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Maths
GCSE

A cylinder has a radius of 4 cm and volume of 800 cm3. A similar cylinder with the same height has a volume of 200 cm3. Find the radius of the smaller cylinder.

Firstly, we have to understand how the radius of the first cylinder was used to calculate its volume. Then we can use that understanding to then use the information we have about the other cylinder to cal...

Answered by Mika Erik M. Maths tutor
2332 Views

Can you explain how to find straight line equations?

Straight line equations always come in the form y=mx+c, where m is the gradient of the line (how steep it it) and c is the point where the line crosses the y axis (the y intercept).If you are given two po...

Answered by Judy Q. Maths tutor
1892 Views

Solve the following quadratic equation.

x2+7x+10 = 0 factorise this into the form (x+a)(x+b)=0 by finding out what 2 numbers multiply to make 10 and add up to 7. the 2 numbers that fit this criteria are 5 and 2 so (x+5)(x+2)=0, if we...

Answered by Amber G. Maths tutor
2248 Views

Expand the brackets: (x + 5)(x - 3)?

An easy way to remember how to expand double brackets is using FOIL. FOIL stands for First, Outer, Inner, and L...

Answered by Daniel W. Maths tutor
2641 Views

Calculate the interest on borrowing £40 for 3 years if the compound interest rate is 5% per year.

The method for finding compound interest is: Original Amount x MultiplierTime
So, from the question we know that: Original Amount= 40, Time= 3 years, so we say 3
Next we need to work ...

Answered by Kathleen B. Maths tutor
2660 Views

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