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olga55 [171]
3 years ago
12

Which pair of expressions is equivalent?

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
4 0
You’re answer is a
Please mark brainliest
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If you have work plz show it but I need help with this anyone?
inysia [295]

1) -31

2)-15

3)-13

4)-7

5) 32

6)-7

7)-23

8) 2

9) 9

10) 10


5 0
3 years ago
Which ordered pair is the vertex of y=|x+5|-1
nataly862011 [7]

We can tell that this absolute value function opens up, so the vertex will be at the x value where the output is the lowest. The lowest you can make |x+5| go is 0, because everything else will be a positive number is greater. The one x value that does that is -5. Plug in -5, and you will get |-5+5|-1=-1. So, the ordered pair for the vertex will be (-5,-1)

3 0
3 years ago
Acellus
nekit [7.7K]

Answer:

Step-by-step explanation:

3 0
3 years ago
The owner of a small deli is trying to decide whether to discontinue selling magazines. He suspects that only 10% of his custome
Rainbow [258]

Answer:

0.55% probability that exactly 5 out of the first 13 customers buy a magazine

Step-by-step explanation:

For each customer, there are only two possible outcomes. Either they buy a magazine, or they do not. The probability of a customer buying a magazine is independent of other customers. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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

And p is the probability of X happening.

10% of his customers buy a magazine

This means that P = 0.1

What is the probability that exactly 5 out of the first 13 customers buy a magazine?

This is P(X = 5) when n = 13. So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 5) = C_{13,5}.(0.1)^{5}.(0.9)^{8} = 0.0055

0.55% probability that exactly 5 out of the first 13 customers buy a magazine

3 0
3 years ago
Read 2 more answers
Match each scenario with the type of correlation it shows.
Arisa [49]

Answer:

The number of items bought and the checking account balance - negative correlation

The height of a baseball player and the number of hits made- no correlation

The time spent practicing and the number of free throws made- positive correlation

Step-by-step explanation:

8 0
3 years ago
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