For this case we must find an expression equivalent to:
We apply distributive property, term by term, taking into account that:
By definition we have to, to multiply powers of the same base, the same base is placed and the exponents are added:
We add similar terms taking into account that:
Equal signs are added and the same sign is placed.
Different signs are subtracted and the major sign is placed.
Answer:
An equivalent expression is:
Answer:
C. (7x + 4)(7x − 4)
Step-by-step explanation:
Given expression:
49x² - 16
Using difference of two squares:
A² - B² = (A + B)(A - B)
49x² - 16 = (7x)² - (4)²
= (7x + 4)(7x - 4)
C. (7x + 4)(7x − 4)
Check:
(7x + 4)(7x − 4)
Open parenthesis
= 49x² - 28x + 28x - 16
= 49x² - 16
Answer:
20 people
Step-by-step explanation:
22 pancakes = 8 people
55 pancakes = x people
=> Cross-multiply
=> 22 * x = 55 * 8
=> 22x = 440
=> 22x/22 = 440/22
=> x = 20
So, 55 pancakes can feed 20 people.