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Solve the simultaneous equations to find x and y: 3x + 5y = 10 , 5x + 4y = 8

15x + 25y = 5015x + 12y = 24 y = 2x = 0
DK
Answered by Deo-Gratias K. • Maths tutor
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How to expand double brackets?

Use the FOIL method, first, outside, inside, last. 1) F: The first term in the first bracket multiplies the first term in the second bracket. 2) O: The first term in the first bracket jumps outside to multip...
HT
Answered by Hannah T. • Maths tutor
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Work out 60% of 70

1% of a number is that number divided by 100. So 60% of a number is 60 times that number divided by 100.In this case, we want 60% of 70. So, we do (70 60)/100. This is a rather big fraction, but we can simpl...
EW
Answered by Elise W. • Maths tutor
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1. a) the equation of a line is y=A^x. A is the point where the line intersects the y axis. Find A. then Q15 https://revisionmaths.com/sites/mathsrevision.net/files/imce/1MA1_3H_QP.pdf

a) on the y axis, x=0. sub x=0 into y=A^xtherefore y=A^0 = 1 so A is at (0,1) 15) WILL USE DIAGRAM so firstly, we need an equation linking the area of the triangle to the information we are given(two sides a...
RD
Answered by Reena D. • Maths tutor
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Why can you not divide expressions by common factors?

With equations, e.g. 4x = 12, the 4x variable has a given value. This means you can apply the same changes to both sides (at the same time). For example, both sides can be divided by 4 to give x=3 However ex...
FM
Answered by Fatima M. • Maths tutor
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