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The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5. Work out the area of the triangle.

As we know the ratio of the sides is 3:4:5, label the sides x,y and z respectively. Side x is of length (3/12)*72, side y is of length (4/12)*72 and side z is of length (5/12) 72. Giving, x = 18cm, y = 24cm,...
VS
Answered by Viresh S. • Maths tutor
3089 Views

use the subjunctive mood to express happiness, anger, probability and desire giving examples of each

me llena de alegría que tu hayas casado con élme pone muy enfado que perdieras mi reloj, tiene mucho valor senitmentaldudo que sepa como esquiarquiero que vengas conmigo
JB
Answered by James B. • Spanish tutor
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Find the turning points of the curve y = 3x^4 - 8x^3 -3

Differentiate to get:dy/dx = 12x^3 -24x^2Factorise and set equal to 0:12x^2(x-2) = 0Solve to get x = 2 and x =0.
DC
Answered by Daniel C. • Maths tutor
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What are the differences between sound waves and electromagnetic waves?

Propagation: Sound waves are longitudinal , meaning that the vibrations occur parallel to the direction of propagation (travel). Electromagnetic waves are transverse , meaning that the vibrations occur perpe...
WL
Answered by Wendy L. • Physics tutor
77436 Views

How do you solve these simultaneous equations? 4x + 5y = 8; 2x + 3y = 5

By elimination:(eq1) 4x + 5y = 8(eq2) 2x + 3y = 5By eye you can see that 2x multiplied by 2 is 4x.If we multiply the whole of (eq2) by 2 we get:(eq2.1) 4x + 6y = 10(eq1) 4x + 5y = 8If we subtract the whole o...
WL
Answered by Wendy L. • Maths tutor
5934 Views