Can someone help me with this and explain it to me please? :) CHECK ATTACHED

Mathematics

1 answer:

babymother [125]3 years ago

4 0

23. not equivalent because the first row 3x-9y=5 then if you multiplied this equation by 2 it will be 2(3x-9y) = 2(5) so 6x-18y= 10 not 6x-9y=10

24.equivalent because the second row 2y-6x=8 multiplied by 2 is 2(2y-6x)= 2(8) so 4y-12x=16

25. equivalent because the first row 5x+3y=19 multiplied by 2 is 2(5x+3y) = 2(19) SO 10X+6Y=38 and the second row 2x+4y=20 multiplied by 5 is 5(2x+4y)= 5(20) so 10x+20y=100

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Step-by-step explanation:

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We can solve it two ways, we´ll do it via physics:
We know that:
d=vt
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t=11550km/660km/h
t=17,5h
Math way:
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660km/h→x
So:
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8 0

3 years ago

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