2/5 of a number is 14 what’s the number

Mathematics

1 answer:

Ainat [17]3 years ago

7 0

35 is the answer to your question

You might be interested in

Evaluate the expression.

PilotLPTM [1.2K]

4x-5y

4x3=12

5x2=10

12-10=2

5 0

4 years ago

A financial advisor is analyzing a family's estate plan. The amount of money that the family has invested in different real esta

Pachacha [2.7K]

Answer:

The amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

Step-by-step explanation:

Let the random variable X represent the amount of money that the family has invested in different real estate properties.

The random variable X follows a Normal distribution with parameters μ = $225,000 and σ = $50,000.

It is provided that the family has invested in n = 10 different real estate properties.

Then the mean and standard deviation of amount of money that the family has invested in these 10 different real estate properties is:

$\mu_{\bar x}=\mu=\$225,000\\\\\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}=\frac{50000}{\sqrt{10}}=15811.39$

Now the lowest 80% of the amount invested can be represented as follows:

$P(\bar X$

The value of z is 0.84.

*Use a z-table.

Compute the value of the mean amount invested as follows:

$\bar x=\mu_{\bar x}+z\cdot \sigma_{\bar x}$

$=225000+(0.84\times 15811.39)\\\\=225000+13281.5676\\\\=238281.5676\\\\\approx 238281.57$

Thus, the amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

6 0

3 years ago

Use the percent bar model to find the missing percent.

Basile [38]

The missing percent is 70

7/10 times 10 is 70/100 which is 70 %

4 0

3 years ago

Help a girl out (2a^3−5a)−(7a+3a^2)

Anna007 [38]

For this case we must simplify the following expression:

$(2a ^ 3-5a) - (7a+ 3a ^ 2) =$