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The length of a rectangle is five times the width. The area of the rectangle is 180cm^2. Work out the width of the rectangle.

Lets start off by calling the width of rectangle 'w'. The length of the rectangle is 5 times the width, or '5w'. The area of a rectangle can be worked out by multiplying the length by the width, i.e. 5w x w=...
HW
Answered by Hannah W. • Maths tutor
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Find the gradient of the line on which the points (1,3) and (3,4) lie and find the y-coordinate of the line at x = 7.

The gradient is m = (y1-y0)/(x1-x0) = (4-3)/(3-1) = 1/2. So the equation of the line is y= x/2 + c where c is a constant. To find the constant, c, we will input one of the given coordinates (1,3). This shows...
RL
Answered by Ryan L. • Maths tutor
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What is the difference between ionic and covalent bonding?

With ionic bonding, two ions of the opposite charge are attracted to each other to form the bond. With ionic bonding, it is the strong electrostatic force of attraction between ions. While, covalent bonding ...
SV
Answered by Shravya V. • Chemistry tutor
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Explain how dyes are separated by paper chromatography.

For the technique of chromatography, there are two 'phases', the stationary phase and the mobile phase. In paper chromatography, the stationary phase is the paper and the mobile phase is the water. The paper...
AR
Answered by Amy R. • Chemistry tutor
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What is the electronic structure of sulphur

2,8,6
HR
Answered by Hannah R. • Chemistry tutor
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