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serg [7]
3 years ago
12

Simplify the expression below: * x2 – 25/x2 +6x+5

Mathematics
1 answer:
Artyom0805 [142]3 years ago
4 0

Answer:

Step-by-step explanation:

We can simplify the top as (x-5)(x+5) this divided by (x+5)(x+1) the x+5 cancel out and we get x-5 divided by x+1

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the ratio of the price of a pencil to that of a book is 3 :4. if the price of a pencil is Rs. 15, find the price of a book? ​
tester [92]
The answer is 20 because if you divide 15:20 by 5, you get 3:4. hope this helps!
3 0
3 years ago
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Bert and Ernie are missing each other and their friend Big Bird. They want to meet at Big Birds nest which is halfway from their
OLga [1]

Answer:

  21 miles

Step-by-step explanation:

Each of the distances is the same, so we have ...

  5x +4 = 15x -30

  34 = 10x

  3.4 = x

Then the distances are ...

  5(3.4) +4 = 21 . . . . miles

Bert and Ernie each live 21 miles from Big Bird's nest.

7 0
3 years ago
Will mark brainliest :) Given vectors u = -9i + 8j and v = 7i + 5j find 2u -6j in terms of unit vectors i and j
a_sh-v [17]

Answer:

b.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
1.) What is the mode of the data ? Show work ( A.3, B.5, C.8, D.10 )
ArbitrLikvidat [17]
Hey there.

1.) The mode is the number that's most frequent in a given list.
In our list, we have 2, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 9, 10.
Our most frequent number is 6; therefore, our mode is 6.

2.) The median is the number in the middle of a list organized from least to greatest.
2, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 9, 10;
4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 9;
4, 5, 5, 5, 6, 6, 6, 6, 7;
5, 5, 5, 6, 6, 6, 6;
5, 5, 6, 6, 6;
5, 6, 6;
6.
6 is our median.

I hope this helps, despite your answer choices not providing the correct answer.
6 0
3 years ago
A lock has two buttons: a "0" button and a "1" button.To open a door you need to push the buttons according to a preset 8-bit se
ratelena [41]

Answer:

Step-by-step explanation:

The problem relates to filling 8 vacant positions by either 0 or 1

each position can be filled by 2 ways so no of permutation

= 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2

= 256

b )

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= 1 / 256

c ) If first fails , there are remaining 255 permutations , so

probability of opening the lock in second arbitrary attempt

= 1 / 255 .

7 0
3 years ago
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