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ivolga24 [154]
2 years ago
9

If f(x) = -2x2 + x-5, what is f(3)?

Mathematics
1 answer:
Ilia_Sergeevich [38]2 years ago
7 0

Answer:

f(3) = -20

Step-by-step explanation:

Replace each instance of x in 3^2x -9 =0 with 3:

f(x) = -2x2 + x-5 =  f(x) = -2x^2 + x-5 (" ^ " represents "exponentiation")

f(3) = -2(3)^2 + 3 - 5

f(3) = - 18 - 2 = -20

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Answer:

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Step-by-step explanation:

7k - 3k=4k

4k+11=4011

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2 years ago
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An angle's supplement is nine times of its complementary angle. Find the measure of the angle, the complement of the angle,and t
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S = 9C
first sentence written as an expression
Where S represents the angles supplement
and C represents the angles complement
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definition of complimentary allows this statement
now add the prior 2 statements together
A + S + A + C = 180 + 90
now simplify
2A + S + C = 270
now replace S with 9C using first statement
2A + 9C + C = 270
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now divide both sides by 2
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now using the second statement isolate A by adding C to both sides
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now combine the two prior statements
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now simplify
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now subtract 90 from both sides
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now divide both sides by 4
C = 11.25
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now take the third equation and substitute in C
A + 11.25 = 90
now subtract 11.25 from both sides
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Answer:

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Step-by-step explanation:

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Answer:

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