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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 Simran (1.8k points)

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The reciprocal of `(2/5)^-1`

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

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The multiplicative inverse of `(-5/9)^-99`

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

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If x be any integer different from zero and m, n be any integers, then `(x^m)^n` is equal

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

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For a non-zero integer x, `(x^4)^(–3)` is equal

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

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Express `16^(–2)` as a power with the base

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

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Divide 293 by 10,00,000 and express the result in standard

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

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Find the value of `x^(–3)` if `x = (100)^(1–4) -:

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

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Find the multiplicative inverse of `(–7)^(–2) -:

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

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If `53^(x–1) -: 25 = 125`, find the value of

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

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Some migratory birds travel as much as 15,000 km to escape the extreme climatic conditions at home. Write the distance in metres using scientific

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

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The number of red blood cells per cubic millimetre of blood is approximately 5.5 million. If the average body contains 5 litres of blood, what is the total number of red cells in the body? Write the standard form. (1 litre = 1,00,000

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

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`(16 xx 10^2 xx 64)/(2^4 xx

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

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The cells of a bacteria double itself every hour. How many cells will there be after 8 hours, if initially we start with 1 cell. Express the answer in

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

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Astronomy The table shows the mass of the planets, the sun and the moon in our solar system. (a) Write the mass of each planet and the Moon in scientific

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

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Investigating Solar System The table shows the average distance from each planet in our solar system to the sun. (a) Complete the table by expressing the distance from each planet to the Sun in scientific

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

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While studying her family’s history. Shikha discovers records of ancestors 12 generations back. She wonders how many ancestors she has had in the past 12 generations. She starts to make a diagram to help her figure this out. The diagram soon becomes very complex. (a) Make a table and a graph showing the number of ancestors in each of the 12

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

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For the following repeater machines, how many times the base machine is applied and how much the total stretch is?

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

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