3 years ago

What number can be added to-4 to get the sum of 0

Mathematics

2 answers:

amid [387]3 years ago

8 0

The number 4 can be added to -4 to get 0

ra1l [238]3 years ago

4 0

It would be 4 i believe.

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3 years ago

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3 years ago

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spayn [35]

D is the right answer

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2 years ago

Help with 21 would be much appreciated.

umka2103 [35]

Answer:

$\large\boxed{x=2\sqrt{21}\ and\ y=4\sqrt3}$

Step-by-step explanation:

Look at the picture.

ΔADC and ΔCDB are similar. Therefore the sides are in proportion:

$\dfrac{AD}{CD}=\dfrac{CD}{DB}$

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$AD=14-8=6\\CD=y\\DB=8$

Substitute:

$\dfrac{6}{y}=\dfrac{y}{8}$ <em>cross multiply</em>

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