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Malignant tumors are cancerous, harmful tumors whereas benign are non-cancerous. Tumors are caused by a mutation which causes uncontrolled cell division.

4:3 Working: 960:720 (divide by 10) 96:72 (divide by 8 as 8 is common multiple of both 96 and 72 (should know this from times tables)) 12:9 (divide by 3) 4:3 simplifying slowly and in small steps r...

2x² - 6x

3 for £2,

he needs 30 pens so he needs to buy the deal 10 (30/3) times, meaning he needs to spend 10 * £2 = £20

5 for £3,

he needs 30 pens so he needs the deal 6 (30/5) times, meaning...

7/12 + 1/12 = 8/12

8/12 can be simplified to 2/3

therefore the answer is 2/3 as this is the most simplified version of the fraction 8/12