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Explain lossless compression.

Lossless compression is when an image or document is reconstructed in a more efficient way using an algorithm to rewrite it. No data is lost from the file despite the compressed version taking up less memory...
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Answered by Freya W. • Computing tutor
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5 tins of soup have a total weight of 1750 grams. 4 tins of soup and 3 packets of soup have a total weight of 1490 grams. Work out the total weight of 3 tins of soup and 2 packets of soup.

Step 1 - Find the weight of 1 tin of soup: 1750 ÷ 5 = 350 Step 2 - Use this number (350) to find the weight of 1 packet of soup: (4x350) + 3P = 1490, 3P = 90, P=30Step 3 - Work out weight of 4 tins of soup a...
MC
Answered by Maddy C. • Maths tutor
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Solving quadratic equations using the factorisation method.

The Form of a quadratic equation where a ≠ 0ax 2 + bx + c = 0In order to solve we need to create one term made up of factors.One or more of these factors must equal zero. Questions we will work through: 10x ...
CE
Answered by Clem E. • Maths tutor
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What is the test for CO2 gas? Describe the overall reaction that takes place in the instance of a positive result and write its reaction equation.

The gas is passed through a container of Lime-water, if the Lime-water goes cloudy it means that the gas is CO2. The Carbon dioxide reacts with Calcium hydroxide to produce a Calcium carbonate precipitate an...
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Answered by Aarran O. • Chemistry tutor
3245 Views

Solve (x/4)-(2x/x+2)=1. Give your solutions to 2 decimal places.

Re-arrange to x^2-10x-8=0Using quadratic formula obtains two values, x=10.74 and x= -0.74
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Answered by Will H. • Maths tutor
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