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(i) Find the gradient of the straight line passing through the points: (0,3) and (9,21). (ii) Write down the equation of the line in form y = mx + c

(i) To find the gradient of a straight light, we take any two (different) points on the straight line and compute the change in Y divided by the change in X. So here this is; (21-3)/(9-0) = 18/9 = 2. So t...

Answered by Charlie G. • Maths tutor

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Solve the simultaneous equations; 2x + y = 18; x + 3y = 19.

Start by selecting a variable to eliminate from the equations. --> Select x in this case.Take the second equation and multiply by 2. --> 2x + 6y = 38Subtract the first equation from this answer. --&...

Answered by Mark A. • Maths tutor

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How can you factorise x^2-9

First, we notice how there is only an 'x²' term and a number in this expression. Also notice that the number, 9, is a square number. Whenever you have an expression that looks like 'x²

Answered by Rebecca A. • Maths tutor

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State the 2 important functions of the pancreas and its role in digestion?

The pancreas has two main functions: an exocrine function that helps in digestion and an endocrine function that regulates blood sugar. The pancreas contains endocrine glads which produces enzymes to aid ...

Answered by Amala J. • English tutor

3323 Views

When is the passé composé used and when do I use avoir or être?

The passé composé is used to describe completed or repeated actions that were done in the past. It is translated into English as either the past simple tense (e.g. I ate) or the present perfect tense (e.g...

Answered by Serena V. • French tutor

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