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Grace [21]
3 years ago
10

3x - 5y+5=04x+ 7y+8=0Please help ​

Mathematics
1 answer:
natima [27]3 years ago
3 0

Answer:

Y= -4. X=5

Step-by-step explanation:

This is a simultaneous equation

3x+5y= -5 ------------(1)

4x+5y= -8 ------------(2)

Using elimination method

Eliminate x

×4. 3x+5y= -5

×3. 4x+7y= -8

12x+20y= -20

-(12x+21y= -24) Minus

-y=4 therefore y= -4

Substitute x into equation 1

3x+5(-4)= -5

3x-20= -5

3x= -5+20

3x= 15

x=5

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Dahasolnce [82]

Answer:

Exact form: 37/8 Decimal form: 4.625 Mixed number form: 4 5/8

Step-by-step explanation:

dd the whole numbers first.

4+\frac{1}{4}+\frac{3}{8}

4+

4

1

​

+

8

3

​

2 Find the Least Common Denominator (LCD) of \frac{1}{4},\frac{3}{8}

4

1

​

,

8

3

​

. In other words, find the Least Common Multiple (LCM) of 4,84,8.

LCD = 88

3 Make the denominators the same as the LCD.

4+\frac{1\times 2}{4\times 2}+\frac{3}{8}

4+

4×2

1×2

​

+

8

3

​

4 Simplify. Denominators are now the same.

4+\frac{2}{8}+\frac{3}{8}

4+

8

2

​

+

8

3

​

5 Join the denominators.

4+\frac{2+3}{8}

4+

8

2+3

​

6 Simplify.

4\frac{5}{8}

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8

5

​

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