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Solve the following set of simultaneous equations: 3x + 2y = 15 & 9x + 4y = 1

Label your equations 1 and 2. Look to eliminate one of your variables to create a third equation with only one variable. To do this multiply the first equation by 2 to obtain: 6x + 4y =30 *Label as equation ...
CA
Answered by Chris A. • Maths tutor
6906 Views

How important are quotes in an essay? How do I go about learning/applying them?

Learning and implementing quotations are and always will be a necessary evil in academic writing. However, whether it be from the primary source or a secondary critic, they are invaluable in supporting and v...
JD
10591 Views

How does electrical activity of the heart cause the heart to pump?

The sinoatrial (SA) node is a group of specialized cells which sit in the wall of the right atrium. The SA node sets the pace of your heart and is therefore called your pacemaker. SA node sets this pace by g...
NE
Answered by Nithya E. • Biology tutor
3273 Views

Find the equation of the tangent at x=1 for the curve y=(4x^2+1)^3

The tangent is the straight line passing through x=1, touching the curve only at that point. For x=1, y=(4+1)^3=125 Using the chain rule we obtain dy/dx = 3 8x (4x^2+1)^2. To then get the gradient of the tan...
JH
Answered by Jacob H. • Maths tutor
4025 Views

If the fourth term in an arithmetic sequence is, u4 = 12.5, the tenth is u10 = 27.5. Find the common difference and the 20th term.

The equations for an arithmetic sequences are 1) Un = u1 + (n - 1)d 2) Sn = n/2(2*u1 + (n-1)d) 3) Sn = n/2(u1 + un) The first step is to calculate the common difference, d. This is done using the first equat...
NK
Answered by Ndalukile K. • Maths tutor
3080 Views