The image is attached with the answer.
<h3>What is a Magic Square ?</h3>
A magic square is a 3*3 , 4*4 ,5*5 square in which the magic sum is constant for all the columns and rows and even diagonally the sum is same.
The empty squares have been filled and the image has been attached.
The magic sum is 0.81
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Answer:
c. -8
Step-by-step explanation:
Given:
![\frac{4b \div c}{1 - a}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4b%20%5Cdiv%20c%7D%7B1%20-%20a%7D%20)
a = 5, b = 8, and c = 1
To evaluate, plug in the values into the expression given.
Thus:
![\frac{4(8) \div 1}{1 - 5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%288%29%20%5Cdiv%201%7D%7B1%20-%205%7D%20)
![\frac{32 \div 1}{1 - 5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B32%20%5Cdiv%201%7D%7B1%20-%205%7D%20)
![\frac{32}{-4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B32%7D%7B-4%7D%20)
![\frac{8}{-1} = - 8](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B-1%7D%20%3D%20-%208%20)
Answer:
![21d+25\leq 115](https://tex.z-dn.net/?f=21d%2B25%5Cleq%20115)
Max is 4 days.
Step-by-step explanation:
An inequality is a math statement with more the one solution. The solution has a range of values for which the inequality can be satisfied. It has the same following components as an equation: variables and operations. However, the equal sign is replaced by an inequality sign:
.
We start by choosing a variable for an unknown value. Here is it the number of days he rents the car. We choose d.
We know he rents it for $21 pr day or 21d for any number of days. We also know her will drive 250 miles at $0.10 per mile or 0.10(250). We will combine the two into an expression.
21d + 0.10(250)
We know his limit is $115. This means he can rent the car for any number of days until he reaches $115. The charge must be less than or equal to 115.
So we write
.
To find the number of days he can rent the car, we solve for d using inverse operations.
![21d+0.10(250)\leq 115\\21d+25\leq 115\\21d+25-25\leq 115-25\\21d\leq 90\\\frac{21d}{21} \leq \frac{90}{21}\\d\leq 4.3](https://tex.z-dn.net/?f=21d%2B0.10%28250%29%5Cleq%20115%5C%5C21d%2B25%5Cleq%20115%5C%5C21d%2B25-25%5Cleq%20115-25%5C%5C21d%5Cleq%2090%5C%5C%5Cfrac%7B21d%7D%7B21%7D%20%5Cleq%20%5Cfrac%7B90%7D%7B21%7D%5C%5Cd%5Cleq%204.3)
This means Jim can rent the car up to 4 days. The 5th day will put the cost over $115.