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3 years ago

Simplify this equation, also what is the sign beside 150 and what does it do

Mathematics

1 answer:

Solnce55 [7]3 years ago

6 0

Answer:

<h2>hope it helps you see the attachment for further information ✌✌✌✌✌</h2>

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PLEASE HELP I'm having trouble

Anastasy [175]

Answer:

$c_{11}=56.1$

$c_{12}=12.1$

$c_{13}=236$

Step-by-step explanation:

The product of two matrices $X_{m\times{n}}$ and $Y_{n\times{r}}$ equals a matrix $M_{m\times{r}}$ , where the first element of the subscript represents the amount of files of the matrix and the second element represents the amount of columns of the matrix.
Then, in this case $A_{1\times{3}}$ $B_{3\times{3}}$ , therefore, its product will result a matrix $C_{1\times{3}}$ .
Because C matrix is going to have an only file and three columns, we now have to find the values of the elements in each column, based on the elements of A and B.
Commonly, to obtain the values of the resulting matrix, we just have to multiply each file of the first matrix by each column of the second matrix and sum, as follows:

$c_{11}=77\times1.2+39\times2.2-33\times3.7=56.1$
$c_{12}=77\times1.4+39\times1.1-33\times4.2=12.1$
$c_{13}=77\times3.1+39\times5.6-33\times6.7=236$

Finally, C matrix is $\begin{pmatrix}\56.1 & 12.1& 236\end{pmatrix}$

4 0

2 years ago

23/5+99/5-5/5 Help LOL kk want random points

mojhsa [17]

Answer:

23.4

Step-by-step explanation:

23/5+99/5-5/5= 23.4

hope this helps....

5 0

2 years ago

Read 2 more answers

A randomly selected sample of n =51 men in Brazil had an average lifespan of 59 years. The standard deviation was 10 years. Calc

Aloiza [94]

Answer:

$59-2.40\frac{10}{\sqrt{51}}=55.639$

$59+ 2.40\frac{10}{\sqrt{51}}=62.361$

The 98% confidence interval would be given by (55.639;62.361)

Step-by-step explanation:

Information given

$\bar X= 59$ represent the sample mean

$s= 10$ represent the sample deviation

$n= 51$ represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=51-1=50$

The Confidence is 0.98 or 98%, the significance would be $\alpha=0.02$ and $\alpha/2 =0.01$ ,and the critical value would be $t_{\alpha/2}=2.40$

And replacing we got:

$59-2.40\frac{10}{\sqrt{51}}=55.639$

$59+ 2.40\frac{10}{\sqrt{51}}=62.361$

The 98% confidence interval would be given by (55.639;62.361)

3 0

3 years ago

The base of a regular pyramid is a hexagon

Readme [11.4K]

Answer:

Below in bold.

Step-by-step explanation:

The hexagon is made up of 6 equilateral triangles.

So the Base = 12 cm.

Height a = 12 cos 30 = 10.392 cm

So area of 1 triangle = 1/2 * 12 * 10.392 cm^2

- and total area = 6 * 1/2 * 12 * 10.392

= 36 * 10.392

= 374.11 cm^2 to the nearest hundredth.

7 0

1 year ago

Darren is 30 and is debating whether he should start investing $100 a month now for retirement at 60 or if he should wait until

faltersainse [42]

Hi there
The formula of the future value of annuity due because you invest now means you invest at the beginning of each month

Fv=pmt [(1+r/k)^(kn)-1)÷(r/k)]×(1+r/k)
The first option you invest 100 at the beginning of each month for 30 years (60-30) therefore
Fv=100×((((1+0.1÷12)^(12×30)
−1)÷(0.1÷12))×(1+0.1÷12))
=227,932.53...is higher

The second option you invest 200 at the beginning of each month for 20 years (60-40) therefore
Fv=200×((((1+0.1÷12)^(12×20)
−1)÷(0.1÷12))×(1+0.1÷12))
=153,139.38...is lower

So I would choose the first option which is invest 100 due to higher amount

Hope it helps

7 0

3 years ago