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Sedaia [141]
3 years ago
6

Do anybody know this ???

Mathematics
1 answer:
vaieri [72.5K]3 years ago
7 0

Answer:

option D

Step-by-step explanation:

18 1/5 + 22 2/5 +40 1/5

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Alberto is snowboarding down a mountain with a constant slope. the slope he is on has an overall length of 1560 feet. the top of
Olenka [21]

The slope of the equation is calculated as:

 \frac{h_2-h_1}{t_2-t_1}=m

Where h_2 is the height of the upper part of the slope and h_1 is the height of the low er part.

 m=\frac{4000-4600}{24-0}

m=-25

So, the equation of the line is:

h-4600=-25(t-0)

h=-25t+4600

With this equation we can find the height of Alberto after having passed 10 sec.

h(10)=-25 (10)+4600\\h(10)=-250+4600\\h(10)=4350

 After 10 seconds Alberto is 350 feet from the bottom of the slope.

Alberto's speed is:

v=\frac{1560ft}{24s}=65ft/s

The speed in miles per hour is:

v=65ft /s*\frac{1 mile}{5280 ft}*\frac{3600s}{1 hour}\\v=44.32 miles/h

4 0
4 years ago
Online jewelry sales have increased steadily. In 2003 sales were approximately 2 billion dollars and in 2013 they were approxima
7nadin3 [17]

Answer:

Prediction model for Jewelry sales 7.15 billion = 2 billion {1+r%}¹⁰

Jewelry sales in 2015 = 8.343 billion dollars

Step-by-step explanation:

The compound interest expression is used to describe the increase in Jewelry sales

A = P{1+r%}ⁿ = 7.15billion = 2billion {1+r%}¹⁰

Where A= Jewelry sales in 2013

P Jewelry sales in 2010

r= annual rate increase

n= number of years

r is then calculated from 7.15billion = 2billion {1+r%}¹⁰

Therefore 3.575billion = {1+r%}¹⁰

¹⁰√3.575 × 10⁹ = 1+r%

9.022514830966 = 1+r%

r% =  8.022514830966%

Jewelry sales by 2015 = A = P{1+r%}ⁿ where n= 2

A = 7.15×10⁹{1+8.022514830966/100}² = 8.34370097596 × 10⁹

Therefore Jewelry sales in 2015 = 8.343 billion dollars

7 0
3 years ago
What is 13/6 as a mixed number
Vilka [71]
2 1/6 is the fraction in mixed numbers
5 0
3 years ago
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Suppose you draw a card from a​ well-shuffled deck of 52 cards. What is the probability of drawing a 7 or a queen​?
o-na [289]

Answer:

\frac{8}{52} = 0.15384615384 = 15.38%

Step-by-step explanation:

There are 4 7 cards and 4 queen cards so,

\frac{4}{52} + \frac{4}{52} = \frac{8}{52}

6 0
3 years ago
find the size of each sample needed to estimate the difference between the proportions of boys and girls under 10 years old who
Alex Ar [27]

Answer:

sample

Step-by-step explanation:

6 0
3 years ago
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