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3 years ago

Im confused and i need help please help

Mathematics

1 answer:

denis23 [38]3 years ago

8 0

Answer:

Step-by-step explanation:

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2 1/8 × 1/3 estimate

horsena [70]

2 1/8 × 1/3
= 17/8 × 1/3
= 17/24

4 0

3 years ago

Find the solution set of |2x-3| + 1 = 6.

Tresset [83]

|2x-3| + 1 = 6

1) |2x-3| + 1 (-1) = 6 (-1)

2x-3 = 5

2) 2x-3 (+3) = 5 (+3)

2x = 8

3) 2x(/2) = 8(/2)

x = 4

3 0

3 years ago

Read 2 more answers

Assume a test for a disease has a probability 0.05 of incorrectly identifying an individual as infected (False Positive), and a

Nana76 [90]

Answer:

0.00002 = 0.002% probability of actually having the disease

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Positive test

Event B: Having the disease

Probability of having a positive test:

0.05 of 1 - 0.000001(false positive)

0.99 of 0.000001 positive. So

$P(A) = 0.05*(1 - 0.000001) + 0.99*0.000001 = 0.05000094$

Probability of a positive test and having the disease:

0.99 of 0.000001. So

$P(A \cap B) = 0.99*0.000001 = 9.9 \times 10^{-7}$

What is the probability of actually having the disease

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{9.9 \times 10^{-7}}{0.05000094} = 0.00002$

0.00002 = 0.002% probability of actually having the disease

6 0

3 years ago

Name a point that is √2 away from (-1,5)

Paha777 [63]

All the points on the circle

(x+1)^2 + (y-5)^2 = 2

6 0

3 years ago

4. Find the vertex, focus, and directrix of the parabola. Sketch its graph, showing the focus and the directrix.

valentina_108 [34]

Answer:

vertex - (0,0)

focus - (0, 3/4)

directrix - 3/4

parabola- x^2=-3y

graph of equation:

8 0

2 years ago