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Dennis_Churaev [7]
3 years ago
8

Find the area. Will mark brainliest.

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
7 0

Answer:

40 sq cm

Step-by-step explanation:

This

area = length times width so 5 times 8 is 40

Rudik [331]3 years ago
7 0

Answer:

The area of the shape is C) 40cm^{2}

Step-by-step explanation:

The formula for the area of a rectangle is : length*width\\

To work out the area you would simply multiply the length of 8 by the width of 5, this gives you 40cm squared.

1) Multiply 8 by 5.

8*5=40cm^{2}

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2919.9455657092 centimeters^2

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To calculate the sale price of the coat, we can simply multiply 150 by .40, then subtract the product from 150.

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The quadratic regression equation for this data set is \rm y=-0.143x^2+0.59x+2.82\\.

<h3>What is the general form of a quadratic equation?</h3>

The general form of the quadratic equation is given by;

\rm ax^2+bx+c=0

Where; a, b, and c are the constants.

x;   0       1         2        3          4         5

y;  2.82  3. 29  3. 46  3. 33   2. 88  2. 24

From the table when the value of x = 0 the value of y is 2.82.

Then,

\rm y=ax^2+bx+c\\\\x=0\\\\2.82=a0^2+b(0)+c\\\\c=2.82

From the table when the value of x = 3 the value of y is 3.33.

\rm y=ax^2+bx+c\\\\x=3\\\\2.82=a(3)^2+b(3)+c\\\\9a+3b+2.82=2.82\\\\9a=-3b\\\\b=-3a\\\\

From the table when the value of x = 5 the value of y is 2.24.

\rm y=ax^2+bx+c\\\\x=3\\\\2.24=a(5)^2+(-3a)(5)+c\\\\25a-15a+2.82=2.24\\\\40a=2.24-2.82\\\\10a=-0.68\\\\a= \dfrac{-0.68}{10}\\\\a=-0.143

And the value of b is;

\rm b=3a\\\\b=3(-0.14)\\\\b=0.59

Therefore,

The quadratic regression equation for this data set is;

\rm y=ax^2+bx+c\\\\y=-0.143x^2+0.59x+2.82\\\\

Hence, the quadratic regression equation for this data set is \rm y=-0.143x^2+0.59x+2.82\\.

To know more about the Quadratic equation click the link given below.

brainly.com/question/14935613

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