Recent questions tagged chapter9

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Living on your own: Sanjay is looking for one-bedroom apartment on rent. At Neelgiri apartments, rent for the first two months is 20% off. The one bedroom rate at Neelgiri is Rs 6,000 per month. At Savana appartments, the first month is 50% off. The one bedroom rate at Savana appartments is Rs 7000 per month. Which appartment will be cheaper for the first two months? By how

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

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For an amount, explain why, a 20% increase followed by a 20% decrease is less than the original

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

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Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. For example, if you apply sunscreen with SPF 15, you get 1 minute of UV rays for every 15 minutes you stay in the sun. 1. A sunscreen with SPF 15 allows only `1/15` of the sun’s UV rays. What per cent of UV rays does the sunscreen abort? 2. Suppose a sunscreen allows 25% of the sun’s UV rays. a.

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

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A real estate agent receives Rs 50,000 as commission, which is 4% of the selling price. At what price does the agent sell the

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

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With the decrease in prices of tea by 15% Tonu, the chaiwallah, was able to buy 2 kg more of tea with the same Rs 45 that he spent each month on buying tea leaves for his chai shop. What was the reduced price of tea? What was the original price of tea?

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

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Below is the Report Card of Vidit Atrey. Vidit’s teacher left the last column blank. Vidit is not able to make out, in which subject he performed better and in which he needs improvement. Complete the table to help Vidit know his comparative performance.

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

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Sita is practicing basket ball. She has managed to score 32 baskets in 35 attempts. What is her success rate in per centage?

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

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During school hours, Neha finished 73% of her homework and Minakshi completed 5/8 of her homework. Who must finish a greater per cent of

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

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Rain forests are home to 90,000 of the 2,50,000 identified plant species in the world. What per cent of the world’s identified plant species are found in rain

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

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Madhu’s room measures 6m × 3m. Her carpet covers 8m2. What per cent of floor is covered by the

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

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The human body is made up mostly of water. In fact, about 67% of a person’s total body weight is water. If Jyoti weights 56 kg, how much of her weight is

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

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The per cent of pure gold in 14 carat gold is about 58.3%. A 14 carat gold ring weighs 7.6 grams. How many grams of pure gold are in the

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

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A student used the proportion `n/100 = 5/32`to find 5% of 32. What did the student do

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

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The table shows the cost of sunscreen of two brands with and without sales tax. Which brand has a greater sales tax rate? Give the sales tax rate of each brand. Cost (in Rs) Cost+Tax (in Rs) 1. X (100 gm) 2. Y (100 gm) 7062 7565

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

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Add: 7xy + 5yz – 3zx, 4yz + 9zx – 4y , –3xz + 5x –

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

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Subtract `5x^2 – 4y^2 + 6y – 3` from `7x^2 – 4xy + 8y^2 + 5x –

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

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Identify the terms, their coefficients for each of the following expressions. `5xyz^2 – 3zy`

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

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Identify the terms, their coefficients for each of the following expressions. `1 + x +

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

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Identify the terms, their coefficients for each of the following expressions. `4x^2y^2 – 4x^2y^2z^2 +

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

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Identify the terms, their coefficients for each of the following expressions. 3 – pq + qr –

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

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