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Tom bought a full bag of coal. After one week the bag was 2/3 full. During the next week he used 1/4 of the remaining coal. How much is left?

This question is going to involve multiplying fractions. The question tells us that in the first week 1/3 of the coal was used, and 2/3 was left.Then in the second week the used 1/4 of the remainders, leavin...
BL
Answered by Brenda L. • Maths tutor
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How do you apply the multiplication law of indices?

Use the following method :X n x X m =X n+m explained using worked solution:what is X 3 x X 4 =Firstly write X 3 and X 4 individually X 3 = X x X x X X 4 = X x X x X x X X 3 x X 4 = X x X x X x X x X x X x XT...
AI
Answered by Adeel I. • Maths tutor
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How would I make S the subject of the formula in the equation V^2 = U^2 + 2AS

So the best way to solve subject of the formula questions is to try and separate the term you want to make the subject , in our case S , from the rest of the terms in the equation. In order to start we have ...
JR
Answered by Joshua R. • Maths tutor
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Solve the simultaneous equations: 4x + 2y = 26 and 3x + 3y = 21

Let eq 1 = 4x + 2y = 26 eq 2 = 3x + 3y = 21 Using the elimination method: You need to make either the xs or ys have the same constant term in both equations( sign does not matter). In this case, we will make...
DN
Answered by Dermot N. • Maths tutor
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A four sided pyramid, with a vertical height of 10cm and the base 4cmx4cm is placed on the top of a cylinder with radius 1.5cm and a height of 15cm. What is the exposed surface area?

Bottom end of cylinder = 1.5 2 x pi = 7.07cm 2 Cylinder shaft surface area = 3 x pi x 15 = 141.4cm 2 Top end of cylinder exposed = 0 Base of pyramid exposed = (4 x 4) - 7.07 = 8.9cm 2 Sides of pyramid = (use...
GW
Answered by George W. • Maths tutor
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