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s2008m [1.1K]
3 years ago
7

What is the value of thi expression when d=3?

Mathematics
2 answers:
Sergeeva-Olga [200]3 years ago
6 0
The answer is b because it is (7(3))2+10 so you would first start off with 7x3 which is 21 and then multiply that by 2 which is 42. You then add ten making it 52.
Leni [432]3 years ago
4 0

Answer:

73

Step-by-step explanation:

Givens

d = 3

Equation 7d^2 + 10 = ?

Solution

7*3*3 + 10                

7*9 + 10

63 + 10 = 73

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1- The Canada Urban Transit Association has reported that the average revenue per passenger trip during a given year was $1.55.
serg [7]

Answer:

0.5

0.9545

0.68268

0.4986501

Step-by-step explanation:

The Canada Urban Transit Association has reported that the average revenue per passenger trip during a given year was $1.55. If we assume a normal distribution and a standard deviation of 5 $0.20, what proportion of passenger trips produced a revenue of Source: American Public Transit Association, APTA 2009 Transit Fact Book, p. 35.

a. less than $1.55?

b. between $1.15 and $1.95? c. between $1.35 and $1.75? d. between $0.95 and $1.55?

Given that :

Mean (m) = 1.55

Standard deviation (s) = 0.20

a. less than $1.55?

P(x < 1.55)

USing the relation to obtain the standardized score (Z) :

Z = (x - m) / s

Z = (1.55 - 1.55) / 0.20 = 0

p(Z < 0) = 0.5 ( Z probability calculator)

b. between $1.15 and $1.95?

P(x < 1.15)

USing the relation to obtain the standardized score (Z) :

Z = (x - m) / s

Z = (1.15 - 1.55) / 0.20 = - 2

p(Z < - 2) = 0.02275 ( Z probability calculator)

P(x < 1.95)

USing the relation to obtain the standardized score (Z) :

Z = (x - m) / s

Z = (1.95 - 1.55) / 0.20 = 2

p(Z < - 2) = 0.97725 ( Z probability calculator)

0.97725 - 0.02275 = 0.9545

c. between $1.35 and $1.75?

P(x < 1.35)

USing the relation to obtain the standardized score (Z) :

Z = (x - m) / s

Z = (1.35 - 1.55) / 0.20 = - 1

p(Z < - 2) = 0.15866 ( Z probability calculator)

P(x < 1.75)

USing the relation to obtain the standardized score (Z) :

Z = (x - m) / s

Z = (1.75 - 1.55) / 0.20 = 1

p(Z < - 2) = 0.84134 ( Z probability calculator)

0.84134 - 0.15866 = 0.68268

d. between $0.95 and $1.55?

P(x < 0.95)

USing the relation to obtain the standardized score (Z) :

Z = (x - m) / s

Z = (0.95 - 1.55) / 0.20 = - 3

p(Z < - 3) = 0.0013499 ( Z probability calculator)

P(x < 1.55)

USing the relation to obtain the standardized score (Z) :

Z = (x - m) / s

Z = (1.55 - 1.55) / 0.20 = 0

p(Z < 0) = 0.5 ( Z probability calculator)

0.5 - 0.0013499 = 0.4986501

3 0
3 years ago
Consider f(x) = 2x^2 + 1 and g(x) = 3x - 6. Which statement about f + g is true?
Vika [28.1K]

Answer:

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Step-by-step explanation:

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A tortoise is walking in the desert. It walks for 3.75 meters at a speed of 3 meters per minute. For how many minutes does it wa
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It would take the tortoise 1 minutes and 15 seconds
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Answer:

68

Step-by-step explanation:

1) 40+7=47

2) 47+7=54

3) 54+7=61

4) 61+7=68

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How harmful are the emissions from cosmetic hygiene and cleaning products?
Andreyy89

Answer:

Many of the chemicals in these products are known as Volatile Organic Compounds . These chemicals off-gas into the air that we breathe which exacerbates respiratory conditions and in some cases can be deadly.

Step-by-step explanation:

hope it helps u!

3 0
3 years ago
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