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How do you solve the simultaneous equations 3x+y=5 and x-y=3?

The aim of this question is to find x and y by combining these two equations. There are two ways of solving simultaneous equations, elimination and substitution. Elimination can only be used when there ar...

Answered by Andrew N. • Maths tutor

6185 Views

How do I decide whether to use the perfect or the imperfect tense?

The perfect and imperfect tenses are both used to describe a past tense in French. The imperfect tense is often a more descriptive tense and is used to set the scene and 'frame' the more punctual perfect ...

Answered by Daniel W. • French tutor

5463 Views

The finite region bounded by the x-axis, the curve with equation y = 2e^2x , the y-axis and the line x = 1 is rotated through one complete revolution about the x-axis to form a uniform solid. Show that the volume of the solid is 2π(e^2 – 1)

The volume of revolution, V, is given as 2π∫ydx Substituting in the equation and limits gives as follows: V = 2π∫2e^2x dx between 0 and 1 Integrating this gives V = 2π[e^2x] between 0 and 1 Applying the ...

Answered by Michael C. • Further Mathematics tutor

7272 Views

Creating string from multiple strings(or characters)

In Python it is possible to add two strings or characters by using + sign string_a = "" for i in range(10): string_a += str(i) Now string_a would have "0123456789" value. If you add on...

Answered by Dominykas S. • Python tutor

4428 Views

Explain how the human body maintains blood glucose levels within a narrow range

As part of homeostasis, it is vital for the human body to maintain blood glucose levels within a narrow range. The 2 main hormones involved are insulin, when glucose levels are too high, and glucagon, whe...

Answered by Sally H. • Biology tutor

12853 Views