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posledela
3 years ago
12

Solve the liner system by graphing. Y=4x. x+y= -5

Mathematics
1 answer:
Darya [45]3 years ago
3 0
(-1,-4) is where the equations Y=4x and x+y=-5 intersect.
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In 2014, 85 percent of households in the United States had a computer. For a randomly selected sample of 200 households in 2014,
DochEvi [55]

Answer:

The mean of C is 170 households

The standard deviation of C, is approximately 5 households

Step-by-step explanation:

The given parameters are;

The percentage of households in the United States that had a computer in 2014 = 85%

The size of the randomly selected sample in 2014, n = 200

The random variable representing the number of households that had a computer = C

Therefore, we have;

The probability of a household having a computer P = 85/100 = 0.85

Let

Therefore;

The mean (expected) number in the sample, μₓ, = E(x) = n × P is given as follows;

μₓ = 200 × 0.85 = 170

The mean of C = μₓ = 170

The variance, σ² = n × P × (1 - P) = 200 × 0.85 × (1 - 0.85) = 25.5

Therefore;

The standard deviation, σ = √(σ²) = √(25.5) ≈ 5.05

The standard deviation of C, σ ≈ 5 households (we round (down) to the nearest whole number)

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3 years ago
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Fittoniya [83]

Answer:

3

Step-by-step explanation:

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By the inscribed angle theorem, arc PA measures 62 degrees.

<u>Part 2</u>

Angles inscribed in the same arc are congruent, so angle PRA measures 31 degrees.

<u>Part 3</u>

Diameters form semicircles, and the arc of a semicircle measures 180 degrees, so arc PAR measures 180 degrees.

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Subtracting arc PA from arc PAR, we get arc AR measures 118 degrees.

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Gravity pulls you to earth at velocity of 9.8 m/s. In the first 40 seconds, Jason would fall (9.8) x (40) = 392 meters.
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Can you simplify the square root of -8
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Answer:

I don't think so.

Step-by-step explanation:

But what do I know? XD

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