All categories

4 years ago

The question is in the picture

Mathematics

1 answer:

MakcuM [25]4 years ago

4 0

Answer:

Step-by-step explanation:

If you divide 180 by 60 you can see that they send 3 texts a minute after you divide 45 by three and see that they have 15 minutes left the Number line diagram shows the amount of time and texts she can send.

You might be interested in

GEOMETRY HELP Which of the following are dependent events?

lisabon 2012 [21]

Answer:

Option C

Step-by-step explanation:

A and B are said to be independent of

P(A intersection B) = P(A)*P(B).

Or if drawing is done with replacement, etc.

A) P(drawing a king) = 4/52 = 1/13

IF we replace again drawing a kind is the same 1/13

Hence independent

B) Coin flipping each toss is obviously independent of the other as prob of getting tail in a fair coin is 1/2 irrespective of the previous outcomes

C) Without replacement is not independent

Since first prob = 4/52 and second would be 3/51 not the same as before

D) Rolling a die is independent as getting a 2 in any throw is always the same.

C is answer

4 0

3 years ago

I need help and please have the work with the ones that are harder

Elina [12.6K]

1. 6
2. -12
3. 0.75
4. 1.4
5.
6.
7.
8.
9. -0.7

6 0

3 years ago

How do I do this? Please help!

const2013 [10]

I already answered this question, if you look back in your questions you should find this answered along with another one. I'll do it again just in case you don't find it.

Answer:

{y,x} = {-4,-2}

Expanation:

Solve by Substitution :

// Solve equation [1] for the variable y

[1] y = 2x

// Plug this in for variable y in equation [2]

[2] -2•(2x) - 8x = 24

[2] - 12x = 24

// Solve equation [2] for the variable x

[2] 12x = - 24

[2] x = - 2

// By now we know this much :

y = 2x

x = -2

// Use the x value to solve for y

y = 2(-2) = -4

8 0

3 years ago

Suppose that daily calorie consumption for american men follows a normal distribution with a mean of 2760 calories and a standar

lianna [129]

Answer:

38.11% probability that the mean of her sample will be between 2700 and 2800 calories

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .