Answer:
350
Step-by-step explanation:
P(x) = 8 + 7x – 10x² = -10x² + 7x +8
The coefficient of x² is -10, the parabola has a maximum
x(max) = - (7 / 2 x (-10)) = 7 / 20
speakers should sold: 1000 x 7/20 = 350
Answer:
All except 35
Step-by-step explanation:
8, 40, 80 and 288 is a multiple of 4.
90 is a multiple of 9.
Answer:
m∠B = 141°
Step-by-step explanation:
sides of polygon (n) = 7
sum of angles of polygon = {(n - 2) * 180°}
= {(7 -2)*180°}
= 5* 180°
= 900°
Now,
m∠B = 900° - 148° - 142° - 130° - 129° - 120° - 90°
m∠B = 141°