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miss Akunina [59]
2 years ago
11

A bag contains 5 black marbles, 7 blue marbles, 3 green marbles, 4 red marbles, and 1 white marble. A marble is selected and the

n replaced and a second marble is chosen. What is the probability of selecting a black marble and then a red marble?
Mathematics
1 answer:
schepotkina [342]2 years ago
5 0

Answer:

2/25

Step-by-step explanation:

It will be 20/400 + 12/400

=2/25

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CAN SOMEONE PLEASE EXPLAIN WHY THE ANSWER FOR THIS IS 4N+15. THIS IS 10 MINUTES PAST DUE!!! TAKE 20 POINTS​
Oduvanchick [21]
The first part of the expression 4n is because n is the amount of almond trees and to find the walnut trees, you need to multiply the number of almond trees (n) by for (4n). you would also add 15 because it says he has 15 more than 4 times as many walnut trees.

so here's the breakdown of the sentence:

Daquan has 15 more than (15 +) 4 times as many (4n) walnut trees in his orchard as he has almond trees.

hopefully this makes sense! have a nice day
6 0
2 years ago
A car manufacturer crash tests a certain model of car and measures the impact force. The test and model in question produce impa
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Answer:

30

Step-by-step explanation:

Given :

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Since the impact force in the test model is normally distributed, the shape of the sampling distribution will also be approximately normal with a mean equal to the mean of the test model.

Hence, the sample mean impact force will be equal to the population mean.

Therefore, sample mean = 30 ; population mean = 30

8 0
3 years ago
Read 2 more answers
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densk [106]

a. The population for the study is a total of 1000 adults, so the 50% that favored the plan made up a total of 500 people, since 500 is 1/2 (or 50%) of 1000.

b. The percentage provided is an inferential statistic. Inferential statistics are made by taking a sample of a population and using that sample as data used to make inferences/predictions. Since the percentage provided is a sample of a population being used to make a prediction, it is an inferential statistic.

8 0
3 years ago
Help I’m so dumb ://
il63 [147K]

Answer:

The corresponding angles are congruent and the corresponding sides are congruent.

Step-by-step explanation:

8 0
3 years ago
Answers? Thanks so much in advance for any help :)
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13. AC=6 

sorry it's just a guess i'm like 99% sure tho
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