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The mean mass of a squad of 19 hockey players is 82 kg A player of mass 93 kg joins the squad. Work out the mean mass of the squad now.

"Mean" stands for "average", so if you add the mass of all the players together, then divide by the amount of players, you get 82kg. [ (number of players) x (mean mass) = (sum of mass) ] ...
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Answered by Henry H. • Maths tutor
10456 Views

Solve the simultaneous equations: 2x - y = 1, 3x + y = 14

Make y the subject of equation 1:y = 2x - 1Substitute this value of y into equation 2:3x + (2x - 1) = 14Simplify:5x - 1 = 14Solve for x:x = 3Substitute this value of x into original equation:2(3) - y = 1Simp...
SB
Answered by Stephen B. • Maths tutor
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solve simultaneous equations: 2x² + 3y² = 14 , x = 2y-3

x=1y=2 x= -29/11y=2/11
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Answered by alasdair g. • Maths tutor
7641 Views

Make s the subject of the formula

v 2 = u 2 + 2as. The question is asking us to make s the subject of the formula and so we must find the equation equal to s. The golden rule of the rearranging topic is whatever you do to one side of the equ...
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Answered by Samuel H. • Maths tutor
7417 Views

Find the roots of the equation: x^2-2x-3=0

The point at which the explanation of the solution is started, will depend on the level of understanding of the student and previous knowledge on the subject A root is a numerical value that represents the s...
AP
Answered by Andreas P. • Maths tutor
7472 Views