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A rectangle has an area of 20 cm^2. Its length and width are enlarged by scale factor 3. Find the area of the enlarged rectangle.

Area Scale Factor = (Scale Factor)²

If the scale factor is 3 then:

ASF = 3²

ASF = 9

Area of enlarged rectangle = 20x9

Area of enlarged rectangle = ...

Answered by Melanie U. • Maths tutor

4103 Views

Rearrange the formula: m = 2ab/4c+b to make b the subject

m = 2ab/4c+b [times both sides by (4c+b)]

m(4c+b) = 2ab (expand the bracket)

4cm+bm = 2ab (take away bm from both sides)

4cm = 2ab - bm (take out b as the common factor)

4cm = ...

Answered by Melanie U. • Maths tutor

5600 Views

The line L passes through the points (-2,3) and (6,9). How do I find the equation of the line that is parallel to L and passes through the point (5,-1)?

Find the gradient of line L. The gradient can be defined as the "change in y" divided by the "change in x". For this situation, the "change in y" would be 9 - 3 = 6. Th...

Answered by Justin C. • Maths tutor

13990 Views

Prove that an angle subtended by an arc is double at the centre then at the perimeter.

After drawing, bisect the perimeter angle in two from the centre. We now have two isosceles triangles with the sides the same length (1 radius from the centre). We know that 2 angles in each triangle add ...

Answered by Matthew P. • Maths tutor

7033 Views

I'm struggling with approaching questions in Maths, I just don't know where to start. What should I do?

My approach will take you step by step through each type of question you find difficult. Maths (quite usefully) is very procedural. This means if you follow the instructions step by step you'll find you'r...

Answered by Gus R. • Maths tutor

4222 Views