Answer:
The third option (9+
--
)
Step-by-step explanation:
With FOIL, this can be expanded. (a+b)(a-b) is equal to a²+ab-ab-b² or a²-b².
In this case, all the answers have 4 terms, so we want the first option. This makes the equation 3²+(3×
)-(3×)-()².
Solving these gives 9+--7. This is the same as 9+--.
**This content involves multiplying with surds and expanding perfect squares, which you may wish to revise. I'm always happy to help!
Answer:
10! because 3 to get 15 is 5 and 2×5 is 10
Answer:
3 miles in a hour
Step-by-step explanation:
2/3÷2/9
=6/2
=3 miles in a hour
The answer is 18/5.
change the mixed number to an improper fraction by multiplying the whole number 3 by the denominator of the fraction so 3*5=15
then add 15+3=18 (the 3 you added came from the numerator of the fraction)
then place 18 over 5
your improper fraction is 18/5
