Answer:
4829
Step-by-step explanation:
If the first digit is half of the second, that means the second is 2 times the first
So let's solve this algebraically...
The first digit could be called <em>a</em>
The second digit would have to be 2 times a (2a)
We can call the 3rd digit b
Since the sum of the second and third digit is 10, the equation would be this..
2x + b = 10, which is the same as b = 10 - 2x
The fourth digit is this equation
2x + 1
So the four digits are...
x, 2x, 10-2x, 2x+1
They are all equal to 23, which means...
x + 2x + 10-2x + 2x +1 = 23
After simplifying...
3x + 11 = 23
3x = 23 - 11
Which means...
3x = 12, x = 4
After you plug all that back into the prior equation you should get
first digit = 4 second digit = 8 third digit = 2 fourth digit = 9
Thank me later :)
(or just mark brainliest)
Answer:
4.62910049578
Step-by-step explanation:
variation is standard deviation squared
variance = 21.428571428571
square root variance for answer.
11 • 55 = 55
The starfish had 55 arms all together.
Hope this helps!
Answer:
Situation 3 is not functional
Step-by-step explanation:
Here, we want to determine if there exists a functional relationship between the properties in each situation.
For there to exist a functional relationship, then one of the factors in the situation must be dependent on the other factor in the situation.
Let us consider the situations individually now;
Situation 1
There exists a functional relationship here. This is because the higher the minutes used, the higher the cell phone bill and the lower the minutes used, the lower the cell phone bill. This is because there exists a fixed rate of charge per minute
Situation 2
There exists a functional relationship here too.
This is because, the we cannot find the perimeter of the square without knowing the measure of the sides of the square. That is why there is a mathematical formula that links the perimeter of the square to the sides of the square.
In a case where we have the perimeter as P and the sides as L
Then the functional equation linking both is;
P(l ) = 4 L
Situation 3;
There is no functional relationship here. The amount owed per each credit card is tied to the credit card in question.
There is no way the total amount owed by a person is distributed across the number of credit cards the person have. Each credit card has its own money charged on it monthly due to the activities on it which is independent on the activities of the other credit cards
