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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.

5+4+3=12. 72/12=6. 3(6)=18. 4(6)=24. 5(6)=30. area of right-angled triangle = 1/2 x b x h. 1/2 x 24 x 18= 1/2 x 24 x 9. 24x9 = 216.

RS
Answered by Rohan S. Maths tutor
2486 Views

Jessica buys 10kg of chocolate for £20. She divides them into 500g bags which she sells for £1.30 each. Given that Jessica sells all her chocolate, what is her percentage profit?

10kg/500g= 20 bags20 bags x £1.30= £26 (money made)£26-£20= £6 (profit)(£6/£20)*100= 30% (percentage profit)

DP
Answered by Devyani P. Maths tutor
2485 Views

solve (5 - x)/2 = 2x - 7 to find the value of x

first you want to remove the fraction, so must multiply both sides of the equation by 2, giving: 5 - x = 4x - 14. Then you want to group all of the x's on one side, so will move x to the right where the s...

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Answered by Samiyah S. Maths tutor
7917 Views

What is 3+4*5

Using BODMAS:4*5 = 203+20 = 23

ZX
Answered by Zieger X. Maths tutor
1816 Views

Make F the subject from this equation: C = (F-32)*(5/9)

C = (F-32)*(5/9)(9/5)C = F-32F = (9/5)C + 32

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Answered by Zieger X. Maths tutor
3067 Views

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