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N76 [4]
2 years ago
8

Determine the zeros of the function f(x)=x^2-2x-8.

Mathematics
1 answer:
ozzi2 years ago
6 0
X = 4, -2 that should be the roots(zeros) of the function.
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An arc spans a central angle that is \dfrac{3\pi}{5}
Jobisdone [24]

Answer:

what does \dfrac mean

Step-by-step explanation:

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7 0
2 years ago
The difference between 3.6 and a number is 2.95, as shown below. What number should go in the box to complete the subtraction pr
yulyashka [42]
The answer is going to be .65 because 
1)You subtract 2.95 from 3.6
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4 0
3 years ago
Solve for y.<br> 3x + 4y = z<br> -----------------
Georgia [21]

Answer:

y= z-3x/4

Step-by-step explanation:

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3 0
3 years ago
You are working in a primary care office. Flu season is starting. For the sake of public health, it is critical to diagnose peop
Aleksandr-060686 [28]

Answer:

E. 0.11

Step-by-step explanation:

We have these following probabilities:

A 10% probability that a person has the flu.

A 90% probability that a person does not have the flu, just a cold.

If a person has the flu, a 99% probability of having a runny nose.

If a person just has a cold, a 90% probability of having a runny nose.

This can be formulated as the following problem:

What is the probability of B happening, knowing that A has happened.

It can be calculated by the following formula

P = \frac{P(B).P(A/B)}{P(A)}

Where P(B) is the probability of B happening, P(A/B) is the probability of A happening knowing that B happened and P(A) is the probability of A happening.

In this problem, we have that:

What is the probability that a person has the flu, given that she has a runny nose?

P(B) is the probability that a person has the flu. So P(B) = 0.1.

P(A/B) is the probability that a person has a runny nose, given that she has the flu. So P(A/B) = 0.99.

P(A) is the probability that a person has a runny nose. It is 0.99 of 0.1 and 0.90 of 0.90. So

P(A) = 0.99*0.1 + 0.9*0.9 = 0.909

What is the probability that this person has the flu?

P = \frac{P(B).P(A/B)}{P(A)} = \frac{0.1*0.99}{0.909} = 0.1089 = 0.11

The correct answer is:

E. 0.11

5 0
3 years ago
taki has her back to a wall. she starts to walk straight forward. she stops and turns 133° to the right and walks back in this d
Nikitich [7]
I'd like to assume that the triangle is a right triangle and you solve for x so...

133 + c = 180   (supplementary property to find one angle of triangle)
          c = 47

x = 180 - 90 - 47 (int. angles of triangle = 180)
   = 90 - 47
   = 43

Therefore, x is 43 degrees
6 0
3 years ago
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