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these 3 square are made from 4 sticks each and empty space between them is 1 stick lenght

Make 1 square from 3 squares by removing 1 stick and moving 3 sticks.

The solution #6187 (two values) is correct. Neat work, bobbym!

#6188. Find the values of k for which the roots are real and equal in each of the following equation:

kx(x - 2) + 6 = 0.

The solution set in #3766 is perfect. Excellent, bobbym!

In each of the following system of equations determine whether the system has a unique solution, no solution or infinitely many solutions.

In case there is a unique solution, find it:

x - 3y = 3,

3x - 9y = 2.

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Apparently, but really there's only two: the 'in it for how much I can make' party and the 'I really want to make the world a better place' party, which is everyone else.

Unfortunately, the media tend to promote the former.

Bob

It's going to be an interesting election. I'm almost certain that the Conservatives will win: most predict a landslide, but I suspect they'll have an increased majority, but not quite as large as they hope. The Tories want to make the election about Brexit. The Labour party (at least, Corbyn, anyway) want to make it about the people versus the establishment. The Lib Dems, having nothing to lose (considering they were decimated in the previous election) will be running on the hope that people who voted Remain in the EU referendum last year will vote for them, as they are promising a second referendum. However, Tim Farron has ruled out a coalition with Labour, yet does not rule out a coalition with the Tories -- and we all remember what happened the last time they did that. I am paying £36000 in tuition fees instead of £12000, in part due to Nick Clegg's broken promise -- and I hope the voters do not forget that. The Greens are pushing for a liberal alliance, and I'm not quite sure what UKIP want to do -- their party's aims have already been achieved (Brexit), so it would be of no surprise to see them lose support to the Conservatives, who are the closest politically to UKIP (not including minor parties such as the BNP).

I will be voting for Mr. Corbyn's Labour, but I don't think he'll do very well. No matter how appealing some of his policies are (and indeed, the public tend to be in favour of his policies, on the whole), he is perceived as being weak and ineffectual, which has not been helped by the people in his own party constantly knifing him in the back, and that probably wouldn't change even if Corbyn came to power.

]]>Let n be a whole number,n>=2.Real numbers

with the sum s have the property that

Prove that

.

I have been trying to prove it for days but I had no luck.Please help me !

EDIT:Thanks,Bob!It was the first time I have ever tried to write sums in Latex]]>

Agreed!

Please don't misunderstand me. I found your earlier post very helpful. I couldn't see where 3/5 came from until then. The difficulty lies with the wording of the question. If it said " A class is chosen at random, and then a student within that class is chosen at random", then I would be happy with 3/5 as an answer.

But the question only says a student is chosen at random, so that makes each of the 45 students equally likely to be picked. Knowing a girl has been picked further reduces us to 22 of the students. The number of boys becomes irrelevant.

When exam questions are made in the UK, the paper is then checked by someone else independently, in order to try to avoid this sort of thing. I wonder which book this came from?

Bob

]]>I agree that a=0. But you'll have to consider y direction too if you want to complete this question,

I don't see where you got that value of k from. It must be wrong as k cannot be negative.

Bob

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