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4 years ago

Please help please please

Mathematics

1 answer:

olasank [31]4 years ago

6 0

Hola!

Q. A regular Hexagon has reflection symmetry : True!

Because,
A shape has reflection symmetry only when it has one or more lines of symmetry.

A line of symmetry is a line that passes through a figure such that it splits the figure into two congruent halves.

[ refer the attachment. ]

hope it helps!

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Please help me idk this

marusya05 [52]

Answer:

56.52

Step-by-step explanation:

you do 3.14 times 18

8 0

4 years ago

Which of the following graphs represents a proportional relationship?

Lina20 [59]

The graph of a proportional relationship is a straightline that passes through the origin (0,0).

The only graph with that feature is the option c., so that is the answer.

The other graphs ar linear relationships because the are straighlines that to not pass through the origin.

Answer: the option c.

8 0

3 years ago

Determine the length of the hypotenuse in a right triangle with legs 5 inches and 12 inches

Alborosie

In a right angled triangle we can use Pythagoras theorem to determine third side in case two sides are given.

The formula of Pythagoras theorem is given by:

$x^{2} +y^{2} =z^{2}$

Where x , y and z are sides of triangle , z is hypotenuse.

Now we use this formula to find hypotenuse.

Plugging other two sides which are 5 in. and 12 in.

$5^{2} +12^{2} =z^{2}$

$25 +144 =z^{2}$

$169 =z^{2}$

Taking square root on both sides

square root of 169 is 13

so we have z=13

Hypotenuse is 13 inches.

7 0

3 years ago

The weekly incomes of a large group of executives are normally distributed with a mean of $2,000 and a standard deviation of $10

cestrela7 [59]

Let X be the weekly incomes of a large group of executives. The weekly incomes of a large group of executives follows Normal distribution with mean $2000 and standard deviation $100.

μ =2000, σ =100

We have to find z score for income $2100 i.e x=2100

Z = $\frac{x-mean}{standard deviation}$

= $\frac{2100 - 2000}{100}$

Z = 100/100

Z = 1

The z score for income $2100 is 1

6 0

3 years ago

The first three terms of an arithmetic sequence are 2k+1, 5k, 7k+2. What is the value of k?

ki77a [65]

Answer:

Step-by-step explanation:

In an arithmetic sequence, we keep adding/subtracting to get the next term in the sequence.

Therefore, we can make an equation that looks like this:

5k-(2k+1) = 7k+2-5k

We can subtract 2k+1 from 5k, and 5k from 7k+2, because from subtracting the difference would be the same. (common difference of sequence is what we would find)

Now, we just need to simplify.

5k-2k-1 = 2k+2

3k-1=2k+2

Now let's combine like terms, and we get:

k=3

Hope this helped!

4 0

3 years ago