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Find the value of 4a + 3b when a=2 and b=5

This question is asking us to place a number in the place of their corresponding letter, so as the letter a is attached to the number two, whenever we see the letter a in the equation we would replace it wit...
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Answered by Roisin M. • Maths tutor
15619 Views

Express 5cosx - 3sinx in the form Rcos(x+a).

cos(x+a)=cosxcosa-sinxsina so cosa=5 sina=3 which means tana=3/5 a=0.54 RADIANS R=sqrt(5 2 +3 2 ). =sqrt(34) so sqrt(34)cos(x+0.54)
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Answered by Elizabeth H. • Maths tutor
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What is the difference between a vector and a scalar quantity?

A scalar quantity is one that has a magnitude (size) only, and no associated direction in which that size 'points'. A good example of a scalar is temperature, because temperature has a size (for example 20 d...
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Answered by Frazer N. • Physics tutor
6547 Views

Simultaneously solve the equations 3x+2y=36 and 5x+4y=64

The easiest way to solve a simultaneous equation is by the method of substitution. First of all, we take the first equation, and rearrange it so that it is in terms of y. Or, in other words, rearrange it so ...
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Answered by Finlay S. • Maths tutor
12442 Views

What do I need to do to get into medical school?

Medical schools are always looking for well-rounded individuals. They are looking for those with academic successes but that isn't the only criteria that will be looked at. They want people that have shown t...
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