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lilavasa [31]
3 years ago
10

ANSWER FAST PLEASEE

Mathematics
2 answers:
Nadusha1986 [10]3 years ago
7 0
7x + 3y = 15
2x = y+8

2nd equation can be rewritten as x = y/2 +4

replace x in 1st equation with that:

7(y/2+4) +3y = 15
 distribute:

7y/2 + 28 +3y = 15

multiply 3y by 2/2 = 6y/2

7y/2 + 6y/2 + 28 = 15

13y/2 + 28 = 15

13y/2 = -13

13y = -26

y = -26 / 13 = -2

2x = -2 +8

2x = 6
x = 6/2 = 3

x=3, y = -2

solution is (3,-2)




NeTakaya3 years ago
4 0
The ANSWER IS A 
A) 7x+3y=15
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Answer:

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Answer:

Step-by-step explanation:

Answer:

x

=

π

3

,

2

π

3

,

4

π

3

,

5

π

3

Explanation:

(

sin

x

)

2

=

3

(

cos

x

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2

(

sin

x

)

2

=

3

(

1

−

(

sin

x

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2

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(

sin

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2

=

3

−

3

(

sin

x

)

2

4

(

sin

x

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2

=

3

(

sin

x

)

2

=

3

4

sin

x

=

±

(

√

3

2

)

x

=

π

3

,

π

−

π

3

,

π

+

π

3

,

(

2

π

)

−

π

3

x

=

π

3

,

2

π

3

,

4

π

3

,

5

π

3

If this was in the region

0

≤

x

≤

2

π

6 0
4 years ago
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