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4 years ago

What is this??? can anyone help?

Mathematics

1 answer:

zaharov [31]4 years ago

6 0

Answer:

Step-by-step explanation:

The formula of an area of a rectagle:

$A=wl$

w - width

l - length

The large rectangle:

w = 5, l = 5

$A_L=5\cdot5=25$

The small rectangle:

w = 1, l = 2

$A_S=1\cdot2=2$

Calculate what percentage of the area of a large rectangle is a small rectangle.

Method 1:

$\dfrac{2}{25}\cdot100\%=2\cdot4=8\%$

Method 2:

$\begin{matrix}25&-&100\%&\text{divide both sides by 25}\\\\1&-&4\%&\text{multiply both sides by 2}\\\\2&-&8\%\end{matrix}$

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3 years ago

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What is a factor of 98

ziro4ka [17]

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3 years ago

11/9 = 55/n <br><br> n=<br><br> HELP PLEASEEEEE

castortr0y [4]

Answer:

n = 45

Step-by-step explanation:

Step 1: Cross-multiply.

$\frac{11}{9} = \frac{55}{n}$
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3 years ago

Find average rate of change f(x)=-4x^(2)-3x-4 ; [-1,3]

NeTakaya

The rate of change of the given function at [-1,3] is 5

Further explanation:

Given function is:

$f(x) = 4x^2-3x-4$

And the interval is:

[-1,3]

In order to find the rate of chnage of function the given function's value is calculated at both points and divided by their difference

The formula is:

$Rate\ of\ change= \frac{f(x_2)-f(x_1)}{x_2-x_1}$

Here,

x_1 = -1

x_2 = 3

So,

$f(-1) = 4(-1)^2-3(-1)-4\\=4(1) +3-4\\=4-1\\=3\\f(3) = 4(3)^2-3(3)-4\\= 4(9)-9-4\\=36-13\\=23$

Putting the values in the rate of change formula:

$Rate\ of\ change= \frac{23-3}{3-(-1)}\\= \frac{23-3}{3+1}\\=\frac{20}{4} \\=5$

The rate of change of the given function at [-1,3] is 5

Keywords: Rate of change, functions

Learn more about functions:

#LearnwithBrainly

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3 years ago

A parking lot has the shape of a rectangle. The scale drawing below for the parking lot measures 6 cm by 20 cm. Give the length

Nonamiya [84]

Answer:

0.06 meter by 0.2 meter

Step-by-step explanation: 1 cm equals 0.01 m. So just divide it by 100

7 0

3 years ago

What is this??? can anyone help?​

What is this??? can anyone help?