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Allisa [31]
3 years ago
5

I need the answer for number 3.

Mathematics
1 answer:
deff fn [24]3 years ago
6 0

Answer:

0.12

Step-by-step explanation:

15 divided by 125 is equal to 0.12

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Substitution method <br><br> x-7y=-9<br> -x+8y=10
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Answer:

x = -2, y=1

Step-by-step explanation:

x-7y=-9---------------------equation 1

-x+8y=10-------------------equation 2

From equation 1, make x the subject of formula

x=7y-9----------------------equation 3

substituting x=7y-9 in equation 2,

-(7y-9)+8y=10

Expanding bracket

-7y+9+8y=10

Collecting like terms

8y-7y=10-9

y=1

substituting y=1 in 3

x=7(1)-9

x=7-9

x=-2

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