Answer:42 percent
Step-by-step explanation:
20 divided by 48
Answer:
197.9
Step-by-step explanation:
The formula for circumference is 2(pi)r and r is the radius
The diameter is two times the size of the radius, so by dividing the diameter by two, you can get the radius
So, r=63/2
r= 31.5
That means that 2(pi)(31.5) is the circumference
2(pi)(31.5) = 197.9 (rounded to the nearest tenth)
Step-by-step explanation:
Cost of CDs
= Number of CDs * Cost of one CD
= d * $12
= $12d. (D)
The answer is using multiplication as we have a unit rate and we wish to find the total.
The dimensions of the matrix are 3 by 3 i.e. 3 x 3, and the indicated element a₂₃ is -7
<h3>The dimension of the matrix?</h3>
From the figure in the question, we have the following highlights:
- The matrix has 3 rows
- The matrix has 3 columns
The dimensions of a matrix are represented by: Row by column
Hence, the dimensions of the matrix are 3 by 3
<h3>The indicated element</h3>
This is given as:
a₂₃
This means that the element is located at the second row and the third column.
The element at this position is -7
Hence, the indicated element is -7
Read more about matrix at:
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This can be solved using a system of equations.
![\left \{ {{x+y=80} \atop {x-4y=10} \right. ](https://tex.z-dn.net/?f=%20%5Cleft%20%5C%7B%20%7B%7Bx%2By%3D80%7D%20%5Catop%20%7Bx-4y%3D10%7D%20%5Cright.%20%0A)
Subtract y from both sides.
![x=80-y](https://tex.z-dn.net/?f=x%3D80-y)
Substitute:
![80-y-4y=80-5y=10](https://tex.z-dn.net/?f=80-y-4y%3D80-5y%3D10)
Subtract 80 from both sides:
![5y=70](https://tex.z-dn.net/?f=5y%3D70)
Divide both sides by 5:
![y= \frac{70}{5} =14](https://tex.z-dn.net/?f=y%3D%20%5Cfrac%7B70%7D%7B5%7D%20%3D14)
Substitute.