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sveta [45]
3 years ago
5

Evaluate the numerical expression. − 1 3 − (− 4 9 )

Mathematics
1 answer:
notka56 [123]3 years ago
6 0
Two negatives make a positive so, -13 - (-49) equals -13 + 49, or 49-13, they are all the same thing, all equal to 36. 
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After a 10% discount it became $450?
REY [17]
0.9x = 450
x = 450/0.9
x = 500

Answer = 500
7 0
3 years ago
Subtract. -21 - (-13)
Burka [1]

Answer:

-8

Step-by-step explanation:

-21-(-13)

=-21+13

=-8 is the answer......

3 0
2 years ago
Read 2 more answers
Solve the equation. <br><br> 11 = –d + 15<br><br> 11<br><br> 6<br><br> 4<br><br> –4
Annette [7]
The answer is 4 because the d is already negative
7 0
3 years ago
If every student in a large Statistics class selects peanut M&amp;M’s at random until they get a red candy, on average how many
kotykmax [81]

Question:

According to Masterfoods, the company that manufactures M&M's, 12% of peanut M&M's are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. You randomly select peanut M&M's from an extra-large bag looking for a red candy.

If every student in a large Statistics class selects peanut M&M’s at random until they get a red candy, on average how many M&M’s will the students need to select? (Round your answer to two decimal places.).

Answer:

If every student in the large Statistics class selects peanut M&M’s at random until they get a red candy the expected value of the number of  M&M’s the students need to select is 8.33 M&M's.

Step-by-step explanation:

To solve the question, we note that the statistical data presents a geometric mean. That is the probability of success is of the form.

The amount of repeated Bernoulli trials required before n eventual success outcome or

The probability of having a given number of failures before the first success is recorded.

In geometric distribution, the probability of having an eventual successful outcome depends on the the completion of a certain number of attempts with each having the same probability of success.

If the probability of each of the preceding trials is p and the kth trial is the  first successful trial, then the probability of having k is given by

Pr(X=k) = (1-p)^{k-1}p  

The number of expected independent trials to arrive at the first success for a variable Xis 1/p where p is the expected success of each trial hence p is the probability for the red and the expected value of the number of trials is 1/p or where p = 12 % which is 0.12

1/p = 1/0.12 or 25/3 or 8.33.

4 0
3 years ago
one year 76 people helped at the town cleanup the next year 302 people helped how many more people helped in the second year?
AlekseyPX
The answer is 226. because 302-76=226
4 0
3 years ago
Read 2 more answers
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