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Solve algebraically: 6a+b = 16 and 5a - 2b = 19

6a + b = 16 (1) 5a - 2b = 19 (2) (1) x 2: 12a + 2b =32 (1) + (2): 12a + 2b + 5a - 2b = 32 + 19 = 51 17a = 51 a = 51 / 17 = 3 Substitue a = 3 back into (1): (6 x 3) + b = 16 18 + b = 16 b = 16 - 18 = - 2 Subs...
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Answered by Niva R. • Maths tutor
3602 Views

Find the general solution to the differential equation '' (x^2 + 3x - 1) dy/dx = (2x + 3)y ''

Now although this might seem like quite a complex question at first, it's a little less intimidating when we take a while to look at it- you might notice that we can seperate x and y terms like so: 1/y dy = ...
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Answered by Sam T. • Maths tutor
8019 Views

When do I use être in the perfect tense?

The most popular and useful way of remembering when to use être in the perfect tense, is the MRS VANDERTRAMP list: Monter, Retourner, Sortir, Venir, Arriver, Naitre, Descendre, Entrer, Rester, Tomber, Rentre...
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Answered by Kiah B. • French tutor
2959 Views

To what extent was the popularity of the Nazi Party the main reason for Hitler's appointment as Chancellor in January 1933?

Here I am imagining a student has found difficulty both in how to structure their answer to an exam question such as this, and is also struggling with understanding the content of the question. Prior to our ...
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Answered by Eleanor B. • History tutor
6066 Views

You read this comment in a magazine. 'Oggi mi rendo conto che, in realtà, il problema più grosso è che ci sono troppe macchine in centro. Non c’è una zona pedonale e l’aria è molto inquinata.' Which problem is mentioned?

A. Traffic accidents B. Noise pollution C. Air pollution - C is the correct answer.
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Answered by Riccardo D. • Italian tutor
3248 Views