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CaHeK987 [17]
3 years ago
11

PLZ HELP!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
bezimeni [28]3 years ago
8 0

Answer:

If soccer balls are sold for $2.05 or $14.61 each, the store will break even but will not make a profit.

Inessa05 [86]3 years ago
4 0

Answer:

D.) If soccer balls are sold for $2.05 or $14.61 each, the store will break even but will not make a profit.

Step-by-step explanation:

Let us assume x = selling price of each soccer ball

y = daily profit earned from selling of soccer balls

Given that

Y= -6x^2+100x-180

where,

a = -6

b = 100

c = -180

Now we have to applied the formula which is as follows

x = \frac{-b\pm\sqrt{b^2-4ac}}{2a}$

= \frac{-100\pm\sqrt{100^2-4\times -6\times -180}}{2\times -6}$

= \frac{-100\pm\sqrt{10,000 - 4,320}}{-12}$

= \frac{-100\pm\sqrt{5.680}}{-12}$

= \frac{-100 + 75.3658}{-12}$

= \frac{24.6342}{-12}

x^1 = -2.05285

Now

x^2  = \frac{-100 - 75.3658}{-12}$

= \frac{- 175.3658}{-12}

x^2 = 14.6138

Based on this the option D is most appropriate as per the given situation

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John is stuck downtown Atlanta and has used is cell phone to order an Uber. The pick up fee is $20 with an additional charge of
Masteriza [31]

Answer:

$25 + (0.25 * 30)

Step-by-step explanation:

Given that :

Cost of Uber :

Pick up fee = $25

Additional charge = 0.25 cent per mile driven

Cost of 30 mile trip :

Pickup fee + (additional charge * number of miles)

$25 + (0.25 * 30)

25 + 7.5

= $32.5

3 0
3 years ago
Final exam scores are normally distributed with a mean of 74 and a standard deviation of 6. Approximately, what percentage of fi
notka56 [123]

Answer:

81.86%

Step-by-step explanation:

We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.

First of all we will find z-score using z-score formula.

z=\frac{x-\mu}{\sigma}

z=\frac{68-74}{6}

z=\frac{-6}{6}=-1

Now let us find z-score for 86.

z=\frac{86-74}{6}    

z=\frac{12}{6}=2        

Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.

Using normal distribution table we will get,    

P(-1

P(2>Z)=.97725  

We will use formula P(a to find the probability to find that a normal variable lies between two values.

Upon substituting our given values in above formula we will get,

P(-1

P(-1

Upon converting 0.81859 to percentage we will get

0.81859*100=81.859\approx 81.86

Therefore, 81.86% of final exam score will be between 68 and 86.  


3 0
3 years ago
Can you please help me with this question?​
kotykmax [81]

Answer:

2(2x+5)=8x-18

2x+5=4x-9

2x=14

x=7

MN=2*7+5=19

Step-by-step explanation:

5 0
3 years ago
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Vesna [10]
D.{(-5,4),(2,-3),(1,-6),(0,1)}
7 0
2 years ago
PLEASSSSE HELP
ddd [48]
You answer is 6a minus 4b+11

3 0
3 years ago
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