Use the property
(a -b)(a+ b) = a^2 - b^2
49x^2 - 81 = (7x + 9)((7x - 9)
Answer:
2 points
Step-by-step explanation:
10-14=-4
-4+6=2 or
10+6=16
16-14=2
the first 5 is in the thousands place. The second 5 is in the hundredths place.
Answer: The speed of the turtle can be found by dividing distance by time.
Michelle is the fastest turtle.
The fastest turtle is 6cm per minute
First turtle walks 3cm a minute
Second turtle walks 6cm a minute
Third turtle also walks 3cm a minute