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How do I multiply two matrices together?

In order to multiply two matrices together, you must first have that the number of columns in the first matrix must be equal to the the number of rows in the second matrix. So if you wish to multiply matrix ...
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Answered by Iretunde S. • Maths tutor
19111 Views

Find the area of the region, R, bounded by the curve y=x^(-2/3), the line x = 1 and the x axis . In addition, find the volume of revolution of this region when rotated 2 pi radians around the x axis.

As we are looking to find the area under a curve we can use integration . The area under a curve with equation y = f(x), bounded by the lines x = a and x = b and the x axis can be expressed as:A = integral (...
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Answered by Henri F. • Maths tutor
9240 Views

Write down two reasons for using statistical models

There are many reasons for using statistical models. Some examples include: 1) To simplify a real world problem To improve understanding and describe a real world problem, for example understanding the relat...
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Answered by Laura D. • Maths tutor
12792 Views

The triangle ABC is such that AC=8cm, CB=12cm, angle ACB=x radians. The area of triangle ABC = 20cm^2. Show that x=0.430 (3sf)

From the equation of the area of a triangle, Area = 1/2 AC CB sin(C) 20 = 1/2 * 8 *12 * sin(x) => sin(x) = 0.416666... => x = 0.430 to 3sf
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Answered by Laura D. • Maths tutor
7741 Views

For rectangles of area 100 m^2 what is the perimeter of the rectangle with the smallest perimeter?

100=ab P=2a+2b P=2a+200/a dP/da=2-200/a^2 dP/da=0 implies 2=200/a^2 a^2=100 a=-10,10 a is a length so take positive a, a=10 so b=10 gives perimeter 40m Notice a=10 b=10 is a square Squares are rectangles of ...
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Answered by Daniel N. • Maths tutor
12079 Views