathematics
1 answer:
Anna71 [15]3 years ago
7 0
Multiply first equaton by 2 and add to the other equation

6x+6y=12
<u>5x-6y=15 +</u>
11x+0y=27

11x=27
divide both sides by 11
x=27/11


sub back
3x+3y=6
divide both sides by 3
x+y=2
(27/11)+y=2
2 and 5/11+y=2
minus  2 and 5/11 both sides
y=-5/11

x=27/11
y=-5/11
(27/11,-5/11)
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3 years ago
Read 2 more answers
Use trig identities to transform the left side of the equation to the right side.
Taya2010 [7]

<u>Answer and explanation</u>

(1+sinθ)(1-sinθ)=cos²θ

We are to prove that the left hand side is equal to the right hand side.

(1+sinθ)(1-sinθ) = 1(1-sinθ) + sinθ(1-sinθ)

                         = 1 - sinθ + sinθ - sin²θ

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1 - sin²θ = cos²θ


7 0
3 years ago
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aleksklad [387]

Answer:

See the explanation below

Step-by-step explanation:

Which number has the greatest value

From the given list of numbers

Option A has the greatest value

A 8.07 x 10^5

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Top left and bottom right yes the rest no
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dimulka [17.4K]

Answer:

400 +480 =880

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880

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