Answer:
(3x - 7y)(3x + 7y)
Step-by-step explanation:
9x² - 49y² ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
here 9x² = (3x)² ⇒ a = 3x and 49y² = (7y) ⇒ b = 7y
9x² - 49y²
= (3x)² - (7y)² = (3x - 7y)(3x + 7y)
Answer:
yeyes
Step-by-step explanation:
TO get 6% of 20 we have to write 6% in decimal (or fraction if u want but decimal allows u to multiply it easier i think)
6%=0.06=
Now u have to mulitply 0.06 times 20
0.06*20=1.2 - its the result
Answer:
A. 30 for everyone in class | B. 12 Boys in the class
Step-by-step explanation: