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3 years ago

Need help with geometry homework

Mathematics

1 answer:

KIM [24]3 years ago

8 0

A regular n-gon has n lines of symmetry

The angle of rotational symmetry for regular n-gon is 360 / n degrees.

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Classify the polynomial by its degree and by the number of terms. 17n^5-n^4

Sladkaya [172]

5th degree binomial is the answer.

7 0

3 years ago

Read 2 more answers

I need to find the slope

QveST [7]

Answer:

m = -3

Step-by-step explanation:

We can find the slope by using

m = (y2-y1)/(x2-x1)

We use two points

(0,-4) and (-2,2)

m = (2 - -4)/(-2 -0)

= (2+4)/(-2-0)

=6/-2

= -3

5 0

3 years ago

Read 2 more answers

Find the coordinates of the midpoint M and the distance between J(4,3) and K(2,-3)

Sergio [31]

Answer:

(3,0)

Step-by-step explanation:

Co-ordinates of J =(4,3)

Co-ordinates of K = (2,-3)

Midpoint formula :

= $\frac{x_{1}+x_{2} }{2} , \frac{y_{1} +y_{2} }{2} \\ \frac{4+2}{2} ,\frac{3+(-3)}{2}\\\frac{6}{2},\frac{3-3}{2}\\3, 0$

Coordinates of the midpoint M (3,0)

5 0

4 years ago

What number should be placed in the box to help complete the division calculation? Long division setup showing an incomplete cal

lianna [129]

Answer:

The unknown value is being subtracted from 226 is 160

Step-by-step explanation:

Long division setup showing an incomplete calculation

16 is in the divisor

3426 is in the dividend

2 hundreds and 1 tens is written in the quotient

3200 is subtracted from 3426 to give 226

An unknown value represented by a box is being subtracted from 226

so,

The dividend = 3426

The divisor = 16

2 hundreds means 200 and 1 tens means 10

∵ The quotient = 200 + 10 + x

∵ Dividend = divisor × quotient

∴ (16 × 200) + (16 × 10) + (16 × x) +remainder = 3426

∵ 16 × 200 = 3200

Subtract 3200 from the dividend

∴ 3426 - 3200 = 226

∵ 16 × 10 = 160

∴ 226- 160 = 66

⇒160is the unknown value

∵ 16 × x = 16x

∵ 66 - 16x = 0

∴ 66 = 16x

- Divide both sides by 16

∴ x = 4 and remainder = 2

∴ 3426 ÷ 16 = 200 + 10 + 4

∴ 3426 ÷ 16 = 214

∴ From the steps above the missing number subtracted from

226 is 160

The unknown value is being subtracted from 226 is 160

3 0

3 years ago

A sequence of Bernoulli trials consists of choosing components at random from a batch of components. A selected component is eit

Drupady [299]

Answer:

a) 0.0287 = 2.87% probability that three non-defective components in a batch of seven components.

b) 0.0336 = 3.36% probability that 8 non-defective components are drawn before the first defective component is chosen.

Step-by-step explanation:

A sequence of Bernoulli trials composes the binomial distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

The probability that a selected component is non-defective is 0.8

This means that $p = 0.8$

a) Three non-defective components in a batch of seven components.

This is P(X = 3) when n = 7. So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 3) = C_{7,3}.(0.8)^{3}.(0.2)^{4} = 0.0287$

0.0287 = 2.87% probability that three non-defective components in a batch of seven components.

b) 8 non-defective components are drawn before the first defective component is chosen.

Now the order is important, so the we just multiply the probabilities.

8 non-defective, each with probability 0.8, and then a defective, with probability 0.2. So

$p = (0.8)^8*0.2 = 0.0336$

0.0336 = 3.36% probability that 8 non-defective components are drawn before the first defective component is chosen.

4 0

3 years ago