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All the angles in a triangle add up to 180 degrees.

Therefore, 60 + (5y - 40) + (2y + 20) = 180.

This can be simplified to 7y +40 = 180.

And simplified again to 7y = 140, which then m...

A stationary wave forms when there are two waves of equal frequency (or wavelength) travelling in opposite directions, passing through one another. Interference occurs, with constructive interference at a...

For Type A: 10kg/1.25kg = 8 bags, therefore for 10kg it costs 8 x £1.50 = £12.00.

For Type B: 1 bag used to cost £6.60 but now has 15% off =>15% of £6.60 => £6.60 x 0.15 = £0.99 => So one ...

For a noun that ends in a consonant, simply add 'a' For a noun ending in 'й', replace it with 'я' For a noun ending in a soft sign 'ь', replace it with 'я' For plurals, the blanket rule is to add 'ов', UN...

The rule for indirect statements in latin is nice and simple - you have to remember to put the subject in the accusative, and the verb in the infinitive. You have to include the subject of the indirect st...