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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
4677 Views

How to conjugate the imperfect tense?

In Spanish we use the imperfect tense to describe an ongoing event in the past. For example, 'She used to talk a lot'. For verbs ending in 'ar', you take off the 'ar' and add the correct imperfect ending e.g...
RB
Answered by Rachel B. • Spanish tutor
2523 Views

What are imaginary numbers, and why do we bother thinking about them if they don't exist?

When studying anything in Mathematics, it is very easy to get lost in the technical details and lose sight of what everything really means on a conceptual level - that's why these kinds of questions are so f...
SF
3752 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...
EL
Answered by Ed L. • Maths tutor
3709 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...
ZZ
Answered by Zhaohui Z. • Maths tutor
6115 Views