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A right angled triangle has sides of length 3 and length 4, what is the length of the hypotenuse?

using pythagorus ( c^2 = b^2 + a^2) and plugging in 3 and 4 as a and b we get c^2 = 3^2 + 4^2 = 9 + 16 = 25. Taking the positive square root as sides can't be negative we get c = 5
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Answered by Kaitlyn R. • Maths tutor
3279 Views

Sketch the inequality x^2 - x - 12 > y on a set of axes.

First thing to note: this is a sketch question , and we're asked to sketch a quadratic (because there's an x 2 term). So we need to factorise (put the brackets in) to work out where it crosses the x-axis. Th...
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Answered by Tom P. • Maths tutor
3268 Views

Find the equation of the line perpendicular to y=2x-1 that passes through (2,0)

The first step is to remember that the equation of every straight line can be expressed as:y=mx+cSo we need to find the values of m and c. We have a rule that tells us the gradient of perpendicular lines- th...
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Answered by Will R. • Maths tutor
8670 Views

Change the subject of the formula F=(t^2+4b)/c to b.

b = (Fc-t^2)/4
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Answered by Mayez H. • Maths tutor
6965 Views

A line passes through the points (-2,1) and (4,4). Find the equation of the line in the form y = mx + c

In the form y = mx + c, m stands for the slope (or gradient) of the line, and c for its y-intercept. Since we are given two points that are on the line, we can figure out its slope by looking at the vertical...
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Answered by Filip B. • Maths tutor
4475 Views