the operation:

Gives a square number.
<h3>
How to get a perfect square?</h3>
A perfect square is the product of a number and itself.
As you can see in the example, 16 is a square number. Then let's try to get 16.
To get 16 we can use the difference:
20 - 4
So the first therm needs to be equal to 20, and the second equal to 4.
To write 20 in scientific notation we have:

To write 4 in in scientific notation:

Then the operation:

Gives a square number.
If you want to learn more about square numbers:
brainly.com/question/21694652
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Answer:
b
Step-by-step explanation:
Those are vertical angles meaning that they are of equal measure. set the 2 measures equal and solve for x
3x - 25 = 6x - 80
55 = 3x
x = 18 1/3 - use this number to plug back in to calculate the actual angle measures
Answer:
The expression 40n+15p shows the amount paid by the newspaper if Alexis and Paige are hired together.
Step-by-step explanation:
Given that:
Alexis charges $25 for each news story and $5 per picture.
Let,
n represent the number of news stories and p represent the number of pictures.
Alexis' total charges = 
Paige charges $15 for each news story and $10 per picture.
The variables will be same.
Paige's total charges = 
Alexis and Paige's charges will be added if newspaper hire them together.
Total charges paid by newspaper = 
Hence,
The expression 40n+15p shows the amount paid by the newspaper if Alexis and Paige are hired together.
Answer:
Step-by-step explanation:
y=(x-a)²+h
vertex (a,h)
axis of symmetry x-a=0 or x=a
x-intercepts (none)
y-intercepts (none)
graph upper parabola (don't understand what it requires )
Domain (-∞,∞)
Range [0,∞)