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masya89 [10]
2 years ago
5

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

Mathematics
2 answers:
geniusboy [140]2 years ago
8 0

Answer:

−

2

x

2

+

6

x

+

4

Explanation:

(

3

x

2

+

8

x

−

7

)

−

(

5

x

2

+

2

x

−

11

)

(

3

x

2

−

5

x

2

)

+

(

8

x

−

2

x

)

+

(

−

7

+

11

)

−

2

x

2

+

6

x

+

4

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Or if you prefer:

...

.

.

3

x

2

+

8

x

−

7

...

.

.

5

x

2

+

2

x

−

11

−−−−−−−−−−−−

←

Subtract

.

−

2

x

2

+

6

x

+

4

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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allochka39001 [22]

The water will last for 3 days

<em><u>Solution:</u></em>

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

<em><u>Let us first find the volume of tank</u></em>

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

<em><u>Therefore, water required for 4000 people per day is:</u></em>

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Convert to meters

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

<em><u>How many days will the water of this tank last?</u></em>

\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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