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3 years ago

GUCTION

Mathematics

2 answers:

Sidana [21]3 years ago

8 0

Answer:

$284 would be the new balance.

Step-by-step explanation:

186 - 174 - 35 - 99 + 406= 284

NeX [460]3 years ago

5 0

Answer:

The new credit card balance is $88

Step-by-step explanation:

The balance of a credit card is what we owe to the credit card company.

Therefore to get the new balance we start with the given previous balance of $186 and then we add to it the value of items you purchased (Books: $174, CDs: $35, shoes $99) and then you subtract the payment of $406 that you did to the company:

$\$186+\$174+\$35+\$99-\$406=\$88$

Therefore, you now owe to the credit card company $88 that is the new balance.

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Relationships between means, standard deviations, X values,and z-scores

Vlada [557]

Answer:

a) The average salary of firefighters in Portugal is $583.

b) The standard deviation of the salary of firefighters in Portugal is $319.8

Step-by-step explanation:

We are given the following in the question:

a) Standard Deviation, σ = $145.80

We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.

Formula:

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

A salary of $510.10 has a z-score of -0.50.

Putting values, we get,

$-0.50 = \displaystyle\frac{510.10-\mu}{145.80}\\\\\mu = 0.50(145.80) + 510.10\\\Rightarrow \mu = 583$

Thus, the average salary of firefighters in Portugal is $583.

b) Mean, μ = $2,132

We are given that the distribution of salary of computer programmers is a bell shaped distribution that is a normal distribution.

Formula:

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

The salary of $2,291.90 has a z-score of +0.50

Putting values, we get,

$0.50 = \displaystyle\frac{2291.90-2132}{\sigma}\\\\\sigma= \frac{2291.90-2132}{0.50}\\\\\sigma = 319.8$

Thus, the standard deviation of the salary of firefighters in Portugal is $319.8

6 0

4 years ago

What is the product?

kobusy [5.1K]

Answer:

$\begin{bmatrix}7\\ 4\\ 2\end{bmatrix}$

Step-by-step explanation:

We have the product, $\begin{bmatrix} 3& 6& 1\\ 2& 4& 0\\ 0& 6& 2\end{bmatrix}\times \begin{bmatrix}2\\ 0\\ 1\end{bmatrix}$ .

As, we have the product of a 3×3 and 3×1 matrix, the resultant matrix will be of order 3×1.

So, we get,

$\begin{bmatrix} 3& 6& 1\\ 2& 4& 0\\ 0&6&2\end{bmatrix}\times \begin{bmatrix}2\\ 0\\ 1\end{bmatrix}$

⇒ $\begin{bmatrix}3\times 2+6\times 0+1\times 1\\ 2\times 2+4\times 0+0\times 1\\ 0\times 2+6\times 0+2\times 1\end{bmatrix}$

⇒ $\begin{bmatrix}7\\ 4\\ 2\end{bmatrix}$ .

Thus, the resulting product is $\begin{bmatrix}7\\ 4\\ 2\end{bmatrix}$ .

7 0

3 years ago

Math question:<br><br> -4x greater than equal to 8<br><br> please show work

Lisa [10]

$-4x\geq8\\
x\leq-2$

5 0

3 years ago

Read 2 more answers

Pls help I’ll give extra points

Hunter-Best [27]

Answer: help with what? whats the question?

Step-by-step explanation:

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3 years ago

RSM question need answer today 3-6-20

SpyIntel [72]

Answer:

So, a solution composed of 1188 grams of water and 12 grams of sugar will be 99% water and 1% sugar

Step-by-step explanation:

3 0

3 years ago