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3 years ago

Given the function f(x) = −5x2 − x + 20, find f(3).−28−136264

Mathematics

2 answers:

Flura [38]3 years ago

6 0

f(x) = −5x2 − x + 20, find f(3).

Substitute x = 3 into the function

f(3) = −5(3)^2 − 3 + 20

f(3) = -45 - 3 + 20

f(3) = -28

Answer

−28

Maslowich3 years ago

5 0

Answer: -28

Step-by-step explanation: The value of given function at x = 3 is -28

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Carbon is found in ALL of these materials seashells, wood, plants, and water.

faltersainse [42]

Answer:

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2 years ago

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Answer:

22.3 km²

Step-by-step explanation:

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3 years ago

A turtle population grows in a manner that closely resembles a geometric sequence. Given the table of values, determine the turt

AleksandrR [38]

The turtle population will be 486 after 5 years.

<u>Step-by-step explanation</u>:

The general form of a geometric progression or geometric sequence is a, ar, ar², ar³ and so on.

where,

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<u>The formula to find the nth term in GP is :</u>

nth term = $ar^{n-1}$

The given sequence 6,18,54.

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3 years ago

Graph the line given by x+y=-2 and the quadratic curve given by y=x²-4. Find all solutions to the system of equations. Verify yo

ycow [4]

Answer:

(1,-3) and (-2,0)

Step-by-step explanation:

$x+y=-2$

$y=x^2-4$

Applying the second equation to the first

$x+x^2-4=-2\\\Rightarrow x+x^2-4+2=0\\\Rightarrow x^2+x-2=0$

Solving the equation we get

$x=\frac{-1+\sqrt{1^2-4\cdot \:1\left(-2\right)}}{2\cdot \:1}, \frac{-1-\sqrt{1^2-4\cdot \:1\left(-2\right)}}{2\cdot \:1}\\\Rightarrow x=1, -2$

When x = 1

$y=-2-1\\\Rightarrow y=-3$

When x = -2

$y=-2-(-2)\\\Rightarrow y=0$

So, the line and curve will intersect at points (1,-3) and (-2,0)

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3 years ago

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