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KATRIN_1 [288]
3 years ago
7

Select the correct answer.

Mathematics
1 answer:
11Alexandr11 [23.1K]3 years ago
6 0

not reall sure  that's a toughy maybe the 3rd one?

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What is (8a+2b-(2a-5b) ?
inysia [295]
8a+2b * -2a + 5b (since there's an invisible -1, at least the 1 is) so the product of that is -16a^2 + 10b^2
7 0
3 years ago
Determine whether the following problem involves a permutation or combination.​ (It is not necessary to solve the​ problem.) How
Aleksandr [31]

Answer:

Permutation

Step-by-step explanation:

Since we are talking about passwords the order of the letters matters, i.e, the pasword UpT is different to the pasword pUT. Therefore, the problem involves all the permutations of 33 letters, from the given letters, where no repetitions of letters are allowed.

4 0
3 years ago
A square garden has a 20 ft fence surrounding it. How much will it cost to mulch the garden if one bag covers 2.5 square feet an
finlep [7]

Answer:

$39.90

Step-by-step explanation:

Ok square, all sides equal.

20ft fence would be perimeter.

Covers is area.

20/4=5

5 is the length of each side.

A=5*5

A=25

one bag=2.5

25=2.5x

x=10

it takes 10 bags of mulch.

10*3.99

$39.90 to cover it all

5 0
4 years ago
Read 2 more answers
The ratio of roosters to chickens is 2 to 8. If there are 5 roosters, how many chickens are there?
Aloiza [94]
Roosters to chickens is 2 to 8

That means where there are 2 roosters, there are 8 chickens.

Simplify the ratio 2:8
The ratio can be simplified to 1:4

So, for 1 rooster, there are 4 chickens.

Now, the question says that if there are 5 roosters, how many chickens will there be?

1 rooster to 4 chickens
5 roosters to ? chickens

We went from 1 rooster to 5 rooster. We multiplied by 5.
To find out how many chickens there are for 5 roosters, multiply 4 chickens by 5.

4 * 5 = 20

Where there are 5 roosters, there will be 20 chickens.

Another way to solve is as follows:

\frac{2}{8} =\frac{5}{x}\\\\\sf{Cross~multiply}\\\\2x = 5\times 8\\\\2x = 40\\\\x = 20\\\\\boxed{\bf{x=20}}

Your final answer is 20 chickens.<span />
3 0
4 years ago
Read 2 more answers
Thrice a number subtracted from 10?​
Mkey [24]

Answer:

10-3x

Step-by-step explanation:

let the number=x

thrice the number becomes 3x

7 0
3 years ago
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