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FromTheMoon [43]
3 years ago
9

How is this correct?

Mathematics
1 answer:
ale4655 [162]3 years ago
5 0
The answer is B. [x] 2x^2 (21 _ 2pi)
proof
2x^2 (21 _ 2pi)= 42x^2   -   4pix^2=  <span>rectangular area- circular area</span>
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Someone please help me ASAP because I am really stuck thank uuuuu!!!!!
Morgarella [4.7K]
81/200 is the answer
7 0
2 years ago
Read 2 more answers
Expand.<br> If necessary, combine like terms.<br> (3 + 4x) (3 - 4x)
shepuryov [24]
  • (3 + 4x) (3 - 4x)

We know the algebraic identity: (a - b)(a + b) = a^2 + b^2. Therefore, we should square 3 and 4x.

  • = (3)^2 - (4x)^2
  • 9 - 16x^2

<u>Answer</u><u>:</u>

<u>9</u><u> </u><u>-</u><u> </u><u>1</u><u>6</u><u>x</u><u>^</u><u>2</u>

Hope you could understand.

If you have any query, feel free to ask

5 0
2 years ago
2mn + 4n 2 and 5m 2 - 7mn
Katyanochek1 [597]
Answer: 5mn + 5m + 4n + 4

because

2mn - 7mn = 5mn

5m = 5m
stays the same

4n = 4n
stays the same

2 + 2 = 4

if you put them toghether than you get:

5mn + 5m + 4n + 4

is equal to

2mn + 4n + 2 and 5m + 2 -7mn
4 0
3 years ago
Pls help I will mark brainlyesd
aev [14]
First, we have to solve for x by isolating it on one side.
6x + 10 = -8
(Subtract 10 from both sides)
6x = -18
(Divide both sides by 6)
x = -3

On option C, x is on -3, so that would be the correct answer
7 0
2 years ago
Determine if each pair or ratios and rates are equivalent $3 for 6 bagels and $9 for 24 bagels
Andrej [43]
3:6 3,6,9 6,12,18,24
9:24. ~~ ~~
Yes it is equivalent because if you divide 9:24 with 3 it will equal 3:6 and if you keep adding with 3:6 buy it's self it will eventually aqualung 9:24
6 0
3 years ago
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