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mario62 [17]
3 years ago
11

On which of the following lines does point (-8,31) lie?

Mathematics
2 answers:
Mama L [17]3 years ago
3 0
The answer is A.
..............
Nataly [62]3 years ago
3 0
A. y = - 4x - 1

because

subtitute x = - 8 to the equation:

-4· (-8) - 1 = 32 - 1 =31 ⇒ (-8; 31)
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The times a fire department takes to arrive at the scene of an emergency are normally distributed with a mean of 6 minutes and a
Kitty [74]

Answer:

Step-by-step explanation:

Let x be the random variable representing the times a fire department takes to arrive at the scene of an emergency. Since the population mean and population standard deviation are known, we would apply the formula,

z = (x - µ)/σ

Where

x = sample mean

µ = population mean

σ = standard deviation

From the information given,

µ = 6 minutes

σ = 1 minute

the probability that fire department arrives at the scene in case of an emergency between 4 minutes and 8 minutes is expressed as

P(4 ≤ x ≤ 8)

For x = 4,

z = (4 - 6)/1 = - 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.023

For x = 8

z = (8 - 6)/1 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.98

Therefore,

P(4 ≤ x ≤ 8) = 0.98 - 0.23 = 0.75

The percent of emergencies that the fire department arrive at the scene in between 4 minutes and 8 minutes is

0.75 × 100 = 75%

8 0
3 years ago
A rectangle that has a width of 18 inches and a length of 36 inches has a diagonal of 43 inches. True or false
astra-53 [7]

Answer:

fals it is smaller than that

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3 years ago
If I earned $1 every 3 months, how many months until I earn $1000?
KatRina [158]

Answer: 250 years

Step-by-step explanation:

12/3=4

4 x $1 = $4 per year

$1000/4=250

250 years

3 0
3 years ago
Read 2 more answers
751,447 rounded to the nearest 100,000
Neko [114]

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