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Vesna [10]
3 years ago
13

Identify the angles of rotational symmetry for the figure.

Mathematics
1 answer:
miss Akunina [59]3 years ago
3 0
I saw 180, 90, 45. That’s only because 360/8=45 so it’s symmetrical when rotated by a multiple of 45. Hope that helps
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A.
Reptile [31]

Answer:

The real zeros of f(x) are x = 0.3 and x = -3.3.

Step-by-step explanation:

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = a(x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}

x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}

\bigtriangleup = b^{2} - 4ac

In this problem, we have that:

f(x) = x^{2} + 3x - 1

So

a = 1, b = 3, c = -1

\bigtriangleup = 3^{2} - 4*1*(-1) = 13

x_{1} = \frac{-3 + \sqrt{13}}{2*1} = 0.3

x_{2} = \frac{-3 - \sqrt{13}}{2*1} = -3.3

The real zeros of f(x) are x = 0.3 and x = -3.3.

7 0
3 years ago
Each square on Olivia's chessboard is 11 square centimeters.A chessboard has 8 squares on each sid.To the nearest tenth,what is
stellarik [79]
First, find the length of one side of a square:
Area = side²
11 = s²
s = √(11) cm

Since there are 8 squares on each side, multiply the length of one square by 8 to get the length of 8 squares.
√(11) * 8 = 8√(11) ≈16.5 cm

Hope this helps!
5 0
3 years ago
Evaluate the expression when a=-15 and b=-5 .<br><br> b+14 <br> ----------<br> 3
brilliants [131]
The answer is 3 because since b=-5 you get -5 and add it to 14 giving you 9 and then you divide 9/3 which gives you 3. Hope this helps :)
8 0
3 years ago
Read 2 more answers
Solve this equation for x.<br> 2/3(X -7)= -2
White raven [17]

Answer:

x=4

Step-by-step explanation:

2/3(x-7)=-2

Multiply both sides by 3/2

x-7=-3

move constant to the right

x=-3+7

calculate

x=4

6 0
3 years ago
Read 2 more answers
Simplify the expression. 68 – 18 ÷ 3 • 6 Please help
MAXImum [283]
Remember PEMDAS (Parenthesis, Exponents, Multiplication, Divison, Addition and Subtraction)

Also note that Multiplication and Division needs to be done left to right and the same goes for Addition and Subtraction.

So in your problem, the first operation we need to do is division.

68 - (18/3) x 6
68 - 6 x 6

Now we do multiplication
68 - 6 x 6
68 - 36

Finally we do subtraction because that's the only operation we have left to do
68 - 36 = 32

So your answer should be 32.
5 0
3 years ago
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