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Solve the inequality 4m +3 > 15

4m +3 >15 -3 from each side 4m >12 divide each side by 4 to get m on its own m>3
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Answered by Alice N. • Maths tutor
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A train travels for 240 minutes to travel a distance of 220 miles. Assuming the trains speed is constant, what is the train's speed in miles per hour?

For this we require the distance-speed-time triangle which is defined as follows:speed = distance/time.However for the we need to convert the time into hours as that's what the question requires.there is 60 ...
CD
Answered by Cameron D. • Maths tutor
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How do I find the minimum turning point of a parabola?

1.differentiate the equation using the rule: y=x n , dy/dx= nx n-1 2.set dy/dx to =0 as this is where a minimum point occurs (where the gradient of the graph is = 0)3.solve for x4.then, to find the y coordin...
FN
Answered by Felix N. • Maths tutor
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Express x^2+4x-12 in the form (x+a)^2 +b by completing the square.

Completing the square of a function is sometimes used to find the stationary points on a curve, and also to solve when equaling zero. To complete the square firstly we have to halve the middle value of the p...
IB
Answered by Imogen B. • Maths tutor
7349 Views

Simplify (3x^2-8x-3)/(2x^2-6x)

(3x + 1)/(2x)I would use the whiteboard to explain the process
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Answered by Romeo E. • Maths tutor
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