3 years ago

Please help its a quiz

Mathematics

2 answers:

Aleks04 [339]3 years ago

8 0

Answer:

Step-by-step explanation:

Soloha48 [4]3 years ago

8 0

……………..The answer is c

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Ivahew [28]

$\dfrac{1}{2 \sqrt{7} + 3 \sqrt{3} }$

$= \dfrac{1}{2 \sqrt{7} + 3 \sqrt{3} } \times \dfrac{2 \sqrt{7} - 3 \sqrt{3}}{2 \sqrt{7} - 3 \sqrt{3}}$

$=\dfrac{2 \sqrt{7} - 3 \sqrt{3}}{(2\sqrt{7})^2 - (3\sqrt{3})^2}$

$=\dfrac{2 \sqrt{7} - 3 \sqrt{3}}{28 - 27}$

$=\dfrac{2 \sqrt{7} - 3 \sqrt{3}}{1}$

$=2 \sqrt{7} - 3 \sqrt{3}$

6 0

3 years ago

- x+5y = 19<br> X+ 2 y = 16<br> Solving systems using elimination

Vesna [10]

Hope this helps with the answer ;)