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Akimi4 [234]
2 years ago
13

What are the zeros of f(x) x^2-x-20

Mathematics
2 answers:
PolarNik [594]2 years ago
8 0

Answer:

x = - 4, x = 5

Step-by-step explanation:

To find the zeros equate f(x) to zero, that is

x² - x - 20 = 0

Consider the factors of the constant term (- 20) which sum to give the coefficient of the x- term (- 1)

The factors are - 5 and + 4, since

- 5 × 4 = - 20 and - 5 + 4 = - 1, thus

(x - 5)(x + 4) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 4 = 0 ⇒ x = - 4

x - 5 = 0 ⇒ x = 5

EastWind [94]2 years ago
6 0

Answer:

x= -4 and x= 5

Step-by-step explanation:

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The solution for a system of two linear equations is (0, 0). Which equation below could be one of the equations in the system? A
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Answer:

y = -3x

Step-by-step explanation:

For the equation to be a part of a system, the point (0,0) must be a part of the line. Since y = -3x is proportional meaning b = 0, its y-intercept is (0,0). This means it must cross through and include (0,0). This is a part of the system.

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3 years ago
HELP FAST PLS-<br> 10 is what percent of 118? <br> PLEASE SHOW ALL YOUR WORK
Fudgin [204]

Answer:

10 is ≈8.47% of 118

Step-by-step

(10/118)(100)

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2 years ago
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5!=5*4*3*2*1;6!=6*5*4*3*2*1 What is the value of 4^4/4!
german

Answer:

\frac{32}{3}

Step-by-step explanation:

If 5! is equal to 5 × 4 × 3 × 2 × 1 and 6! is equal to 6 × 5 × 4 × 3 × 2 × 1, then 4! is equal to 4 × 3 × 2 × 1. Thus, 4! = 4 × 3 × 2 × 1, which can simplify to 24. 4! = 24.

4^{4} is basically 4 × 4 × 4 × 4, which can simplify to 256.

So,  \frac{4^{4}}{4!} = \frac{256}{24}.  \frac{256}{24} can simplify to \frac{32}{3}. Therefore,  \frac{4^{4}}{4!} = \frac{32}{3}.

3 0
2 years ago
Can someone help me figure out the answer?
Marina86 [1]

Answer:

f(t) = 5×0.87^t

Step-by-step explanation:

The general form for an exponential function described in this fashion is ...

... f(t) = (starting value) × (1 + (percent change))^t

Here, the "percent change" is -13%, or -0.13.

Then the value (1 + percent change) is (1 + (-0.13)) = 0.87. Putting this and the starting value into the form above, we have ...

... f(t) = 5 × 0.87^t

3 0
2 years ago
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