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Solve the following simultaneous equations: 3a + 2b = 36 equation ( 1), and 5a + 4b = 64 equation (2)

This question can be answered by the elimination method, substitution method or graphically. I find the elimination method easiest, especially when you can see that the coefficient of a variable (in this cas...
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Answered by Alejandro G. • Maths tutor
6490 Views

There are 30 kg of potatoes in a wheelbarrow. A farmer adds some carrots into the wheelbarrow. The total weight of the wheelbarrow now is 110 pounds. What weight of carrots did the farmer put into the wheelbarrow? 1 kg = 2.2 pounds

First of all, you want to get all your data in the same units, so either in pounds or kg. Here, as you are told that 1kg = 2.2 pounds, it seems easier to convert the amount of potatoes from 30kg into pounds,...
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Answered by Alejandro G. • Maths tutor
5598 Views

Integrate, by parts, y=xln(x),

First, we need to separate the RHS as components of U and V. Using the LATE (logarithms, algebra, trigonometry, exponentials) technique, we see that logarithms have priority to algebra hence U = lnx and dV/d...
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Answered by Makhdoom S. • Maths tutor
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Describe the structures of proteins

Primary structure - a sequence of amino acids in a polypeptide chain. They are joined together by peptide bonds. The sequence of amino acids determines the rest of the proteins structures. Secondary structur...
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Answered by Phoebe M. • Biology tutor
4340 Views

How do you form the superlative in French?

The superlative is used to describe the upper or lower bound of a quantity, e.g. the highest and the lowest, the best and the worst. In French, there are 5 ways of using the superlative that you need to lear...
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Answered by Iona S. • French tutor
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