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3 years ago

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:

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)? Express the answer in fraction form.

Reil [10]

Answer:

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

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

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What is the GCF of 36 and 84? 4 6 12 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

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

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