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olga55 [171]
3 years ago
10

A jar contains five blue marbles and three red marbles. Suppose you choose a marble at​ random, and do not replace it. Then you

choose a second marble. Find the probability of the following event. Both of the selected marbles are red.
Mathematics
1 answer:
VladimirAG [237]3 years ago
6 0
For the first event
P=3/(5+3)=3/8=0.375


Total became 2 red and 5 blue .... 7 total

For the second event
P=2/(5+2)=2/7= 0.2857
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give the most general solutions to equations. . 2sinxcosx-sin(2x)cos(2x)=0. . A. simplify the first expression using double angl
Zinaida [17]
2sinxcosx - sin(2x)cos(2x) = 0 

<span>Part I </span>
<span>The double angle identity for sine states that sin(2x) = 2sinxcosx </span>
<span>Thus we get: </span>
<span>sin(2x) - sin(2x)cos(2x) = 0 </span>

<span>Part II </span>
<span>sin(2x)(1 - cos(2x)) = 0 </span>

<span>Part III </span>
<span>Either sin(2x) = 0 or </span>
<span>1 - cos(2x) = 0 </span>
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<span>For sin(2x) = 0, this is true for </span>
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<span>For cos(2x) = 1, this is true for </span>
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I hope my answer has come to your help. Thank you for posting your question here in Brainly.
5 0
3 years ago
What does 1/8 + 1/6 equal?​
dedylja [7]

Answer:

7/24

Step-by-step explanation:

1/8 + 1/6

First get a common denominator of 24

1/8 * 3/3 = 3/24

1/6 * 4/4 = 4/24

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8 0
3 years ago
Please help!
mariarad [96]

Answer: 1,045 passengers

Step-by-step explanation:

This question involves multiple steps. Let's first try to figure the number of children on the cruise.

The ratio of girls to the total number of children was 2:5. There are 198 boys.

This information tells me that for every 5 children, there's 2 girls and 3 boys.

Based off of this information, we can divide the total number of boys by 3 in order to find the number of children.

198÷3=66

Let's multiply 66 by 5 since that's the number of groupings based off the ratio.

66×5=330

Let's check the number of children. Since the ratio of girls to total children is 2:5 and we already confirmed there's 198 boys, there should be 132 girls. We can turn this ratio into a fraction where 2/5 of the children are girls. we can confirm this by multiply 330 by 2/5 (0.4) and getting 132.

There are 330 children on the cruise.

The ratio of the number of adults to the number of children was 13:6.

For every 6 children, there were 13 adults. Let's divide the number of children by 6 in order to find the number of groupings.

330÷6=55

Let's now multiply the groupings by 13 to find the number of adults.

55×13=715

So there should be 715 adults and 330 children on the cruise.

715+330=1,045

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3 years ago
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Anton [14]

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EleoNora [17]

Answer:

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Step-by-step explanation:

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