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prisoha [69]
2 years ago
10

URGENT !!!!!!!!! Please answer correctly !!!!! Will be marking Brianliest !!!!!!!!!!!!!!!!

Mathematics
2 answers:
Xelga [282]2 years ago
6 0

Answer:

sure .

Step-by-step explanation:

I answer and then give me brainliest. sorry I am being rude

:/

alekssr [168]2 years ago
4 0
Pts srry ........//.....
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Rewrite the expression 7 to the -2 power
iris [78.8K]

Answer:

1/49

Step-by-step explanation:

7^-2

1/49

7^2 is usually 49 for negative exponents just flip it

5 0
3 years ago
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Two thirds of the class finished the test on time. What fraction of the
Umnica [9.8K]

Answer:

1/3 of the class didn't finish their work

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3 years ago
HELP. How long is the minor axis for the ellipse shown below?
kifflom [539]

Given:

The equation of ellipse is

\dfrac{(x+4)^2}{25}+\dfrac{(y-1)^2}{16}=1

To find:

The length of the minor axis.

Solution:

The standard form of an ellipse is

\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2}=1      ...(i)

where, (h,k) is center, if a>b, then 2a is length of major axis and 2b is length of minor axis.

We have,

\dfrac{(x+4)^2}{25}+\dfrac{(y-1)^2}{16}=1      ...(ii)

On comparing (i) and (ii), we get

b^2=16

Taking square root on both sides.

b=\pm 4

Consider only positive value of b because length cannot be negative.

b=4

Now,

Length of minor axis = 2b

                                  = 2(4)

                                  = 8

So, the length of minor axis is 8 units.

Therefore, the correct option is B.

8 0
2 years ago
Working alone, Darryl can mop a warehouse in 11 hours. Elisa can mop the same warehouse in 9
Harrizon [31]

Answer:

  • ≈ 5 hours

Step-by-step explanation:

<u>Time needed if they work together:</u>

  • 1 / (1/11 + 1/9) =
  • 1/ (20 / 99) =
  • 99/20 ≈ 5 hours
3 0
2 years ago
What is the surface area of the cylinder? Express the answer in terms of pi
Sholpan [36]
Bonjour,

answer ≈ 522.92

working
A= 2πrh+2πr^2
=2 x π x 4 x 18+2 x π x 4^2
≈552.92031
4 0
3 years ago
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