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faust18 [17]
4 years ago
8

Can someone help me please!!!!!!!

Mathematics
1 answer:
Nataly [62]4 years ago
3 0
The anwser is B.Hope this helps! Make sure to give a 5 star rating and a big old THANKS!
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80 volunteers take a meningitis test to help doctors see how accurate this test is at identifying whether someone has meningitis
lubasha [3.4K]

Using it's formula, considering the results, it is found that the accuracy of the test is of 0.95 = 95%.

<h3>What is the accuracy of a test?</h3>

It is given by the <u>number of correct results divided by the number of tests</u>.

In this problem, there were 80 tests, of which 80 - 2 - 2 = 76 had correct results, hence the accuracy is given by:

A = 76/80 = 0.95 = 95%.

More can be learned about the accuracy of a test at brainly.com/question/3128152

#SPJ1

4 0
2 years ago
Does anyone know how to do this? pls help
valkas [14]

Answer:

-3

Step-by-step explanation:

If you reflect over the y-axis and then move 2 units to the left(x-2), then ABCD will be 3 units above EHGF. Since you need to move it down 3 units to map ABCD onto EHGF, you will need to do y-3, which is the same as y+-3

6 0
2 years ago
Read 2 more answers
Consider a single spin of the spinner.
Nitella [24]

Answer:

landing on a shaded portion and landing on an even number ; landing on a shaded portion and landing on a number greater than 3 ; landing on an unshaded portion and landing on an odd number ; and landing on an unshaded portion and landing on a number less than 2.

Explanation:

Mutually exclusive events are events that cannot occur at the same time.  Our spinner has two grey sections, on 1 and 3; and two white sections, on 2 and 4.

This means that the spinner cannot land on a shaded (grey) portion and land on an even number at the same time, since the grey sections are numbered 2 and 4, both of which are even numbers.

The spinner also cannot land on a shaded (grey) portion and land on a number greater than 3 at the same time; this is because the only number greater than 3 on the spinner is 4, which is a white portion.

The spinner cannot land on an unshaded (white) portion and land on an odd number, since the white sections are labeled 2 and 4, which are both even.

The only number on the spinner less than 2 is 1, which is grey; this means the spinner cannot land on a number less than 2 and an unshaded (white) portion at the same time.

5 0
4 years ago
Read 2 more answers
13. Translate the following verbal phrase
Artyom0805 [142]

a) algebraic expression

\frac{3+x}{5}=10

b) Solve and find value of x

x=47

Step-by-step explanation:

We need to translate the following verbal phrase  into an algebraic equation

The quotient of three more than a  number and five is ten

Let the number be x

three more than a  number is written as: 3+x

Since quotient is 10 so,

The algebraic expression will be:

\frac{3+x}{5}=10

Now, <u>solving to find value of x</u>

\frac{3+x}{5}=10

Multiplying both sides by 5

\frac{3+x}{5}*5=10*5\\3+x=50

Now Subtract -3 from both sides

3+x-3=50-3\\x=47

So, value of x=47

Learn More:

  • You can find more info about translating verbal phrase  into an algebraic equation

                    brainly.com/question/1600376

                    brainly.com/question/1617787

  • For finding value of x, more info can be found at:

                     brainly.com/question/1616605

Keywords: verbal phrase, algebraic expression

#learnwithBrainly

8 0
3 years ago
What is 4h-8h simplified
tester [92]

Answer:

it is -4h

step-by-step explanation:

8 0
4 years ago
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