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3x + 2 = 11. what is x?

3x + 2 = 11 . 3x = 9 . x=3 .
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Answered by Emma V. • Maths tutor
16164 Views

y = (x/3) - 14. Rearrange this equation to make x the subject.

The aim of this question is to end up with 'x' standing by itself on one side of the equation. The key principle to achieve this is to understand that whatever you do to one side of the equation, you have to...
MG
Answered by Maximilian G. • Maths tutor
9831 Views

Dominik hires a satellite phone. His total hire charge is £860. For how many weeks did he hire the phone? (Total hire charge = No. of week X 90 +50)

Rearrange the formula so that it is equal to what the question is asking for (no. of weeks) What you have to do to one side you must do to the other! Total hire charge - 50 = No. of weeks X 90 (Total hire ch...
GK
Answered by Grace K. • Maths tutor
4654 Views

What is the definite integral of 2x^2 + 4x + 1 with a lower limit of 3 and a higher limit of 6?

When integrating we add one to the power of x and divide the number in front of the x by the new power for each part of the function. So 2x^2 becomes 2/3 x^3, 4x becomes 4/2 x^2, 1 becomes 1/1 x^1. Then we n...
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Answered by Ed L. • Maths tutor
3681 Views

A curve C is defined by the equation sin3y + 3y*e^(-2x) + 2x^2 = 5, find dy/dx

d(sin3y)/dx= 3cos3y*(dy/dx)d(3y e^(-2x))/dx = -6y e^(-2x) + 3(dy/dx) e^(-2x)d(2x^2)/dx = 4xd(5)/dx = 0so3cos3y (dy/dx) - 6y*e^(-2x) + 3(dy/dx) e^(-2x) + 4x = 0rearrange the equationdy/dx = (6y e^(-2x)-4x)/(3...
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Answered by Zhaohui Z. • Maths tutor
6088 Views