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2 years ago

Which expression can be used to check the answer to 56➗(-4)=-4?

Mathematics

1 answer:

Drupady [299]2 years ago

8 0

Answer:

-14 × -4

Step-by-step explanation:

56 ÷ -4 = -4

To check your answer to a problem you will start with the answer you got when you divided times the answer to the problem, will give you the number you started with.

-14 × -4 = 56

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Now let $y=\sqrt2\tan z$ , so that $\mathrm dy=\sqrt2\sec^2z\,\mathrm dz$ . Then

$\displaystyle\frac12\int\frac{\mathrm dy}{y^2+2}=\frac12\int\frac{\sqrt2\sec^2z}{(\sqrt2\tan z)+2}\,\mathrm dz=\frac{\sqrt2}4\int\frac{\sec^2z}{\tan^2z+1}\,\mathrm dz=\frac1{2\sqrt2}\int\mathrm dz=\dfrac1{2\sqrt2}z+C$

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3 years ago

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