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Simplify `{(1/3)^(-2)-(1/2)^(-3)} ÷

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `x^2 –

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `x^2 – 6x +

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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If m – n = 16 and `m^2 + n^2 = 400`, then find

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Verify the following: `(a + b + c) (a^2 + b^2 + c^2 – ab – bc – ca) = a^3 + b^3+ c^3 –

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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Verify the following: `(a + b) (a + b) (a + b) = a^3 + 3a^2b + 3ab^2 +

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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Verify the following: `(a^2 – b^2) (a^2 + b^2) + (b^2 – c^2) (b^2 + c^2) + (c^2 – a^2) + (c^2 + a^2) =

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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Find the value of a, if `8a = 35^2 –

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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`(2^-3)^2 xx (3^-2)^3`

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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`(–9)^3 -: (–9)^8` is equal

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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For a non-zero rational number z, `(z^-2)^3` is equal

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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`a^3 xx a^(–10)` =

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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Very large numbers can be expressed in standard form by using _________

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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Express `3^(–5) xx 3^(–4)` as a power of 3 with positive

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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Find the product of the cube of (–2) and the square of

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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This table shows the mass of one atom for five chemical elements. Use it to answer the question given. Element Mass of atom (kg) TitaniumLeadSilverLithiumHydrogen `7.95 × 10^(–26)` `3.44 × 10^(–25) ``1.79 × 10^(–25)``1.15 × 10^(–26)``1.674 × 10^(–27) `

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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At the end of the 20th century, the world population was approximately `6.1 xx 10^9` people. Express this population in usual form. How would you say this number in

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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Use the properties of exponents to verify that each statement is true. (a) `1/4(2^n) = 2^(n-2)` (b) `4(n-1) = 1/4(4)^n` (c) `25(5^(n–2)) =

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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Two machines can be hooked together. When something is sent through this hook up, the output from the first machine becomes the input for the second. (a) Which two machines hooked together do the same work a `( xx 10^2)` machine does? Is there more than one arrangement of two machines that will work? (b) Which stretching machine does the same work as two `(xx 2)` machines hooked together?

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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What will the following machine do to a 2 cm long piece of chalk?

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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