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xxTIMURxx [149]
3 years ago
5

Expression 3x²+4x-5x=-2​

Mathematics
1 answer:
Ierofanga [76]3 years ago
5 0

Answer:

15

Step-by-step explanation:

I'm assuming that you want me to express x as -2.

3(-2)^2+4(2)-5

3*4+8-5

12+8-5

15

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In order to determine the average price of hotel rooms in Atlanta, a sample of 64 hotels was selected. It was determined that th
deff fn [24]

Answer:

The decision rule is  

Fail to reject the null hypothesis

The conclusion is  

There is no sufficient evidence to show that the average room price is significantly different from $108.50

Step-by-step explanation:

From the question we are told that

   The sample size is  n = 64

    The average price is  \= x  = \$ 112

    The population standard deviation is  \sigma  = \$ 16

     The level of significance is  \alpha  = 0.05

    The population mean is  \mu = \$ 108.5

The null hypothesis is  H_o :  \mu = 108.50

The alternative hypothesis is  H_a  :  \mu \ne  108.50

Generally the test statistics is mathematically represented as

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

=>    z = \frac{112 - 108.50 }{ \frac{ 16}{\sqrt{64} } }  

=>    z = 1.75

From the z table  the area under the normal curve to the left corresponding to  1.75  is  

       P( Z >  1.75) = 0.040059

Generally  p-value is mathematically represented as

        p-value = 2 * P( Z >  1.75)

=>     p-value = 2 * 0.040059

=>     p-value = 0.08012

From the values obtained we see that  p-value  > \alpha hence

The decision rule is  

Fail to reject the null hypothesis

The conclusion is  

There is no sufficient evidence to show that the average room price is significantly different from $108.50

 

3 0
3 years ago
Find the area of the composite figure. <br><br> Please help me!!
elena55 [62]

Answer:

1,824 sq inches

Step-by-step explanation:

area of rectangle: 48 x 32 = 1536

area of triangle: (48 x 12) / 2 = 288

5 0
3 years ago
A 16 oz package of brown rice cost 79cents and 32oz package of white rice costs $3.49 which package is a better deal
tamaranim1 [39]

0.79 / 16 oz = 0.049 ( price for 1 oz of brown rice)


3.49 / 32 = 0.109 ( price for 1 oz of white rice)

 the price per oz of brown rice is cheaper then 1 oz of white rice so the brown rice is the better deal


3 0
3 years ago
Please solve 5q+6=2q-2+q.
son4ous [18]

Answer:

q= -4

Step-by-step explanation:

5q + 6 = 2 q- 2 + q

Collect like terms and simplify

5q - 2q - q =  - 2 - 6 \\ 2q =  - 8

Divide both sides of the equation by 2

\frac{2q}{2}  =  \frac{ - 8}{2}  \\

Simplify

q =  - 4

4 0
3 years ago
Read 2 more answers
What kind of distribution is shown in the frequency table?
nirvana33 [79]

Answer:

Skewed to the right

Step-by-step explanation:

As we can see in the table, the first three intervals have smaller frequency and last 4 intervals have higher frequency values. When the class intervals and frequency will be plotted on graph while taking class intervals on x-axis and frequency at y-axis, the graph will be skewed to the right because of the larger frequency values in the last intervals..

8 0
3 years ago
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