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Anastasy [175]
3 years ago
13

I need help figuring this out can someone help me

Mathematics
2 answers:
Naddika [18.5K]3 years ago
5 0

Answer:

It has line symmetry and rotational symmetry with angles of rotation which are multiples of 45 degrees A and C

Step-by-step explanation:

Rotational symmetry with angles that are multiples of 360 / 8 = multiples of 45 degrees.

Reil [10]3 years ago
4 0
I think the answer is b
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Simplify.<br><br> 8 · 3 · x<br><br> 13x<br> 24x<br> 22x<br> 48x
Elina [12.6K]

8\cdot3\cdot x=(8\cdot3)x=24x

7 0
3 years ago
The calibration of a scale is to be checked by weighing a 13 kg test specimen 25 times. Suppose that the results of different we
Natali5045456 [20]

Solution :

a).

Given : Number of times, n = 25

            Sigma, σ = 0.200 kg

            Weight, μ = 13 kg

Therefore the hypothesis should be tested are :

$H_0 : \mu = 13 $

$H_a : \mu \neq 13$

b). When the value of $\overline x = 12.84$

 Test statics :

   $Z=\frac{(\overline x - \mu)}{\frac{\sigma}{\sqrt n}} $

  $Z=\frac{(14.82-13)}{\frac{0.2}{\sqrt {25}}} $

          $=\frac{1.82}{0.04}$

          = 45.5  

P-value = 2 x P(Z > 45.5)

            = 2 x 1 -P (Z < 45.5) = 0

Reject the null hypothesis if P value  < α = 0.01 level of significance.

So reject the null hypothesis.

Therefore, we conclude that the true mean measured weight differs from 13 kg.

3 0
3 years ago
Substitute 2m + n =0 and m + 2n =3
melamori03 [73]

There are several ways you can solve this problem if you're trying to solve for m and n. You can substitute, or systems of equations. However, I'm going to use substitution:

2m + n = 0 => n = -2m

We can input that in for the other equation:

m + 2n = 3 now becomes: m + 2(-2m) = 3

Now we can solve:

m + 2(−2m) = 3

m + −4m = 3

(m + −4m) = 3 (Combine Like Terms)

−3m=3

m = -1

Now we can input that value in to solve for n:

We said that n = -2m, and m = -1, so n = -2(-1):Answer:

n = 2

Your final answer is m = -1, and n = 2, which can also be written as (m,n) = (-1,2)

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

However, if you were solving for m+n:

You would add the two equations!:

2m + n = 0

m + 2n = 3

----------

3m + 3n = 3

Now, you can take 3 common:

3(m+n) = 3

m + n = 1

Your final answer for what m + n equals 1!

3 0
3 years ago
Which graph????????????
Marina86 [1]

Answer:

that one of course

Step-by-step explanation:

its THAT one

5 0
2 years ago
Solve Bx+q=A <br> solve for x
Pavel [41]
Download Photomath, it gives you the answer for this equations
8 0
3 years ago
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