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3 years ago

Please help it for my math test tomorrow helpppp

Mathematics

1 answer:

loris [4]3 years ago

7 0

15: M= 2
B= -5
Slope intercept form= y=2x-5

16: y=5/8x + 1/2

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20pts. Find the measure of ∠BEC. A) 10° B) 60° C) 80° D) 100°

Schach [20]

<h2>Explanation:</h2><h2></h2>

The figure to this problem is attached below. We know that angles ∠AEG and ∠GEC are supplementary, so:

∠AEG + ∠GEC = 180°

∠AEG = 8x°

∠GEC = (4x + 60)°

8x° + (4x + 60)° = 180°

(12x + 60)° = 180°

12x + 60 = 180

12x = 180 - 60

12x = 120

x = 10

∠AEG and ∠BEC are vertical angles, so they are congruent:

∠BEC = 8x°

∠BEC = 8(10)°

∠BEC = 80°

8 0

3 years ago

Help please with question 11 if you have time

Flauer [41]

16y^3 + 9x^2y - 54x = 0

16*3y* dy/dx + 9x^2* dy/dx + 18xy - 54 = 0

dy/dx = = (54 - 18xy) / (48y + 9x^2)

I have to go I can do the second part later

7 0

4 years ago

David Barnes and his fiancée Valerie Shah are visiting Hawaii. At the Hawaiian Cultural Center in Honolulu, they are told that

balandron [24]

Using the hypergeometric distribution, it is found that there is a 0.0065 = 0.65% probability that both David and Valerie get picked for the Tahitian dance lesson.

The people are chosen without replacement from the sample, hence the <em>hypergeometric distribution </em>is used to solve this question.

<h3>What is the hypergeometric distribution formula?</h3>

The formula is:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

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

The parameters are:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

In this problem:

There is a total of 18 people, hence $N = 18$ .

2 people will be chosen, hence $n = 2$ .

David and Valerie corresponds to 2 people, hence $k = 2$ .

The probability that both get picked is P(X = 2), hence:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$P(X = 2) = h(2,18,2,2) = \frac{C_{2,2}C_{16,0}}{C_{18,2}} = 0.0065$

0.0065 = 0.65% probability that both David and Valerie get picked for the Tahitian dance lesson.

You can learn more about the hypergeometric distribution at brainly.com/question/25783392

7 0

3 years ago

If there are 9 girls and 11 boys in a class, what percentage of the class are girls

viva [34]

1. Find the total number of class members
9 + 11 = 20

2. Find 9 as a percentage of 20
9 / 20 = 0.45
0.45 x 100 = 45%

<u>45% of the class are girls.</u>

6 0

3 years ago

Ian spends a winter day recording the temperature once every three hours for science class. At 9am, the temperature was -13.2°F.

Step2247 [10]

Answer:

poop

Step-by-step explanation:

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6 0

3 years ago