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leva [86]
3 years ago
9

Helpppppppppppp 33points

Mathematics
1 answer:
Evgen [1.6K]3 years ago
5 0

1st page: it is the fourth answer, y is less than or equal to 12

2nd page: it is the second answer, m is less than or equal to 450

3rd page: it is the first answer, x > -3

4th page: it is the fourth answer, b is more than or equal to 500

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Combined, Teresa and Janey have saved $345 dollars. Teresa has saved twice as much as Janey. How much money do they each have?
Tema [17]

Answer: Janey has $115, and Teresa has $230.

Step-by-step explanation:

Set x be the money that Janey have, then Teresa have 2x.

x + 2x = 345

      3x = 345

         x= $115

2x= 2(115)= $230

6 0
3 years ago
Joan had 259 dollars to spend on 8 books. after buying them she had 11 dollars. how much did each book cost?
motikmotik
All 8 books cost $31
5 0
3 years ago
CAN SOMEONE PLEEAASE HELP WITH ME with these six questions I will love you forever
DaniilM [7]

Answer:

1. Congruent(SAS)

2. Congruent(AAS)

3. Congruent(HL)

4. Not congruent

5. Congruent(SSS)

6. Congruent(AAS)

4 0
3 years ago
Assume that the Poisson distribution applies and that the mean number of hurricanes in a certain area is 6.9 per year. a. Find t
VLD [36.1K]

Answer:

a) 9.52% probability​ that, in a​ year, there will be 4 hurricanes.

b) 4.284 years are expected to have 4 ​hurricanes.

c) The value of 4 is very close to the expected value of 4.284, so the Poisson distribution works well here.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

In which

x is the number of sucesses

e = 2.71828 is the Euler number

\mu is the mean in the given time interval.

6.9 per year.

This means that \mu = 6.9

a. Find the probability​ that, in a​ year, there will be 4 hurricanes.

This is P(X = 4).

So

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

P(X = 4) = \frac{e^{-6.9}*(6.9)^{4}}{(4)!}

P(X = 4) = 0.0952

9.52% probability​ that, in a​ year, there will be 4 hurricanes.

b. In a 45​-year ​period, how many years are expected to have 4 ​hurricanes?

For each year, the probability is 0.0952.

Multiplying by 45

45*0.0952 = 4.284.

4.284 years are expected to have 4 ​hurricanes.

c. How does the result from part​ (b) compare to a recent period of 45 years in which 4 years had 4 ​hurricanes? Does the Poisson distribution work well​ here?

The value of 4 is very close to the expected value of 4.284, so the Poisson distribution works well here.

5 0
3 years ago
Determine if the following pairs of lines are parallel, perpendicular, or neither (HINT: Look at slopes).
GarryVolchara [31]

Answer:

Neither

Step-by-step explanation:

The slopes are not opposite and they are not equal either

line up 2x+3y=42 and -3x +2y=16

2x+3y=42=-3x+2y=16

get each term on one side and isolate.

If this is not possible, you have your answer. Another way to do this is graphing it and seeing if the two lines intersect, and if they do, if they make a right angle

4 0
3 years ago
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