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3 years ago

There are 12 students in a jewelry-making class and 8 sets of charms. What fraction of a set of charms will each student get?

Mathematics

2 answers:

LekaFEV [45]3 years ago

5 0

2/3 because 8 divided by 12 is 8/12 but you have to round it and you would get 2/3

mart [117]3 years ago

3 0

Answer: 2/3 set of charms

Step-by-step explanation:

There are 12 students in a jewelry making class with 8 sets of charms to be divided among the twelve students.

The fraction of set of charms gotten by each student will be the set of charms divided by the total number of students. Mathematically, this will be :

Number of students= 12

Total set of charms= 8

Each student will get = 8/12 = 2/3

Each student will get 2/3 set of charms of jewellery.

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The distribution of IQ scores can be modeled by a normal distribution with mean 100 and standard deviation 15.

evablogger [386]

Answer:

4.4% of the population with IQ between 120 and 125.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 100

Standard Deviation, σ = 15

We are given that the distribution of IQ scores is a bell shaped distribution that is a normal distribution.

a) Let X be a person's IQ score.

Then, density functions for IQ scores is given by:

$P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{z^2}{2}}\\\\\text{where,}\\\\z = \frac{x-\mu}{\sigma}\\\\P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{(x-\mu)^2}{2\sigma^2}}\\\\P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{(x-100)^2}{450}}$

b) P(population with IQ between 120 and 125.)

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

$P(120 \leq x \leq 125) = P(\displaystyle\frac{120 - 100}{15} \leq z \leq \displaystyle\frac{125-100}{15}) = P(1.33 \leq z \leq 1.66)\\\\= P(z \leq 1.66) - P(z < 1.33)\\= 0.952 - 0.908 = 0.044 = 4.4\%$

$P(120 \leq x \leq 125) = 4.4\%$

6 0

2 years ago

A wallet is originally $11.00. With a 40% discount, what is the sales price? Show your work.

NeX [460]

Answer:

$6.6

Step-by-step explanation:

you want to find out what 40% of the original price is ($11)

100% = 11

10%= 1.1

to get 40% you times it by 4

40%= 4.4

you then have to take away the sale reduction from the original

11- 4.4 =$6.6

8 0

2 years ago

Percy use hose to wash pig sty for 11 minutes. The hose uses 7 liters of water every minute how many liters did percy pig use to

kykrilka [37]

Answer:

Percy used 77 liters to wash

Step-by-step explanation:

This question can be solved using a rule of three.

Each minute of washing costs 7 liters.

She washed for 11 minutes.

1 minute - 7 liters

11 minutes - x liters

x = 7*11 = 77

Percy used 77 liters to wash

6 0

2 years ago

Can someone answer this easy question 46 plus what equals 77

Reika [66]

Answer:

Step-by-step explanation:

46+x=77 subtract 46 from both sides

x=31

4 0

2 years ago

(-10/9)(-9/4) both fractions are negative. I tried changing the numerators and denominators to their common factors but got stuc

DiKsa [7]

2 negatives make a positive

5 0

3 years ago