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If the area of a rectangle with sides 3cm and (4+x)cm is equal to that of a triangle with base of 2xcm and a height of 4cm, find x

First, if the question does not already have one, draw a diagram. Area of a rectangle is base * height and area of a triangle is 1/2 * base * height. As the two areas are the same, you know you can set the t...
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Answered by Alice K. • Maths tutor
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Work out the increase in price from £1.50 to £2.00 as a percentage.

To find the increase in price, you have to find the change in price and then compare that to the original price. The change in price is found by doing new price-old price (£2.00-£1.50=£0.50). You then find i...
AK
Answered by Alice K. • Maths tutor
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Fully simplify this equation; 3x^3 - x(3x+36) = 0

The first step is to multiply out the bracket 3x 3 - 3x 2 - 36x = 0 Then remove the common factor 3x 3x(x 2 - x - 12) = 0 Then factorise the bracket, by looking for two numbers which multiply to give -12, an...
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Answered by Rachel O. • Maths tutor
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Conjuguer le verbe "savoir" a l'imparfait

Endings are -ais, -ais, -ait, -ions, -iez, -aient Je savais Tu savais Il savait Nous savions Vous saviez Ils savaient
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Answered by Pjotr T. • French tutor
3893 Views

Describe the basic principles of ultrasound imaging (2 marks)

Ultrasound is any frequency above that of human hearing - around 20 kilohertz . Ultrasound imaging works by emitting a known intensity of ultrasound at a specific frequency, and capturing the reflected sound...
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Answered by Alex G. • Physics tutor
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