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Simplify the following, 125^-2/3

1. The minus sign indicates that the answer is a reciprocal meaning basically 1 over. 2. Next, on inspection of the fraction, the 2 on top means that you square the number, times it by itself. 3. The 3 on th...
CB
Answered by Cameron B. • Maths tutor
3588 Views

Differentiate dy/dx ((2x^3)+(x^2)-(4x)+7)

Differentiate each term in the equation separately then put then put the differentiated equation back together.First we start with (2x 3 ):2 x 3 = 6 and 3-1=2 so we get the differentiated term of 6x 2 then w...
TR
Answered by Theodora R. • Maths tutor
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Solve the simultaneous equations: 3x + y = 19 and x - 2y = -3

First rearrange x - 2y = -3 by adding 2y to each side to give x = -3 + 2ySubstitute this into the first eq. to give 3(-3 +2y) + y = 19Expand brackets first: -9 + 6y + y = 19Rearrange and simplify by collecti...
JM
Answered by Jessica M. • Maths tutor
5831 Views

How can I write a good introduction

An introduction begins an essay in the most clear and concise way possible. It's important to immediately state what texts you'll be analysing and refer to any authors using their whole name the first time. ...
KL
4422 Views

Explain the trend in reactivity of the elements in Group 7.

The Halogens decrease in reactivity as you descend through the group. The atoms increase in size and Mr as you go down the group. Therefore their outer electrons are further away from the positive charge of ...
KS
Answered by Kirsten S. • Chemistry tutor
9405 Views