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On a packet of brown rice it says 'When 60g of rice is cooked, it will weigh 145g.' If Katy has 100g of brown rice, how much will it weigh when cooked?'

Find by what ratio the weigh of rice has increased. If the rice increases in weight from 60g to 145g, the factor by which it increases is: (145/60) = 2.4166... Multiply the amount of rice Katy has by this fa...
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Answered by Ben O. • Maths tutor
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What is the difference between classical and operant conditioning?

Classical conditioning is a reflex response which involves learning an association between a naturally relevant stimulus such as food (called the uncondtioned stimulus) and a stimulus which is not naturally ...
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Answered by Olivia R. • Psychology tutor
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Solve: 6x + 3 = 3x + 9

There are a few ways to tackle this particular style of problem. First off we can try doing it without using any bracket theory and just focus on the raw numbers (a somewhat simpler approach). Step 1: We're ...
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Answered by Calum G. • Maths tutor
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What is photosynthesis?

Photosynthesis is the process by which plants make glucose. Light energy is absorbed by chorophyll which is a green substance found in chloroplasts in some plant cells and algae. This light energy is used to...
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Answered by Olivia R. • Biology tutor
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prove that (3x+1)^2 - (3x-1)^2 is a multiple of 4 for all positive integer values of x

(3x + 1) 2 = 9x 2 + 6x + 1 (3x - 1) 2 = 9x 2 - 6x + 1 (9x 2 + 6x + 1) - (9x 2 - 6x + 1) = 12x 12x/4 = 3x Therefore for all positive integers of x the result is a multiple of 4
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Answered by Katie J. • Maths tutor
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