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4 years ago

5

In a science test devi scores 15 marks more than lixin . If devi obtains twice as many marks as lexin . Find the number of marks

lixin obtains.

1 answer:

Aleks04 [339]4 years ago

7 0

Answer:

15

Step-by-step explanation:

D=2l

D=l+15

Substitute

2l=l+15

L=15

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notka56 [123]

Answer:

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Step-by-step explanation:

Use distance formulae to find out the distance.

$\rm \: Distance = \sqrt{(x_2-x_1) {}^{2} +(y_2-y_1) {}^{2} }$

ATQ,

$\rm \: (x_2,x_1) = (9,2)$
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Substituting them on the formulae,we obtain

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$\rm \: Distance \: D = \sqrt{7 {}^{2} - 1 {}^{2} }$
$\rm \: Distance \; D = \sqrt{49 + (- 1 \times - 1)}$
$\rm Distance \: D = \sqrt{49 + 1}$
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