Answer:
$33.33 (rounded to nearest cent)
Step-by-step explanation:
12 pizzas --- $20
20 pizzas --- 
× $20 = $33.33 (rounded to nearest cent)
Answer:
$5750
Step-by-step explanation:
For simple interest,
I = prt
115 = p × 0.03 × 8/12
p = 5750
R * s = 273
r = s - 8.....s = r + 8
r(r + 8) = 273
r^2 + 8r = 273
r^2 + 8r - 273 = 0
(r - 13)(r + 21) = 0
r - 13 = 0
r = 13
r + 21 = 0
r = -21.....extraneous solution...not ur answer
r = 13
s = r + 8 = 13 + 8 = 21
so there are 13 rows.....each row containing 21 seats
By engulfing and digesting them
X^2 + x + 1 + 3x^2 + 3x + 2. Just combine the like terms:
x^2 + 3x^2 + x + 3x + 1 + 2
4x^2 + 4x + 3. <--- the sum.
