What is the work to find out the awnser to find out how many centimeters in a foot

1 answer:

4 0

To find how many cm are in a ft, you have to use the method of unit rate:

so we know that 12 in. equals a ft. so,

1 ft
------
12 in.

and 2.25 cm equals an in. so,

1 in.
-------
2.54cm

then we put the rates together and get:

1ft 1 in.
---- X -------................we cancel out the in. units and get:
12 in. 2.54 cm

Solve and get 1 ft = 30.48 cm

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Find the slope of the graph of the linear equation. y = -x - 2

Anastasy [175]

Answer:

slope is -1

Step-by-step explanation:

y=mx+b

(m=slope)

(b= y-intercept)

y-intercept= -2

slope and x is -x.

there is always a 1 in front of the x.

so...

-1x = mx take out x.

m= -1 or slope = -1

4 0

4 years ago

As shown at the right, rectangle abcd has vertices c and d on the. V-axis and vertices a and b on the part of the parabola y — 9

Sergio039 [100]

a) The perimeter function of the rectangle is $p = 18\cdot x -2\cdot x^{3}$ .

b) The domain of the perimeter function is $x \in [-3, 3]$ .

<h3>How to analysis the perimeter formula of a rectangle inside a parabola</h3>

a) The perimeter of a rectangle ( $p$ ) is the sum of the lengths of its four sides:

$p = AB\cdot AC$ (1)

If we know that $AB = 2\cdot x$ and $AC = 9-x^{2}$ , then the perimeter of the rectangle is represented by the following formula:

$p = 2\cdot x \cdot (9-x^{2})$

$p = 18\cdot x -2\cdot x^{3}$

The perimeter function of the rectangle is $p = 18\cdot x -2\cdot x^{3}$ . $\blacksquare$

b) The domain of the function is the set of values of $x$ associated to the function. After a quick inspection, we find that the domain of the perimeter function is $x \in [-3, 3]$ . $\blacksquare$

<h3>Remark</h3>

The statement is incomplete and poorly formatted. The correct form is described below:

As shown at the right, rectangle ABCD has vertices C and D on the x-axis and vertices A and B on the part of the parabola $y = 9-x^{2}$ that is above the x-axis. a) Express the perimeter $p$ of the rectangle as a function of the x-coordinate of A. b) What is the domain of the perimeter function?