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3 years ago

Explain your reasoning for your answer above. I’ll give brainliest !!

Mathematics

1 answer:

Juliette [100K]3 years ago

5 0

Answer:

Step-by-step explanation:

The triangles are the same. Congruent is when all three sides are equal to each other on both triangles

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Which triangles are similar?

Bumek [7]

A and B because they both have the same angle

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3 years ago

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

There is a bag with only red marbles and blue marbles.

natulia [17]

Answer:

There must be 35 red marbles.

Step-by-step explanation:

This question can be solved using a rule of three.

A probability is the number of desired outcomes divided by the number of total outcomes.

The probability of randomly choosing a red marble is 7/9.

This means that for each set of 9 marbles, 7 must be red.

There are 45 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be.

How many red marbles out of 45?

7 red - 9 marbles

x red - 45 marbles

$9x = 45*7$

Simplifying by 9

$x = 5*7$

$x = 35$

There must be 35 red marbles.

6 0

3 years ago

Will give brainliest to correct answer.

Inga [223]

Use Pythagorean's Theorem to find the length of x. $30^2-16^2=x^2$ so $900-256=x^2$ and $x= \sqrt{644}$ . We can simplify that radicand down into a perfect square times a prime number, and that is $\sqrt{4*161}$ . 4 is a perfect square that can be pulled out as a 2, so the length of x is $2 \sqrt{161}$ , the choice on the top right.

7 0

3 years ago

Read 2 more answers

Determine the absolute value of -11.

AURORKA [14]

The absolute value is how far a number is from zero. The number will always be positive unless there is a negative symbol outside of the brackets. Therefore, your answer is 11.

5 0

4 years ago

Read 2 more answers