Question

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Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

6. Area of rhombus = ½×d1×d2

684 cm²=½×24 cm×d2

684 cm²×2/24cm =d2

57cm=d2

or d2 = 57cm

8. m²-mn-7m+7n

m²-7m+7n-mn

m(m-7)+n(7-m)

m(m-7)-n(m-7)

(m-n) (m-7)

9. You get : 675=3×3×3×5×5 Here, there are three 3s and two 5s. Thus the three 3s shall give a 3 on performing the cube root, what would remain shall be the two 5s.

Common sense, that another 5 is missing, which when multiplied to the set, shall give us the perfect cube. i.e ;

3×3×3×5×5 times another 5

Then comes a perfect cube, 3375, which is 15 cubed. So the number required to make 675 a perfect cube is 5.

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