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Show that 0.81 reocurring = 9/11

Let x = 0.8181818181... 100x = 81.81818181...100x - x = 81.81818181... - 0.8181818181(100 - 1)x = 8199x = 81x = 81/99x = 9/11
ED
Answered by Emily D. • Maths tutor
4173 Views

The rectangles A and B have perimeters of 94cm and 56cm as shown below (insert diagram). Rectangle A: base = 2x cm, height = 3y cm. Rectangle B: base = (x+6)cm, height = (y+4)cm. Use an algebraic method to calculate the area of each rectangle. (8 marks)

Formulas needed: Perimeter of rectangle = 2*(base + height) Area of rectangle = base * height. Using the information given we need to define the perimeter of A and B algebraically. Rectangle A: base = 2x, he...
UQ
Answered by Umar Q. • Maths tutor
4395 Views

How do you use the perfect tense?

The perfect tense is a way to talk about what has happened in the past. It is a way of expressing something that happens in the past generally, it's something you have done, probably many times and are likel...
NV
Answered by Nina V. • German tutor
2121 Views

How do you compare two different texts?

When comparing two texts there are a few things to consider:Form (what is it? what type of text? It could be: an article, blog, letter etc)Purpose (what is the author trying to do with the text? inform, pers...
NV
Answered by Nina V. • English tutor
3569 Views

How do you work out the circumference and area of a circle?

When working with circles we use which is a number that stays the same no matter how big the circle. The number starts with 3.1415.... and goes on forever, this number is programmed into the calculator, so w...
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Answered by Nina V. • Maths tutor
6341 Views