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Sloan [31]
2 years ago
7

Consider the function f(x) = -4x²-9x+20. Determine f(-2)=

Mathematics
1 answer:
hoa [83]2 years ago
3 0

Step-by-step explanation:

  • you just substitute (-2) into the x values of the above function
  1. f( - 2) =  - 4( - 2)^{2}  - 9( - 2) + 20 \\ f( - 2) = 22
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

<em>r's</em><em> your</em><em> solution</em>

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3 years ago
What happens to the value of the expression 80-2r as r decreases?
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Answer:The value of the expression increases as r decreases.

Step-by-step explanation:

To find : What happens to the value of the expression as r decreases?

Given Expression: 80-2r

We check for different value of r as decreasing order,

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5        80-10=70

4        80-8=72

3        80-6=74

2        80-4=76

1         80-2=78

As r decreases the value of expression increases.

Therefore, the value of the expression increases as r decreases.

Hope this helps!

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