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3 years ago

Find the area of a rectangle that has a length of 4.6 in. and a width of 3.4 in.

Mathematics

1 answer:

AlexFokin [52]3 years ago

6 0

Answer:

15.64 Step-by-step explanation: I used a calculator

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If one zero of the following polynomial 8x^2-13x-4k is the reciprocal of the other, then find k

Lana71 [14]

Answer:

Step-by-step explanation:

hello :

if x1 and x2 this zero for ax²+bx+c you have : x1 = 1 /x2 means :x1 × x2 =1

but : x1 × x2 = c /a

in this exercice : a =8 and b = -13 and c = - 4k

so : c/a =-4k/8

so : -4k/8 = 1

-4k = 8 k = 8/-4 k = -2

this polynomial is : 8x²-13x +8

6 0

3 years ago

What is an example of when you would want consistent data and, therefore, a small standard deviation?

steposvetlana [31]

Answer:

12.1, 12.3,12.4,12.5,12.3,12.1,12.2

$\bar X= \frac{12.1+12.3+12.4+12.5+12.3+12.1+12.2}{7}=12.271$

And for the standard deviation we can use the following formula:

$s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And after replace we got:

$s = 0.1496$

And as we can ee we got a small value for the deviation <1 on this case.

Step-by-step explanation:

For example if we have the following data:

12.1, 12.3,12.4,12.5,12.3,12.1,12.2

We see that the data are similar for all the observations so we would expect a small standard deviation

If we calculate the sample mean we can use the following formula:

$\bar X=\frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X= \frac{12.1+12.3+12.4+12.5+12.3+12.1+12.2}{7}=12.271$

And for the standard deviation we can use the following formula:

$s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And after replace we got:

$s = 0.1496$

And as we can ee we got a small value for the deviation <1 on this case.

8 0

3 years ago

Determine the domain and range for t (x) = -(x +10)2 - 64

kirza4 [7]

Your answer would be x= -42

3 0

3 years ago

PLEASEEE HELP Also please don’t send me a link for the answer

Solnce55 [7]

See the image for details

6 0

3 years ago

The pet shop is putting together goody bags to send to different

amid [387]

Answer

They will be able to make 18 goody bags with 24 extra toys.

Step-by-step explanation:

The least number is 18. So they will only be able to put 18 of each other toy to fill the bags with all 3 toys. So the extra toys with be the remainders.

3 0

3 years ago