D: 11x + 12, you just add all of the x values together and you’re set.
Answer:
The answer is B.
Step-by-step explanation:
Answer: C) Sometimes positive; sometimes negative
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Explanation:
Pick a value between x = -1 and x = 0. Let's say we go for x = -0.5
Plug this into f(x)
f(x) = x(x+3)(x+1)(x-4)
f(-0.5) = -0.5(-0.5+3)(-0.5+1)(-0.5-4)
f(-0.5) = -0.5(2.5)(0.5)(-4.5)
f(-0.5) = 2.8125
We get a positive value.
This shows that f(x) is positive on the region of -1 < x < 0
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Now pick a value between x = 0 and x = 4. I'll use x = 1
f(x) = x(x+3)(x+1)(x-4)
f(1) = 1(1+3)(1+1)(1-4)
f(1) = 1(4)(2)(-3)
f(1) = -24
Therefore, f(x) is negative on the interval 0 < x < 4
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In short, f(x) is both positive and negative on the interval -1 < x < 4
It's positive when -1 < x < 0
And it's negative when 0 < x < 4
Answer: 1,296,000 inches
Step-by-step explanation:
Step 1: 100 yards to feet, is 300 feet, considering that 1 yard = 3 feet.
Step 2: 300 feet to inches is 3600, because one foot = 12 inches.
Step 3: 30 feet to inches is 360, because 30 x 12 = 360.
Step 4: 3600 x 360 = 1,296,000 inches.
It’s a cubic polynomial since highest power is three.
