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3 years ago

PLEASE HELP ME!!!!!

Mathematics

2 answers:

NARA [144]3 years ago

3 0

Answer:

c -13

Step-by-step explanation:

Maksim231197 [3]3 years ago

3 0

Answer:

Step-by-step explanation:

the answer is c. -13

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Find the area of a rectangle with a length of x + 2 and a width of 3x.

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A = l x w
A = (x+2) ( 3x)
A = 3x^2 + 6x

answer
Area of a rectangle = 3x^2 + 6x

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3 years ago

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Divide £208 in the ratio 3:1<br><br> How do I do this??

inysia [295]

Answer:

s = r1 s = 3.1 s = 3.1

v =a/s

v = 208/3.1

v = 67.0968

Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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3 years ago

you forget the last two digits of your password for a website. A what is the probability that you randomly choose the correct di

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3 years ago

A set of electric toothbrush prices are normally distributed with a mean of 87 dollars and a standard deviation of

Studentka2010 [4]

Answer:

The proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars is 0.0099

Step-by-step explanation:

A set of electric toothbrush prices are normally distributed with a mean of 87 dollars and a standard deviation of 8 dollars.

$Mean = \mu = 87$

Standard deviation = $\sigma = 8$

We are supposed to find proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars i.e.P(104.60<x<108.20)

$Z=\frac{x-\mu}{\sigma}$

At x = 104.60

$Z=\frac{104.60-87}{8}$

Z= 2.2

At x=108.20

$Z=\frac{108.20-87}{8}$

Z= 2.65

Refer the z table for p value :

P(x<108.20)-P(x<104.60)=P(Z<2.65)-P(Z<2.2)=0.9960-0.9861=0.0099

Hence The proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars is 0.0099

4 0

3 years ago