Answer:
16
Step-by-step explanation:
Line 1: ◄ + ◄ + ◄ = 30
3◄ = 30
◄ = 10
The triangle equals 10.
Line 2: ◄ + ◘ + ◘ = 18
10 + 2◘ = 18
2◘ = 8
◘ = 4
The square equals 4.
Line 3: ◘ - ○ = 2
4 - ○ = 2
-○ = -2
○ = 2
The circle equals 2.
○ + ◄ + ◘ = 2 + 10 + 4 = 16
Answer: 16
I. is true.
II. is true.
III. is false.
Answer is choice B.
Thanks for using brainly!B. 0.3 would be the answer.
Plug x = 0 into the function
f(x) = x^3 + 2x - 1
f(0) = 0^3 + 2(0) - 1
f(0) = -1
Note how the result is negative. The actual number itself doesn't matter. All we care about is the sign of the result.
Repeat for x = 1
f(x) = x^3 + 2x - 1
f(1) = 1^3 + 2(1) - 1
f(1) = 2
This result is positive.
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We found that f(0) = -1 and f(1) = 2. The first output -1 is negative while the second output 2 is positive. Going from negative to positive means that, at some point, we will hit y = 0. We might have multiple instances of this happening, or just one. We don't know for sure. The only thing we do know is that there is at least one root in this interval.
To actually find this root, you'll need to use a graphing calculator because the root is some complicated decimal value. Using a graphing calculator, you should find the root to be approximately 0.4533976515
