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strojnjashka [21]

3 years ago

8

Are angles made of any two Rays eplain

1 answer:

gtnhenbr [62]3 years ago

5 0

No. Two rays can be parallel and so would never form an angle. Also, an angle (a single one as opposed to a quartet of angles) is formed by two coterminus line segments. That is to say, the line segments stop where they meet. A ray goes on forever in both directions.

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Solve the following system of equations by using the inverse of a matrix.

Zepler [3.9K]

Answer:

(x, y, z) = (-8,4,-2)

Step-by-step explanation:

.......................................

6 0

3 years ago

A mans weekly wage was £336 but now he earns £420. what is the percentage change

Arisa [49]

The percentage change from 339 to 420 is 21.34387%

6 0

3 years ago

Researchers are studying two populations of sea turtles. In population D, 30 percent of the turtles have a shell length greater

jeka57 [31]

Answer:

a. 0.1917

b. 0.0914

d. 0.1580

Step-by-step explanation:

(a)

$P^D = \frac{15}{40} = 0.375$

$P^E = \frac{11}{60} =0.8133$

Mean, $\sigma_{P^D-P^E} = P^D-P^E$ = 0.375 -0.1833 = 0.1917

(b) sample prop ? Show your work and label each value.

Mean, = = 0.1917

Standard deviation = $\sqrt{\frac{P^D(1-P^D)}{N_D} +\frac{P^E(1-P^E)}{N_E} }$

Standard deviation = $\sqrt{\frac{0.375(1-0.375)}{40} +\frac{0.1833(1 - 0.1833)}{60} }$

Standard deviation = 0.0914

(c)

Normality condition:

np ≥ 10 and n(1-p) ≥ 10

Both the samples satisfy the normality condition.

(d)

The probability is obtained by calculating the z score,

$z = \frac{(P^D-P^E)-(P^d-P^e)}{\sigma_{P^D - P^E}}$

$z = \frac{0.1917-0.1}{0.0914}$ = 1.0029

P(z > 1.0029) = 1 - P(z ≤ 1.0029)

The probability is obtained from the z distribution table,

P(Z > 1.0029) = 1 - 0.8420 = 0.1580

3 0

3 years ago

Pls help with this math question

Korvikt [17]

Answer:

I would say A

Step-by-step explanation:

if wrong sorry the graph kinda blurry

3 0

2 years ago

Read 2 more answers

What is the solution of x2+49 = x+5?

nikklg [1K]

Answer:

x = 12/5

Step-by-step explanation:

take the square of both sides

(x^2+49) = (x+5)^2

x^2 + 49 = (x+5) (x+5)

x^2+49= x^2 + 10x + 25

10x + 25 = 49

10x = 24

x = 12/5

4 0

3 years ago