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Can two shelves of 0.72 meters long each store 50 30mm wide textbooks?

First, convert the units so you can compare more easily. 0.72m = 72cm = 720mm So 1 shelf is 720mm and 1 textbook is 30mm wide. To find the maximum number of books that can be stored on a shelf, you divide th...
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Answered by Valerie L. • Maths tutor
3911 Views

What is a Sankey diagram and how do we use it?

A Sankey Diagram can be used to represent the energy usage and efficiency of anything. There are 3 main parts of Sankey diagram, the start (left side), the arrow heads that peel off facing upwards or downwar...
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Answered by Alex W. • Physics tutor
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how does aveoli allow for a more efficient gas exchange in mammals?

avoli are small chambers that branvh off from the bronchioles in the lungs, and is where gas exchange directly occurs. these have quite an ireegular shape and contain many fold in its structure, this allows ...
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Answered by Cristina S. • Biology tutor
4158 Views

When given an equation with both letters and numbers on each side of the equals sign, for instance 4x +3 = 5x - 3, how do you know what to do first?

With equations like this the most important thing is that you end up with all the numbers on one hand side and all the letters on the other side. People often think there is a 'right' and 'wrong' order to do...
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Answered by Sophie K. • Maths tutor
3561 Views

Solve these simultaneous equations: 2x + y = 7, and 3x - y = 8. Do so by 1) Eliminating an Unknown and 2) Substitution.

The number 'in front of' an unknown is called the Coefficient. When eliminating an unknown, look to see whether the coefficients of x are the same in both equations, or if the coefficients of y are the same....
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Answered by Ellie H. • Maths tutor
3970 Views