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3 years ago

Help me solve this. Thank youx

Mathematics

1 answer:

SCORPION-xisa [38]3 years ago

8 0

Answer:

Its the first choice:

8πx + 24π.

Step-by-step explanation:

Area of shaded part = area of the large circle - area of the small circle

= π(x+5)^2 - π(x+1)^2

= (x^2 + 10x + 25 - (x^2 + 2x + 1)) π

= (8x + 24) π.

= 8πx + 24π.

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2(10r-7)-2(1+10r)=-r+2r

DerKrebs [107]

Answer:

r = -16

Step-by-step explanation:

We will use "distributive" property and "adding like terms" concepts in solving for the unknown variable "r".

The distributive property is:

a(b+c) = ab + ac

2(10r-7) = 20r - 14

also

-2(1+10r) = -2 - 20r

So, our equation becomes:

$2(10r-7)-2(1+10r)=-r+2r\\20r-14-2-20r=-r+2r$

Now we add like terms and move variables (r) to one side and numbers to another. Like terms mean:

3r + 5r = (3+5)r = 8r

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$20r-14-2-20r=-r+2r\\-16=r\\r=-16$

So,

the value of r is -16

6 0

3 years ago

Need help please 10 points

Maslowich

πr² = π.5.5 = π25 units² or 78.5 units²

hope it helps...!!!

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2 years ago