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What should be added to `4c (– a + b + c)` to obtain `3a (a + b + c) – 2b(a – b +

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

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Under the condition that the temperature remains constant, the volume of gas is inversely proportional to its pressure. If the volume of gas is 630 cubic centimetres at a pressure of 360 mm of mercury, then what will be the pressure of the gas if its volume is 720 cubic centimetres at the same

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

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The dimensions of a godown are 40 m, 25 m and 10 m. If it is filled with cuboidal boxes each of dimensions `2 m xx 1.25 m xx 1 m`, then the number of boxes will

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

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Four horses are tethered with equal ropes at 4 corners of a square field of side 70 metres so that they just can reach one another. Find the area left ungrazed by the

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

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A rectangular sheet of dimensions `25 cm xx 7 cm` is rotated about its longer side. Find the volume and the whole surface area of the solid thus

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

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `8a^3 –

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

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Factorise the expressions and divide them as directed: `(3x^2 – 48) -: (x –

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

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The area of a square is given by `4x^2 + 12xy + 9y^2`. Find the side of the

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

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If p + q = 12 and pq = 22, then find `p^2 +

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

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If a + b = 25 and `a^2 + b^2 = 225`, then find

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

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If x – y = 13 and xy = 28, then find `x^2 +

asked Jan 17, 2022 in 8th-maths by krutika (1.7k 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 purvi (1.8k points)

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The standard form for 32,50,00,00,000 is

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

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The value of `[3^(–1) xx 4^(–1)]^2` is

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

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`a^p xx b^q =

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

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The paper clip below has the indicated length. What is the length in standard form.

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

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The distance between the Sun and the Earth is `1.496 xx 10^8` km and distance between the Earth and the Moon is `3.84 xx 10^8` m. During solar eclipse the Moon comes in between the Earth and the Sun. What is distance between the Moon and the Sun at that particular

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

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Locate the points A (1,2), B (4,2) and C (1,4) on a graph sheet taking suitable axes. Write the coordinates of the fourth point D to complete the rectangle

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

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The following table gives the growth chart of a child. Height (in cm) 75 90 110 120 130 Age (in years) 2 4 6 8 10 Draw a line graph for the table and answer the questions that follow.(a) What is the height at the age of 5 years?(b) How much taller was the child at the age of 10 than at the age of 6?(c) Between which two consecutive periods did the child grow more

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

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