$r^2-6r-9s^2+9=r^2-6r+9-9s^2=r^2-2\cdot r\cdot3+3^2-9s^2\\\\\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\=(r-3)^2-9s^2=(r-3)^2-(3s)^2\\\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\=(r-3-3s)(r-3+3s)\to A$

6 0

3 years ago

Someonee helppp pleaseee

lyudmila [28]

7,874 inches is the answer
Hope this helps!!!

5 0

3 years ago

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How many thirtieths in 400 sq ft

ozzi

Thirties in 400
ok well we could find out by dividing 400 by 30.
400 / 30 = 13.333333
We Can Round That To 13
Theres Your Answer (13)

7 0

4 years ago

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Answer fast What is 9.8 as a mixed number ?

VLD [36.1K]

Answer:

9 4/5

Step-by-step explanation:

Hopefully this helps you :)

pls mark brainlest ;)

8 0

4 years ago

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