If an expression is the difference of two squares, it will follow this format:

where a and b are integers or variables.
1)

Since the expression follows the format, it's a DoTS.
2) Since the binomial has an addition sign, it isn't a DoTS.
3)

The second term isn't an integer, so the expression isn't a DoTS.
4)

Since the expression follows the format, it's a DoTS.
Therefore, the first and fourth expressions are differences of two squares.
Answer:
325
Step-by-step explanation:
Multiply 13*25 (the total number of packs * the total number in each pack) = 325
ANSWER

EXPLANATION
The given line passes through (1,4) and (3,-4).
The slope of this line is calculated using the formula:

We substitute the points into the slope formula to get:



We substitute the first point and slope into the point-slope formula

This implies that

We expand to get



9514 1404 393
Answer:
180 miles
Step-by-step explanation:
Don drove (50 mi/h)×(2 h) = 100 mi.
Frank drove (40 mi/h)×(2 h) = 80 mi.
Since they drove in opposite directions, the total distance between them is
100 mi +80 mi = 180 mi.
Sorry, didn't see this til now.
-(u-4x-4)=-u+4x+4