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yawa3891 [41]
3 years ago
10

A friend bought 2 boxes and 8 notebooks for school, it cost him $11 He went back to the store the same day to buy school supplie

s for his younger brother. He spent $11.25 on 3 boxes of pencils and 5 notebooks. How much would 7 notebooks cost?
Mathematics
1 answer:
Marina86 [1]3 years ago
4 0

Answer:

  $5.25

Step-by-step explanation:

If the friend tripled the first purchase and subtracted twice the second purchase, he would have the cost of 3·8-2·5 = 14 notebooks. 7 notebooks would cost half that amount:

  (3·$11 -2·11.25)/2 = $5.25 . . . . . cost of 7 notebooks

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Suppose that the number of calls coming per minute into an airline reservation center follows a Poisson distribution. Assume tha
dusya [7]

Answer:

0.0497 is the required probability.

Step-by-step explanation:

We are given the following information in the question:

Mean number of calls = 3 calls per minute

The number of calls coming per minute is following a Poisson distribution.

Formula:

P(X =k) = \displaystyle\frac{\lambda^k e^{-\lambda}}{k!}\\\\ \lambda \text{ is the mean of the distribution}

We have to evaluate

P( x =0) =  \displaystyle\frac{\lambda^k e^{-\lambda}}{k!}\\\\P(x = 0) = \frac{3^0e^{-3}}{0!} = 0.0497

0.0497 is the probability that no calls are received in a given one-minute period.

7 0
3 years ago
Which expression is equivalent to 1/4(5x+6)?
ExtremeBDS [4]

9514 1404 393

Answer:

  C:  3/4x + 3/4 + 3/4 + 2/4x

Step-by-step explanation:

The various expressions simplify to ...

  given: 5/4x +6/4

  A: 46/4x

  B: 2/4x +6/4

  C: 5/4x +6/4

  D: 2/4x +11

5 0
3 years ago
Jason has a garden that is 4 1⁄2 feet by 3 1⁄4 feet. He wants to put a decorative fence around it to deter the local rabbits. If
Tatiana [17]

Answer:

Cost: 11.625 dollars

Step-by-step explanation:

If the fence is placed around the garden, that would be represented by the perimeter of the garden. Knowing the dimensions of the garden (4.5 feet by 3.25 feet) you can find the perimeter as such:

2(4.5 feet) + 2(3.25 feet) =

9 feet + 2(3.25 feet) =

9 feet + 6.5 feet =

Perimeter of Garden: 15.5 feet

Knowing the perimeter, you can calculate the cost of the fence by multiplying the perimeter by the cost of fencing per foot:

15.5 * 0.75 =

Total Cost for Fence: 11.625 dollars

8 0
3 years ago
Help and pls explain :)) is appreciate it
Nostrana [21]

Answer:

57 degrees

Step-by-step explanation:

due to corresponding angles

3 0
3 years ago
(04.02 LC)
Mademuasel [1]

using the points, the x is Soda and the Y is the grape juice

 for (1,2) 1 soda to 2 juices

(2,4) 2 sodas to 4 juices


so the ratio is 2 juices to every 1 soda which is a 2/1 ratio

4 0
4 years ago
Read 2 more answers
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