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What are the values of x and y?

a) 3x + 5y = 26 b) 2x + 2y = 12 Step One : We need to find a way to equate either the x terms of the y terms in each equation. Multiply equation a) by 2 and equation b) by 3 to form the following equations. ...
EA
Answered by Emily A. • Maths tutor
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Differentiate: y = xsin(x)

This is a function which is in the form, y = f(x)g(x) It's the product of two functions and so we must make use of the product rule . This is a simple formula which you have to remember: dy/dx = f'(x)g(x) + ...
OR
Answered by Oliver R. • Maths tutor
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Differentiate x^2

To differentiate x^2 Step 1) whatever the number on the power, put that in front of x. Step 2) Then minus one (-1) from the power Therefore, by putting the number on the power in front (which is 2) and deduc...
AM
Answered by Anjana M. • Maths tutor
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Solve this pair of simultaneous equations to find x and y

(1) 2x - 5y = 11(2) 3x + 2y = 7-----------------------Multiply equation (1) by 3 & Multiply equation (2) by 2 to give equal values for x:(3) 6x - 15y = 33(4) 6x + 4y = 14-----------------------Take equat...
JB
Answered by James B. • Maths tutor
5081 Views

Find the equation of the straight line which passes through the point (0, 3) and is perpendicular to the straight line with equation y = 2x.

We know that a straight line has a general formula: y = mx+c, where m is the gradient of the line and c is the y-intercept; so, we are looking to find m and c. The line passes through the point (0,3) so x=0 ...
FM
Answered by Flavian M. • Maths tutor
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