D=(S+8)/C
S=DC-8
add 8 to both sides
S+8=DC
divide c from both sides
(S+8)/C=D
219.6\100= 2.196
2.196*20= 43.92
219.6-43.92= 175.68
This might be the answer, quite rough in this topic.
B because 1/4 people own individual stocks. 1/4 of 12 is 3.
Answer:
see explanation
Step-by-step explanation:
A
25x² - 40x + 16 ← is a perfect square of the form
(ax - b)² = a²x² - 2abx + b²
Comparing the coefficients of like terms in the 2 expressions
a² = 25 ⇒ a = 5, b² = 16 ⇒ b = 4
and 2 × 5 × 4 = 40, thus
25x² - 40x + 16 = (5x - 4)²
The side of the square = 5x - 4
B
25x² - 16y² ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b), thus
25x² - 16y²
= (5x)² - (4y)² = (5x - 4y)(5x + 4y)
Dimensions of rectangle are 5x - 4 and 5x + 4
