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4 years ago

I NEED HELP. QUICK! ASAP! 30 PTS HEEELP!

Mathematics

2 answers:

Alex_Xolod [135]4 years ago

7 0

Answer:

the answer is b but there are no answer choices

Step-by-step explanation:

if i helped lpz mark ma the brainliest

MatroZZZ [7]4 years ago

4 0

Answer:

b) A. 12x≤120

Step-by-step explanation:

Since you have $120 and cost of each CD is $12,

Therefore you can purchase maximum 10 CDs or less than it.

Hence, this inequality will be given as: 12x≤120

Thus, option B is the correct answer.

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The sum of two numbers is 48. If one third of one number is 5 greater than one sixth of another number, which of the following i

Nostrana [21]

The answer is 22. try to figure it out:)

6 0

3 years ago

In a sample of 1000 cases, the mean of a certain test is 14 and the standard deviation is 2.5. Assume the distribution to be nor

Maslowich

Answer:

The top 20% of the students will score at least 2.1 points above the mean.

Step-by-step explanation:

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.

The mean of a certain test is 14 and the standard deviation is 2.5.

This means that $\mu = 14, \sigma = 2.5$

The top 20% of the students will score how many points above the mean

Their score is the 100 - 20 = 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.84.

Their score is:

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

$0.84 = \frac{X - 14}{2.5}$

$X - 14 = 0.84*2.5$

$X = 16.1$

16.1 - 14 = 2.1

The top 20% of the students will score at least 2.1 points above the mean.

7 0

3 years ago

Which will hold more juice, 12cans which is 150 ml or 2 bottles which is 1 liter

inn [45]

Answer:

if the two bottles are 1 liter each then those two bottles would hold more juice because in total they would hold two liters of juice

Step-by-step explanation:

the 12 cans of 150 ml would hold a total of 1.8 liters which is less than 2 liters

3 0

4 years ago

What is 3/49 simplified?

lys-0071 [83]

It is already in its lowest form :P Unless you wan the decimal which is 0.061224489 ish

3 0

3 years ago

Read 2 more answers

PLEASE HELP FAST I NEED A EXPERT OR HIGHER 20 POINTS! I need the domain and range of each Graph 2 number so for example 5/1 or s

Andrews [41]

Problem 1

Answers:

Domain: $-3 \le x < 5$

Range: $-4 < y \le 3$

--------------------

Explanation:

The domain is the set of allowed x inputs of a function. The smallest x value we can use is x = -3 (note the very left-most point of the graph). The right-most point involves x = 5, but we can't actually use this x value due to the open hole. So that's why we don't have "or equal to" attached to the 5.

The range is the set of possible y outputs. The lowest we can go is y = -4, but we don't include this as part of the range. The largest y can get is y = 3. So the range is $-4 < y \le 3$

===========================================

Problem 2

Answers:

Domain: $-2 < x < 4$

Range: $-2 < y < 5$

--------------------

Explanation:

We use the same idea as in problem 1. Both endpoints are open holes, so we don't include them as part of the domain and range. For instance, we can't include x = 4 but we can get closer and closer to it. The same idea applies to the range as well.

===========================================

Problem 3

Answers:

Domain: $1 \le x \le 4$

Range: $-4 \le y \le -1$

--------------------

Explanation:

The same idea applies as used earlier. This time we include both endpoints, so we have "or equal to" as part of each inequality sign.

5 0

3 years ago