1 year ago

Which of the following is another name for a proof by contradiction?

Mathematics

1 answer:

BARSIC [14]1 year ago

8 0

There are a few possibilities:

Indirect proof
reductio ad absurdum

The second term refers to the idea of simplifying a claim down to an impossible absurd one.

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(3/5)^2 + 4 x 3 - 2 Please help :)

Molodets [167]

Answer:

$10 \frac{9}{25}$

Step-by-step explanation:

$\bigg( \frac{3}{5} \bigg)^{2} + 4 \times 3 - 2 \\ \\ = \frac{9}{25} + 12 - 2 \\ \\ = \frac{9}{25} + 10 \\ \\ = \frac{9 + 10 \times 25}{25} \\ \\ = \frac{9 + 250}{25} \\ \\ = \frac{259}{25} \\ \\ = 10 \frac{9}{25}$

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1 year ago

a data set has a mean of 68 and standard deviation of 6. An element in this set is 51. What is z-score for 51? Round your answer

gogolik [260]

z = -2.83

Explanation:

Given:

Mean, μ = 68

Standard deviation, σ = 6

Data point, x = 51

Z score, z = ?

We know:

$z = \frac{data point - mean}{standard deviation} \\\\z = \frac{x - u}{p}$

Substituting the value we get:

$z = \frac{51-68}{6} \\\\z = -2.83$

A negative z score says that the data point is below average.

4 0

2 years ago

Gail baked some cookies. She sold 2/7 of the cookies on Monday. She sold 1/3 more of the cookies on Tuesday than on Monday. What

Zina [86]

So 2/7 cookies on Monday
n 1/3 more on Tuesday
so we are going to fine Tuesday's amount , to find what fraction did Gail sell on the two days
so
2/7 + 1/3
find lCM which is 21
u add and get 13/21 so 31/21+2/7=19/21

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2 years ago

How many two digit numbers do not contain the digit 9?

cricket20 [7]

87 numbers do not contain the digit 9

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2 years ago

If your family drank 8 pints of apple juice, how many cups would that be? 1

sertanlavr [38]

Answer:

4 cups I believe

Step-by-step explanation:

8 0

2 years ago

Which of the following is another name for a proof by contradiction?​

Which of the following is another name for a proof by contradiction?