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pychu [463]
3 years ago
7

1.Выполните действия:

Mathematics
1 answer:
Step2247 [10]3 years ago
6 0

Answer:

Step-by-step explanation:

a. a^4 - 2ab^2 - 2ab^2 + 4b^4 = a^4 - 4ab^2 + 4b^2

b. 49x^2 - 14x + 1

c. 25a^2 - 20ab^4 + 4b^8

d. x^2 - 144

e. -16n^6 - 28n^3 + 28n^3 + 49 = -16n^6 + 49

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I need help on number 9
umka21 [38]

Answer:


Step-by-step explanation:

You used Pythagorean theroem which is correct as this does form a right triangle however 50 is the hypotenuse as the ladder is propped up against the wall. 30 would then be the height of the triangle and the base is unknown so...

50^{2} = 30^{2} + x^{2}

50 squared minus thirty squared gives 1600 so:

1600 = x^{2}

Therefore x is the square root of 1600 which is 40

7 0
3 years ago
Read 2 more answers
You have 5 55 reindeer, Bloopin, Rudy, Ezekiel, Prancer, and Balthazar, and you want to have 3 33 fly your sleigh. You always ha
sweet-ann [11.9K]

Answer:

60 different ways.

Step-by-step explanation:

We have been given that you have 5 reindeer, Bloopin, Rudy, Ezekiel, Prancer, and Balthazar, and you want to have 3 fly your sleigh. You always have your reindeer fly in a single-file line. We are asked to find the number of ways in which we can arrange reindeer.

We will use permutations to solve our given problem.

The number of way to choose r objects from a set of n objects is ^nP_r=\frac{n!}{(n-r)!}.

Upon substituting our given values in permutations formula, we will get:

^5P_3=\frac{5!}{(5-3)!}

^5P_3=\frac{5!}{2!}

^5P_3=\frac{5\times 4\times 3\times 2!}{2!}

^5P_3=5\times 4\times 3

^5P_3=60

Therefore, you can arrange your reindeer in 60 different ways.

4 0
3 years ago
3/7 x+5=8 solve the equation
yKpoI14uk [10]

Answer :

x = 7

Solution :

3/7 x + 5 = 8

3/7 x = 8 - 5

3/7 x = 3 | * 7

3x = 21 | : 3

x = 7

3 0
4 years ago
Twice the sum of a number and ten
padilas [110]

Answer:

2(x+10)

Step-by-step explanation:

Well since sum is addition and the number and 10 are the sum, let’s make the “number“ (x) and add em up. 10+x.

Now we gotta double that sum which is basically

2(10+x)

6 0
3 years ago
Read 2 more answers
Simplify the following expression.
sdas [7]

Answer:

4^1/8

Step-by-step explanation:

One of the exponential properties

4 0
2 years ago
Read 2 more answers
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