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ICE Princess25 [194]
2 years ago
11

The following data set shows the price, in dollars, of a milkshake at five different restaurants. What are the mean absolute dev

iation and population standard deviation of this data set? Round to the nearest tenth if necessary.
4, 2, 9, 14, 6

mean absolute deviation =


standard deviation =
Mathematics
1 answer:
Jobisdone [24]2 years ago
8 0
Mean absolute deviation= 3.6

Standard deviation=4.19
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How do I solve 4/9+9/2 and write my answer as a mixed number?
jenyasd209 [6]

9 has factors of 3*3.

2 is prime, so no factors.

from those two denominators, we can get the LCD of hmmm simply their product, namely 18.

\bf \cfrac{4}{9}+\cfrac{9}{2}\implies \stackrel{\textit{using the LCD of 18}}{\cfrac{(2)4+(9)9}{18}}\implies \cfrac{8+81}{18}\implies \cfrac{89}{18}\implies 4\frac{17}{18}

now, recall that, to get the mixed fraction, we divide 89 ÷ 18, the quotient goes up front, the "4", and the remainder is the one atop, the "17".

8 0
3 years ago
Find the first term and common ratio for the geometric sequence a2 =2.5,a4=62.5
fenix001 [56]

Answer:

a1 = 0.5; common ratio = 5

Step-by-step explanation:

Let the common ratio = r

a2 = 2.5

a3 = 2.5r

a4 = 2.5r * r = 2.5r^2

We are told a4 = 62.5, so

2.5r^2 = 62.5

Divide both sides by 2.5

r^2 = 25

r = 5

a2 = a1 * r

a1 = a2/r = 2.5/5 = 0.5

Answer: a1 = 0.5; common ratio = 5

6 0
3 years ago
What is the inverse of x^2-4x+5
lisabon 2012 [21]

we are given

f(x)=x^2-4x+5

Since, we have to find inverse of this function

step-1: we set f(x)=y

y=x^2-4x+5

step-2: switch x and y

x=y^2-4y+5

step-3: Solve for y

y^2-4y+(5-x)=0

now, we can use quadratic formula

y=\frac{4+\sqrt{4^2-4(5-x)} }{2}

f^{-1}(x)=\sqrt{x-1}+2

or

f^{-1}(x)=-\sqrt{x-1}+2..............Answer

6 0
3 years ago
Some help here please...List the first 6 multiples of 4 and 7...(if you want explain how it's work ) FAST
Korvikt [17]

4 - 4,8,12,16,20,24,28

7- 7,14,21,28,35,42,49

7 0
3 years ago
Solve the following word problem. A man travels from town X to town Y at an average rate of 60 mph and returns at an average spe
sladkih [1.3K]

Answer:

  • d = 1650 miles

Step-by-step explanation:

Let the distance be d

<u>Then the time in travel is</u>

  • d/60 one way, d/50 on return

<u>The round trip would take 1/2 hours longer if the average speed was 55 mph</u>

  • d/60 + d/50 = 2d/55 + 1/2
  • d/60 + d/50 - 2d/55 = 1/2

LCM(60,50,55) = 11*12*5*5 = 3300

  • 55d/3300 + 66d/3300 - 120d/3300 = 1/2
  • d/3300= 1/2
  • d = 1650 miles

4 0
3 years ago
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