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To show a number N is even, we must be able to express it in the form N = 2x for some other whole number x. Let's try to manipulate the given expression to see if we can put it in this form. By expanding ...
Line A has a gradient of 6, because it is in the form y = mx + c, where m=6.Line B can be rearranged to y= 6x - 7, so the gradient is also 6.The gradient of both lines is the same, so they are...
1st step: find the derivative dy/dx of the given equation2nd step: now equate the obtained derivative to 0 because this is precisely the situation in which the graph changes direction (the derivative dy/d...
x2 +10x-3=(x+5)2-25-3= (x+5)2 -28
If we call the unknown number 'x' we can put it in to an equation to work it out as we known 5/3 of the number is 162.5x/3 = 162then times each side of the equals symbol by 5 to get (3x/5) 5 = 162LMAnswered by Lucy M. • Maths tutor13676 Views
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