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natka813 [3]
3 years ago
5

I need the solution to this

Mathematics
1 answer:
Sergio039 [100]3 years ago
3 0

Answer:

x = 40°

Step-by-step explanation:

the sum of all exterior angles of any polygon is 360°

9x = 360

x = 40

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Write the 5th term in the expansion of (5x-y/2)^7
Nezavi [6.7K]

Answer:

65625/4(x^5)(y²)

Step-by-step explanation:

Using binomial expansion

Formula: (n k) (a^k)(b ^(n-k))

Where (n k) represents n combination of k (nCk)

From the question k = 5 (i.e. 5th term)

n = 7 (power of expression)

a = 5x

b = -y/2

....................

Solving nCk

n = 7

k = 5

nCk = 7C5

= 7!/(5!2!) ------ Expand Expression

=7 * 6 * 5! /(5! * 2*1)

= 7*6/2

= 21 ------

.........................

Solving (a^k) (b^(n-k))

a = 5x

b = -y/2

k = 5

n = 7

Substituting these values in the expression

(5x)^5 * (-y/2)^(7-5)

= (3125x^5) * (-y/2)²

= 3125x^5 * y²/4

= (3125x^5)(y²)/4

------------------------------------

Multiplying the two expression above

21 * (3125x^5)(y²)/4

= 65625/4(x^5)(y²)

5 0
3 years ago
What word matches this definition: used to locate a point on the coordinate plane
Cloud [144]

Answer:

Ordered Pair

Step-by-step explanation:

Pair of numbers used to locate a point on a coordinate plane; the first number tells how far to move horizontally and the second number tells you how far to move vertically.

8 0
4 years ago
After distributing the terms (3x - 7) (2x + 5), you get a new expression of the form
jeka57 [31]
First multiply (3x-7) and (2x+5)
i already did the multiplication so i am writing the answer
(3x-7)(2x+5)
6x^2+x-35

a is 6
b is 1
c is -35

if you want me to share how i did the multiplication then do let me know
6 0
2 years ago
Can someone help me plss! ?
Ann [662]
Sry but that’s too much which one would you like help on
5 0
3 years ago
Determine the value of x and y and the following diagram
Tatiana [17]

Answer:

Step-by-step explanation:

first subtract 125-180=X you will get   X=55 so then add  X+X+y=180 which x+x+y= is actually  55+55+y=180 but don't add the y just yet add 55+55 then you will get 110+y=180 so then flip it backwards and do y=180-110 and your anwser is  y=70

7 0
3 years ago
Read 2 more answers
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