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3 years ago

9

A candidate scored 40 marks out of 120 wat was the percentage of the score

1 answer:

andriy [413]3 years ago

6 0

40/120 = 0.33 repeating
or 33%

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Solve by using substitution<br>-7x-2y=-13 and x-2y=11

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$\left \{ {{-7x-2y=-13} \atop {x-2y=11}} \right. \\\\ \left \{ {{-7x-2y=-13} \atop {x=11+2y}} \right.\\\\
Substitute\ second\ equation\ into\ the\ first\ one:\\\\
-7(11+2y)-2y=-13\\
-77-14y-2y=-13\\
-77-16y=-13\ \ \ |Add\ 77\\
-16y= 64\ \ \ |Divide\ by\ -16\\
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