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3 teas and 2 coffees have a total cost of £7.80. 5 teas and 4 coffees have a total cost of £14.20. Work out the cost of one tea and the cost of one coffee.

Firstly we need to set up a simultaneous equation. 3t +2c =7.80 and 5t +4t = 14.20 Rearrange the first equation to find c on its own. 2c = 7.80 - 3t, c= (7.80 - 3t) / 2Then put the new value of c into the...

LB
Answered by Louise B. Maths tutor
4282 Views

How would you write a good comparative essay?

A good comparative essay should firstly and always address the question that you have been asked. You could either approach the essay question paragraph by paragraph, where you talk about the subject of t...

GD
Answered by Gabriella D. English tutor
1570 Views

What is immediate addressing?

The immediate addressing mode is when the opcode holds a numerical value. The first operand is the target register and the second operand is the constant numerical value.

FW
Answered by Freya W. Computing tutor
1902 Views

What's the difference between subjunctive and conditional moods?

We would use the subjunctive tense when talking about an event which is uncertain, possibilities. For example: "Il est possible qu'il soit là demain" (it's possible that he will be there tomorr...

IR
Answered by Isabel R. French tutor
2407 Views

Find the equation of the normal to the curve y = 2x^2 -3x +7 at the point x = 1.

Thinking about the normal, it is a line which cuts the curve at right angles, and so will have the form y = mx + c. Now at the point where x = 1, we know the y value from the curve's equation is y = 2(1)<...

MJ
Answered by Matthew J. Maths tutor
7899 Views

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