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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...
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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...
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Answered by Elise W. • Maths tutor
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The line AB has equation 5x + 3y + 3 = 0. The point with coordinates (2k + 3, 4 -3k) lies on the line AB. How do you find the value of k.

This kind of question requires correct substitution by setting the x in the original equation equal to the x value of the point ( 2k+3) and setting the y value of the original equation to the y value of the ...
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Answered by Kelvin N. • Maths tutor
4873 Views

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...
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Answered by Reena D. • Maths tutor
5182 Views

Solve the equation (z+i)^*=2zi+1.

STEP 1: What the questions asks us is to find z that solves the equation given. Since z is a complex number, we need to determine both its real and imaginary parts. Hence, we begin by writing z in terms of i...
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Answered by Tutor179220 D. • Maths tutor
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