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Help me to set up the equation, because I'm confused.

$ 19, but is it correct?

The price in the shop is $ 20 by how much % you how to reduce the price to get 15 So 20= to 100%. if you take away 20 from 15 you get 5 So if you take 100-5 =95 So is it 95% if it is wrong explain please

James welcomes Professor Robert Winston to perform some science experiments, one involving nitrogen and 4000 ping pong balls. His new children's books "Maker...

I 'am stuck at , what fraction of the shoes were size 4 I know the frequency is missing. The frequencies are 8,9,9,3,1. My thinking you how to add the frequencies and put 4 over it. Explain to me if I'm wrong. Thanks in advance

In class we do Science and I have faced with the problem between Weight and mass. Tutor told us that the weight is the force that causes everything to move. Mass is the kg .Why then, people ask other people what weight are you? Explain please. Thanks

Thank a million

Can you help me with this question. 3x=15 Do you have to divide both sides by 3 which, is x=5 Am I right. If not explain please, Thank-you

Pure mathematics is, in its way, the poetry of logical ideas. ..