# 18x2 - 54x – 20Expand and simplify

## Answers

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[tex]18x2 - 54x – 20 Expand and simplify[/tex]

36x- 54x-20

-18x-20

-38

answer

[tex]25\pi {ft}^{2}[/tex]

explanation

the area of a circle is calculated using the formula

[tex]area =\pi {r}^{2}[/tex]

or

[tex]area = \frac{\pi \: {d}^{2} }{4}[/tex]

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

[tex]d = 10ft[/tex]

we substitute the diameter into the formula to get:

[tex]area = \frac{\pi \: \times {10}^{2} }{4}[/tex]

[tex]area = \frac{100\pi}{4}[/tex]

[tex]area = 25\pi {ft}^{2}[/tex]

this is the exact value for the area of the circle.

the correct answer is a

[tex]1. 25pi ft^2 2. 5pi ft^2 3. 10pi ft^2 3. 20pi ft^2[/tex]10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.