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Yuri [45]
3 years ago
11

An = n2- 5

Mathematics
1 answer:
JulijaS [17]3 years ago
6 0

Answer:

D

Step-by-step explanation:

if to substitute values of n=1;2;3;4;5 into

a_n=n^2-5

then a₁=-4; a₂=-1; a₃=4; a₄=11; a₅=20.

It means the answer {-4, -1, 4, 11, 20,...} is correct.

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12(3+1) is what add the numbers inside and get the answer then multiply 12 with the answer
Lubov Fominskaja [6]
12(3+1)
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2 years ago
Read 2 more answers
1. Complete this statment: A polygon with all sides the same length is said to be____
Katen [24]

Answer:

Q1. Regular (A)

Q2. 105° (C)

Q3. x=45°

Step-by-step explanation:

Q1. A regular polygon is a polygon with all sides and angles equal.

Q2. The sum of the measure of exterior angles of a polygon is always 360°. Therefore,  360°-255°=105°

Q3. 148°+112°+(2x+10)°+(2x)°+90°= Sum of angles in a pentagon.

<u><em>Note</em></u>: The square at the fifth angle shows that its a right angle which is 90°. Also all the angles are equal to the sum of angles in a pentagon 'cause the polygon has 5 sides ( a pentagon).

Sum of interior angles of a polygon is: (n-2)180°. Where "n" is the number of sides of the polygon.

Therefore the sum of interior angles is (5-2)180°=540°

solving the equation you have;

360°+4x=540°

4x=540°-360°

4x=180°

x=180°/4

x=45°

therefore x=45°

8 0
3 years ago
Identify a pair of perpendicular lines in the given figure.
Ksju [112]

the answer is c

Step-by-step explanation:

because lines q and s are perpendicular to each other

4 0
2 years ago
2.) Solve 48 = -6<br>4.) Solve 4 + 3.5 = 12.5​
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These aren't solvable.
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