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Rearrange the following making a the subject: (a+2)/5 = 3a+b

(a+2)/5 = 3a+b ...first, we need to multiply both sides by 5

a + 2 = 5 (3a + b) ....to be able substract 3a from the right side we need to remove the bracket. We multiply the bracket by 5.

Answered by Katerina R. • Maths tutor

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Expand the following: (4x+7)(7x-2)

Using the FOIL (Firsts, Outsides, Insides, Lasts) mnemonic, you can expand these two brackets. F: 4x x 7x = 28x^2 O: 4x x -2 = -8x I: 7 x 7x = 49x L: 7 x -2 = -14 Therefore the expansion as a whole is: 28...

Answered by Gem P. • Maths tutor

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Expand (x-5)(x+6)

expand the brackets X² + 6x - 5x - 30 2) collect like terms X² + x - 30

Answered by Misha P. • Maths tutor

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Aidan, Emily and Seth shared some sweets in the ratio 2 : 7: 4 Seth got 16 more sweets than Aidan. Work out the total number of sweets they shared.

The difference in the ratio of Aidan's to Seth's sweets is 4-2=2 To find the scale factor to multiply up the ratio by, we divide the true difference in Aidan's and Seth's sweets by the difference in the r...

Answered by Eleni C. • Maths tutor

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