Questions by Simran

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Take suitable number of cards given in the adjoining diagram [G`(x xx x)` representing `x^2`, R `(x xx 1)` representing x and Y `(1 xx 1)` representing 1] to factorise the following expressions, by arranging the cards in the form of rectangles: (i) `2x^2 + 6x + 4` (ii) `x^2 + 4x + 4`. Factorise `2x^2 + 6x + 4` by using the figure.

asked Jan 18, 2022 in 8th-maths

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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 18, 2022 in 8th-maths

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`(-5/7)^(-5)` is equal

asked Jan 18, 2022 in 8th-maths

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`(–9)^3 -: (–9)^8` is equal

asked Jan 18, 2022 in 8th-maths

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The value of `(7^(–1) – 8^(–1))^(–1) – (3^(–1) – 4^(–1))^(–1)`

asked Jan 18, 2022 in 8th-maths

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`a^3 xx a^(–10)` =

asked Jan 18, 2022 in 8th-maths

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Find the value `[4^(–1) +3^(–1) +

asked Jan 18, 2022 in 8th-maths

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To add the numbers given in standard form, we first convert them into numbers with __

asked Jan 18, 2022 in 8th-maths

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`(–4)^(–4) xx (4)^(–1) =

asked Jan 18, 2022 in 8th-maths

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The value of `(1/4)^(-2)` is equal to

asked Jan 18, 2022 in 8th-maths

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asked Jan 18, 2022 in 8th-maths

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The usual form for `2 xx 10^(–2)` is not equal to

asked Jan 18, 2022 in 8th-maths

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asked Jan 18, 2022 in 8th-maths

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

asked Jan 18, 2022 in 8th-maths

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Express as a power of a rational number with negative exponent. (a) `(((-3)/2)^(-2))^(-3)` (b) `(2^5 -: 2^8) xx

asked Jan 18, 2022 in 8th-maths

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Simplify: -1. `(1/4)^(-2) + (1/2)^(-2) +

asked Jan 18, 2022 in 8th-maths

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An electron’s mass is approximately `9.1093826 xx 10^(–31)` kilograms. What is this mass in

asked Jan 18, 2022 in 8th-maths

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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 18, 2022 in 8th-maths

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There are 864,00 seconds in a day. How many days long is a second? Express your answer in scientific

asked Jan 18, 2022 in 8th-maths

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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 18, 2022 in 8th-maths

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