Kei

19. A ball with a mass of 2 kg moves to the right at a speed of 0.28 m/s. It hits a ball of mass 0.5 kg which is at rest. After collision, the second ball moves to the right with a speed of 1.5 m/s. What is the speed and direction of the first ball after...

Given that $x^n - \frac1{x^n}$ is expressible as a polynomial in $x - \frac1x$ with real coefficients only if $n$ is an odd positive integer, find $P(z)$ so that $P\left(x-\frac1x\right) = x^5 - \frac1{x^5}.$

They stand. They stands does not sound right and stand is the plural verb. Or maybe the word would be stood depending on what sentence you're using it in. Explain please?

Very good except "writings" in sentence two. A good word would be readings or stories. GOOD JOB! :)

This is so helpful for checking your answers! Thank you Connection Unite! Thank goodness im part of the Connection,i wouldn't have figured this out!

Btw,(I checked my answers with this,not cheated)

umm l not know bat l think so. maybe is good