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Bogdan [553]
3 years ago
6

A survey of teens showed that teens in brooklyn, ny aged 13-18 spend 16.9 hours per week online. Teens in charlotte, nc spend 13

.2 hours per week online. Write and solve an addition equation to find the difference on time spent online by teens in these cities
Mathematics
1 answer:
creativ13 [48]3 years ago
8 0

To work this out we have to do 16.9  hours - 13.2 hours = 3.7 hours so there is a 13.7hour difference and to show it as an addition equation you do 13.2 hours + 3.7hours = 16.9 hours

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Indicate below whether the equation in the box is true or false 1/6 = to 6/12​
Vitek1552 [10]

Answer: 1/6 is not equal to 6/12 because 6/12 is 1/2 and 1/6 is less

Step-by-step explanation:

6 0
3 years ago
An article suggested that yield strength (ksi) for A36 grade steel is normally distributed with μ = 44 and σ = 5.0. (a) What is
aalyn [17]

Answer:

Step-by-step explanation:

Using normal distribution,

z = (x - μ)/σ

μ= mean = 44 and

σ = standard deviation= 5.0

a) The probability that yield strength is at most 40=

P( x lesser than or equal to 40)

z = (40-44)/5= -0.8

Looking at the normal distribution table,

P( x lesser than or equal to 40) =0.2119

b) P(x greater than 62) = 1 - P(x lesser than or equal to 62)

z = (62-44)/5= 3.6

Looking at the normal distribution table,

P(x greater than 62) = 1 -0.99984

= 0.00016

c)P( 42 lesser than or equal to x lesser than or equal to 62)

= P(x lesser than or equal to 62) - P( x lesser than or equal to 40)

= 0.99987-0.2119= 0.78797

d) What yield strength value separates the strongest 75% from the others.

To get x for strongest 75, we get the z value corresponding to 0.75 from the table

z = 0.675= (x-44)/5

x = 3.375+44 = 47.375

The rest is 25% = 0.25

we get the z value corresponding to 0.25 from the table)

z = -0.67 = (x-44)/5

-3.35= x -44

x = -44+3.35= 40.65

yield strength value that separates the strongest 75% from the others

=47.375-40.65= 6.725

3 0
3 years ago
What sentence represents this equation?
Marta_Voda [28]

Step-by-step explanation:

when 11 is decreased by a number, the result is 413

4 0
2 years ago
X + 2 + x = 22 I need to show my work. Please help. No false answers please.
Minchanka [31]
2x + 2 = 22
2x = 20
X = 10
3 0
3 years ago
Read 2 more answers
What is the middle term of (x + 5)(x + 2)
olasank [31]
(x + 5)(x + 2) = x^2 + 2x + 5x + 10 = x^2 + 7x + 10
middle term is 7x
6 0
3 years ago
Read 2 more answers
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