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Serggg [28]
4 years ago
5

Can some one help with the following please…???

Mathematics
2 answers:
solniwko [45]4 years ago
8 0

Answer:

Step-by-step explanation:

a(a^2 + a -1) +7

a^3+a^2-a+7

f(-1)=(-1)^3+(-1)^2-(-1)+7

f(-1)=-1+1+1+7

f(-1)=0+1+7

f(-1)=8

2ab(a+b)-3ab(a-b)

<u>2a^2*b</u><em>+2ab^2</em><u>-3a^2*b</u><em>+3ab^2</em>

<em>−a^2*b+5ab^2</em>

<em />

when a=1 and b=2

−a^2*b+5ab^2

−(1)^2*2+5*1*2^2

-1*2+5*1*4

-2+5*4

-2+20

18

<em />

LenaWriter [7]4 years ago
5 0

Answer:

5. 8

6. 18

Step-by-step explanation:

5.

a(a^2 + a - 1) + 7 =

= a^3 + a^2 - a + 7

For a = -1,

= (-1)^3 + (-1)^2 - (-1) + 7

= -1 + 1 + 1 + 7

= 8

6.

2ab(a + b) - 3ab(a - b) =

= 2a^2b + 2ab^2 - 3a^2b + 3ab^2

= -a^2b + 5ab^2

For a = 1 and b = 2,

= -(1)^2(2) + 5(1)(2)^2

= -1(2) + 5(4)

= - 2 + 20

= 18

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A paint box contains 12 bottles of different colors. If we choose equal quantities of 3 different colors at random, how many col
Debora [2.8K]

Answer:

220 color combinations are possible.

Step-by-step explanation:

A combination is a way of selecting members from a grouping, such that the order of selection does not matter.

in our case we have 3-combinations of a set of 12 elements:

C(12, 3) = 12!/(3! (12-3)!)

C(12, 3) = 12!/(3! 9!)

C(12, 3) = (10*11*12)/(2*3)

C(12, 3) = 220 color combinations are possible.

3 0
3 years ago
Read 2 more answers
Trig Ratios see attachment
frutty [35]

Answer:

TanA = 5/12, SinA = 5/13

Step-by-step explanation:

Tangent is opposite/adjacent, so 5/12

Sin is opposite/hypotenuse, so 5/13

Hopefully this helps! Let me know if you have any questions

3 0
3 years ago
6^2/2(3)+4= what is the answer
Lelechka [254]
6^2/2(3)+4
Follow the order of operations, (GEMDAS) which goes like this:
<em>grouping, exponents, multiplication/divison, addition/subtraction
</em>
First up is our grouping, specifically parentheses. While we do have parentheses in our expression there isn't anything going on <em>inside</em> of them that we'd have to do first. (The 2(3) is another way of writing 2×3.)

Next we have exponents, which would be our 6^2. (6 squared)
When something is squared, that means it is multiplied by itself. 6^2 = 6×6 = 36.

Now our expression is 36/2(3)+4.

Next we need to handle the multiplication and division. (order doesn't matter)
The best way to do this is from left to right. The 36/2 = 18...
Then 18(3) = 54.
If we took 36(3) then divided by 2 we would get the same answer.
However, what you <em>cannot</em> do is multiply the 2(3), simply because the 2 is a denominator of a fraction. If you don't know what this is or why, it's okay--just always do it left to right and you'll never have to worry about it.

Now our expression is 54+4.

Finally, we can handle the addition/subtraction. 54+4 leaves us with 58.
7 0
3 years ago
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aleksandrvk [35]
The soda is price elastic because if you sell 10 dollars ecah you have an revenue of 20 dollars. And if you shorten the price to 1 dollar and you sell 30 of them you have a revenue of 30 dollars.
So the sodas are price elastic.
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3 years ago
Divide 3/25 and 9/25
a_sh-v [17]

Answer:

1/3

Step-by-step explanation:

4 0
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