Answer:
P(x) =x³-4x²-31x+70
Step-by-step explanation:
The function is expressed as:
P(x) = (x+5)(x-2)(x-7)
P(x) =(x²-2x+5x-10)(x-7)
P(x) = (x²+3x-10)(x-7)
P(x) = x³-7x²+3x²-21x-10x+70
P(x) =x³-4x²-31x+70
Hence the polynomial is P(x) =x³-4x²-31x+70
1200/8 = 150 thus, 150 per calorie. 150 x 3 = 450 :)
Answer:
Step-by-step explanation:
The motorist drove at a distance of 90km at a constant speed for the first 40km, and then 20 km/hr faster for the rest of the journey.
The whole journey took him 1hr.
Let S denotes the average speed (in km/hr) for the first 40 km.
Hence we get the following relation,
40/S + (90 - 40)/(S + 20) = 1
or 50/(S + 20) = 1 - 40/S = (S - 40)/S
or (S + 20)(S - 40) = 50S or S^2 - 70S - 800 = 0 or (S - 80)(S + 10) = 0
or S = 80 (km/hr) [Ans]
[S cannot be negative value]
Answer: b₂=2A/h-b₁
Step-by-step explanation:
A =1/2 (b₁ + b₂)h
2A=(b₁ + b₂)h
2A/h=b₁ + b₂
b₂=2A/h-b₁
