$given \: equations \: are \\ x - 2y = 15 \: \: and \: 2x + 4y = - 18 \\ divide \: by \: 2 \: in \: second \: equation \\ x + 2y = - 9 \: \: (equation \: 3) \\ adding \: 1and \: 3 \: we \: get \\ 2x = 6 \\ x = 3 \\ substitute \: x = 3 \: in \: equation \: 3 \\ 3 + 2y = - 9 \\ 2y = - 9 - 3 \\ 2y = - 12 \\ y = - 6$

x=3 and y=-6

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6 0

3 years ago

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Sketch the graph of 5x+7y=35, include the intercepts

zhenek [66]

Slope intercept form: y= −5 7 x+5

The graphing points would be (0,5)(7,0)

7 0

3 years ago

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Help me pls this is urgent ;>

postnew [5]

Answer:

$\frac{ |a + x| }{2} - \frac{ |a - x| }{2} \\ \\ = \frac{ | - 2 - 6| }{2} - \frac{ | - 2 + 6| }{2} \\ \\ = \frac{ | - 8| }{2} - \frac{ |4| }{2} \\ \\ = \frac{8}{2} - \frac{4}{2} \\ \\ = 4 - 2 = 2$

5 0

3 years ago

What is the perimeter of this tile 4in. 1in.? is it 10 in. or 10 in2power

coldgirl [10]

P = 2 × 4in + 2 × 1in = 8in + 2in = 10in

3 0

3 years ago