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daser333 [38]
3 years ago
8

The sum of two numbers is 87, and one number is eleven more than the other. fing the number​

Mathematics
1 answer:
lara31 [8.8K]3 years ago
4 0

Answer: 49 and 38

Step-by-step explanation:

I did trial and error

38+11=49

49+38=87

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Calculate the volume of the triangular pyramid below.
eduard

Answer:

90

Step-by-step explanation:

1/2x10x3.6=18

18x5=90

8 0
2 years ago
Given the matrices: 1 2 A= 1 -1 2 1 1 B= 3 4 Calculate AB: C11 C12 [2.1] х 1 2 3 4 C21 C22 C11 = C12 = -2 C22 - C215 DONE​
eduard

Answer:

\:c_{11}=-2,\:\:\:c_{12}=-2

\:c_{21}=5,\:\:\:c_{22}=8

Step-by-step explanation:

Given the matrices

A=\begin{pmatrix}1&-1\\ 2&1\end{pmatrix}

B=\begin{pmatrix}1&2\\ \:3&4\end{pmatrix}

Calculating AB:

\begin{pmatrix}1&-1\\ \:\:2&1\end{pmatrix}\times \:\begin{pmatrix}1&2\\ \:\:3&4\end{pmatrix}=\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}

Multiply the rows of the first matrix by the columns of the second matrix

                                   =\begin{pmatrix}1\cdot \:1+\left(-1\right)\cdot \:3&1\cdot \:2+\left(-1\right)\cdot \:4\\ 2\cdot \:1+1\cdot \:3&2\cdot \:2+1\cdot \:4\end{pmatrix}

                                   =\begin{pmatrix}-2&-2\\ 5&8\end{pmatrix}

Hence,

\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}=\begin{pmatrix}-2&-2\\ \:5&8\end{pmatrix}

Therefore,

\:c_{11}=-2,\:\:\:c_{12}=-2

\:c_{21}=5,\:\:\:c_{22}=8

5 0
2 years ago
Read 2 more answers
What is the frequency of the function f(x)?<br> Express the answer in fraction form.
Reil [10]

Answer:

<u>Frequency = 1/period = \frac{1}{8\pi }</u>

Step-by-step explanation:

The frequency of the sinusoidal function = 1/period

Frequency is how many the function repeats itself per unit if time i.e: per "1"

For the given graph :

\frac{x}{4} =Bx , Where: B = 2π/period

period = 2π/B  ,   B = 1/4 = 0.25

∴ Period = 2π/0.25 = 8π

∴ Frequency = 1/period = \frac{1}{8\pi }

3 0
2 years ago
2 2/3 + 4 1/8 reduced to lowest terms
Olegator [25]

Answer:

6 19/24

Step-by-step explanation:

2 2/3 + 4 1/8

3 times 8 to find the common denominator which then gives you

2 16/24 + 4 3/24

That equals

6 19/24

Mark me as brainliest if this helps!

3 0
3 years ago
Read 2 more answers
What is the GCF of 36 and 84?<br><br> 4<br><br> 6<br><br> 12<br><br> 18
Vadim26 [7]
The greatest common factor is 12 because 12 times 3 is 36 and 12 times 7 is 84.

Hope this helps! :)
7 0
3 years ago
Read 2 more answers
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