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3 years ago

Bro can someone help me plz

Mathematics

2 answers:

sp2606 [1]3 years ago

7 0

Answer:

a) For 90 miles the payment is the same.

b) That would cost 81 dollar.

Step-by-step explanation:

a) x= the amount driven

45+0,40x=0,90x

<=> 45=0,5x

<=> x=90

b) 0,90.90=81

juin [17]3 years ago

5 0

Answer:24 miles/50$

Step-by-step explanation:

thats what i got

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$x-y+z=1\,\,\,eq(1)\\x+y+3z=-3\,\,\,eq(2)\\2x-y+2z=0\,\,\,eq(3)$

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$x-y+z=1\\x+y+3z=-3\\--------\\2x+4z=-2\,\,\,\,eq(4)\\$

Adding eq(2) and eq(3)

$x+y+3z=-3\\2x-y+2z=0\\----------\\3x+5z=-3\,\,\,eq(5)$

Multiplying eq(4) by 3 and eq(5) by 2

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Now putting value of z=0 and x =-1 in equation 1

$x-y+z=1\\-1-y+0=1\\-y=1+1\\-y=2\\y=-2$

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Keywords: Solve the system

Learn more about Solve the system at:

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