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3 years ago

Please help on number 15

Mathematics

1 answer:

borishaifa [10]3 years ago

6 0

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Is 6 and 2/3 less then 6.3?

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No, I believe that 6 and 2/3 is larger than 6.3

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Factoring math/////////

damaskus [11]

Answer:

Step-by-step explanation:

If you want to factor this, you have to use the quadratic formula to do so.

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}$

For us, it looks like this:

$x=\frac{-3+/-\sqrt{(-3)^2-4(5)(4)} }{2(5)}$

which simplifies to

$x=\frac{-3+/-\sqrt{-71} }{10}$

Since it breaks every mathematical rule to have a negative number under an even index radical, we have to deal with that using the imaginary "i". You should know at this point that $i^2=-1$

so we will do a rewrite on that equation above:

$x=\frac{-3+/-\sqrt{i^2*71} }{10}$

which simplifies further to

$x=\frac{-3+/-i\sqrt{71} }{10}$

This is the answer but we can separate it into its proper standard form which is

$x=-\frac{3}{10}+\frac{\sqrt{71} }{10}i$ and $x=-\frac{3}{10}-\frac{\sqrt{71} }{10}i$

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Glven: ABCD is a parallelogram.<br> Prove: AB - CD and BC – DA

coldgirl [10]

Answer:

$by \: rotation : \\ { \bf{AB + BC = CD+ AD}} \\ { \boxed{ \tt{AB - CD = BC - DA}}}$

since: DA = -AD

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Express 42 base 7 in base 10

xxTIMURxx [149]

Answer:

correct 42 in bsae 10 is 60

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This is one fourth of the course, so 25%.

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