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3 years ago

(−5.2)+(−3.8)–{(−1.2)–[(−0.5)–(−0.7)]}

2 answers:

6 0

The answer is -7.6.

Start with the innermost grouping:

(-5.2)+(-3.8)-{(-1.2)-[(-0.5)-(-0.7)]}

Subtracting a negative is the same as adding a positive:
(-5.2)+(-3.8)-{(-1.2)-[(-0.5+0.7)]}
(-5.2)+(-3.8)-{(-1.2)-[0.2]}

Now start with the next inner grouping:
(-5.2)+(-3.8)-{-1.4}

Again, subtracting a negative is the same as adding a positive:
(-5.2)+(-3.8)+1.4

Add the first two together:
-9.0+1.4

Adding the last two, we get -7.6.

balandron [24]3 years ago

5 0

Answer:-7.6

Step-by-step explanation:

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Flight time = 2* ascendent time

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sin(45) = Voy / Vo => Voy = Vosin(45) = 25.5 m/s * (√2) / 2 = 18.03 m/s

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4 years ago

How do you solve this equation -6x + 7y =13 and -6x +8y =20 using elimination

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Answer:

x=6,y= 7

Step-by-step explanation:

-6x +7y= 13

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3 years ago

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4 years ago

A certain region currently has wind farms capable of generating a total of 2500 megawatts (2.5 gigawatts) of power. Complete p

marishachu [46]

Answer:

The correct answer is A. 7,665'000,000 kilowatt-hours per year and B. 766,500 households.

Step-by-step explanation:

1. Let's review the information provided to us for solving the questions:

Power capacity of the wind farms = 2,500 Megawatts or 2.5 Gigawatts

2. Let's resolve the questions a and b:

Part A

Assuming wind farms typically generate 35% of their capacity, how much energy, in kilowatt-hours, can the region's wind farms generate in one year?

2,500 * 0.35 = 875 Megawatts

875 Megawatts = 875 * 1,000 Kilowatts = 875,000 Kilowatts

Now we calculate the amount of Kilowatts per hour, per day and per year:

875.000 Kw generated by the farms means that are capable of produce 875,000 kw per hour of energy

875,000 * 24 = 21'000,000 kilowatt-hours per day

21'000,000 * 365 = 7,665'000,000 kilowatt-hours per year

Part B

Given that the average household in the region uses about 10,000 kilowatt-hours of energy each year, how many households can be powered by these wind farms?

For calculating the amount of households we divide the total amount of energy the wind farms can generate (7,665'000,000 kilowatt-hours) and we divide it by the average household consumption (10,000 kilowatt-hours)

Amount of households = 7,665'000,000/10,000 = 766,500

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3 years ago