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makkiz [27]
4 years ago
15

Please I really need help with these

Mathematics
1 answer:
MrRissso [65]4 years ago
8 0

Answer:

Idk lol

Step-by-step explanation:

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The average commute time to work (one way) is 25 minutes according to the 2005 american community survey. if we assume that comm
brilliants [131]
Given that t<span>he average commute time to work (one way) is 25 minutes according to the 2005 american community survey. if we assume that commute times are normally distributed and that the standard deviation is 6.1 minutes, what is the probability that a randomly selected commuter spends less than 18 minutes commuting one way

The probability that a randomly selected number from a normally distributed dataset with a mean of μ and a standard deviation of σ is less than a value, x, is given by:

</span><span>P(X\ \textless \ x)=P\left(z\ \textless \  \frac{x-\mu}{\sigma} \right)

Given that the average </span><span>commute time to work (one way) is 25 minutes and that the standard deviation is 6.1 minutes,

the probability that a randomly selected commuter spends less than 18 minutes commuting one way is given by:

P(X\ \textless \ 18)=P\left(z\ \textless \  \frac{18-25}{6.1} \right) \\  \\ =P(z\ \textless \ -1.148)=\bold{0.1256}</span>
3 0
4 years ago
1. Solve for x, 5 (2x + 3) + 3 (x - 4) = 25 And one more question 2. The perimeter of a rectangle is 40m. The length of the rect
Svetllana [295]

Answer:

Step-by-step explanation:

1) 5(2x + 3) + 3(x -4) = 25

Use distributive property

5*2x + 5 *3 + 3*x - 3*4 = 25

10x + 15 + 3x - 12 = 25

Add like terms

10x + 3x +15 - 12 = 25

13x + 3 = 25

Subtract 3 form both sides

13x = 25 - 3

13x = 22

x = 22/13

x = 1\frac{9}{13}

2) Breadth = b m

Length = 5b - 4

Perimeter of rectangle = 40 m

2*(length + breadth) = 40    { Plug in the values of breadth & length}

2* (5b - 4 + b) = 40

2 * ( 6b - 4 ) = 40  

2*6b - 2 *4 = 40

12b - 8 = 40  { add 8 to both sides}

12b - 8 + 8 = 40 + 8

   12b = 48  { divide both sides by 12}

  12b/12 = 48/12

b = 4 m

Breadth = 4m

Length = 5*4 - 4 = 20 - 4 = 16 m        

5 0
3 years ago
Read 2 more answers
(72-y)+(26-X) when x=9,y=51
disa [49]

Answer:

38

Step-by-step explanation:

(72-51)+(26-9)

21+17

38

7 0
4 years ago
For the first 3% of Brenda's salary, her employer matches 100% of her 401(k)
astra-53 [7]

Answer:$3750

Step-by-step explanation:

6 0
4 years ago
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I need help on this I don’t know
slega [8]

Answer:

6

Step-by-step explanation:

In the y row, it decreases by 1 each time, so 1 decreased from 7 is 6.  To plot this, we take the x and y values from each column and graph it.  For example, the first row would be a point at (3, 8).

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3 years ago
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