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2 years ago

Subtract 5x^2-8x-1 from -(5x^2 -x - 8).

Mathematics

2 answers:

geniusboy [140]2 years ago

8 0

Answer:

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Explanation:

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Or if you prefer:

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Subtract

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Step-by-step explanation:

have a good day

Jobisdone [24]2 years ago

3 0

Answer:

-10x² - 7x + 7

Step-by-step explanation:

Subtract:

-5x² - 8x - 1 - (5x² - x - 8)
-5x² - 5x² - 8x + x - 1 + 8
-10x² - 7x + 7

Remember: subtracting a negative number is adding that number

-Chetan K

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a village having a population of 4000, requires 150 litres of water per head per day. it has a tank measuring 20m x 15m x 6m. fo

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The water will last for 3 days

Solution:

Given that, village having a population of 4000, requires 150 litres of water per head per day

Let us first find the volume of tank

The tank measuring 20m x 15m x 6m

Length = 20 m

Breadth = 15 m

Height = 6 m

$volume\ of\ tank = length \times breadth \times height$

$Volume\ of\ tank = 20 \times 15 \times 6 = 1800$

Thus volume of tank is 1800 cubic meter

From given,

Water required per person per day = 150 liters

Therefore, water required for 4000 people per day is:

$\rightarrow 4000 \times 150 = 600000 \text{ liters }$

Convert to meters

$600000 \text{ liters } = 600000 \times \frac{1}{1000}\ m^3\\\\600000 \text{ liters } = 600\ m^3$

How many days will the water of this tank last?

$\text{Number of days water will last } = \frac{\text{volume of tank}}{\text{total water required per day}}$

$\text{Number of days water will last } = \frac{1800}{600} = 3$

Thus the water will last for 3 days

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Answer:

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