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2 years ago

Someone help me with this fast please

Mathematics

2 answers:

rewona [7]2 years ago

3 0

Answer:

A. x^2 - 6x - 16

Step-by-step explanation:

FOIL it

x * x = x^2

2 * x = 2x

-8 * x = -8x

2 * -8 = -16

x^2 + 2x - 8x - 16. combine like terms

x^2 - 6x - 16

Tems11 [23]2 years ago

3 0

Answer:

Step-by-step explanation:

expand

x*x +2x-8x-16

x^2 -6x-16

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The area for this shape.

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Answer:

240 cm

Step-by-step explanation:

10 • 18 = 180

18 - 6 = 12

12 • 5 = 60/2 = 30

12 • 5 = 60/2 = 30

180 + 30 + 30 = 240

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3 years ago

Determine the area of this shape. Express your answer in terms of pi.

mrs_skeptik [129]

The area of the composite shape is $21\pi\text{ sq. units}$

The shape is made up of four semi-circular regions. (see image attached to the solution). The area can be computed as follows:

$Area=(A-C)+(B-D)$

where each letter represents the areas of the associated semi-circles.

The area of a semi-circle is given by

$Area_s=\dfrac{\pi r^2}{2}$

For region $A$ , $r=6units$

$A=\dfrac{\pi\times6^2}{2}\\\\=18\pi \text{ sq.units}$

For region $B$ , $r=4units$

$B=\dfrac{\pi\times4^2}{2}\\\\=8\pi \text{ sq.units}$

For region $C$ , $r=3units$

$C=\dfrac{\pi\times3^2}{2}\\\\=4.5\pi \text{ sq.units}$

For region $D$ , $r=1units$

$D=\dfrac{\pi\times1^2}{2}\\\\=0.5\pi \text{ sq.units}$

So, the area of the shape is

$Area=(A-C)+(B-D)\\\\=[(18-4.5)+(8-0.5)]\pi\\\\=21\pi\text{ sq.units}$

Learn more about how to compute the area of composite shapes: brainly.com/question/316492

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2 years ago