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Elden [556K]
3 years ago
7

you have 5 cards, each with a different vowel on it. you select one card, then another without replacement. find P(a, then e)

Mathematics
1 answer:
shepuryov [24]3 years ago
7 0

Answer:

p(a)=1/5

p(e)=1/4

Step-by-step explanation:

There are 5 vowels: a, e, i, o, u.

The probability of a is 1/5 or 20%.

Then without replacement there are 4 cards left.

The probability of e becomes 1/4 or 25%

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The histogram presents the compressive strengths of a sample of concrete blocks hardened for 28 days.
dusya [7]

Answer:

The question is not complete but I have uploaded the image to complete the question.

The missing rectangle has a relative frequency of 0.15, and this is the same as the height.

Step-by-step explanation:

Let us define what a frequency and relative frequency are

The frequency of a datum is the number of times a given item (datum) appears in the data set.

While the relative frequency is the fraction or proportion of times taken from the whole in which an item/datum occurs.

So, from the image I uploaded, the relative frequency column represents the height of the histogram. Let the height of the missing rectangle be <em>x.</em>

Therefore the heights of the rectangles written from left to right are 0.05, 0.1, 0.15, <em>x, </em>0.25, 0.2, and 0.1.

From the definition of relative frequency, the total sum of relative frequency is 1, if represented as decimals or fractions it can either be expressed in percentage, or decimal (fractions). In this question, it is represented in decimal, and the sum of all the relative frequency is 1.

0.05 + 0.1 + 0.15 + <em>x </em>+ 0.25 + 0.2 + 0.1 = 1 ;

0.85+ <em>x </em>=1

Therefore, <em>x </em>= 1 - 0.85= 0.15

3 0
3 years ago
A Spanish teacher informed her class that she would be giving 4 quizzes each month. Write an equation that shows the relationshi
Free_Kalibri [48]

Answer:

y = 4x

Step-by-step explanation:

Since there are going to be four quizzes a month (x), we know that we will multiply the number of months (x) by the number of quizzes (4). However, because we don't know how many months there are, we can define the months as (x), and instead put the total (y) is equal to the number of quizzes per month (4), multiplied by the number of months (x). Out final result is

(y = 4x)

6 0
3 years ago
132 boys to 89 girls what's the ratio
Dafna1 [17]
132:89 is the answer
6 0
3 years ago
Work out the answers of the following:
schepotkina [342]

Answer:

1)-5

2)-15

3)1

4)-11

5)-70

if negative use () for example

(-2)-7+4

7 0
3 years ago
Read 2 more answers
What is the value of x? enter your answer in the box. x =
leonid [27]

Answer:

Step-by-step explanation:

Sum of all angles of triangle = 180

39 + 102 + x = 180

         141 + x = 180

Subtract 141 from both sides

                 x = 180 - 141

                 x = 39

4 0
3 years ago
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