All categories

2 years ago

True or false if false give a counter example the product of odd numbers is always odd

Mathematics

2 answers:

Ilia_Sergeevich [38]2 years ago

7 0

Answer:

TRUE

Step-by-step explanation:

EXAMPLE : 3×5=15

27×5= 135

Dima020 [189]2 years ago

7 0

Answer:

<h3> True</h3><h3>fo example: 3•3 = 9 (=2•4+1)</h3><h3> 5•7 = 35 (=2•17+1)</h3><h3> 11•13 = 143 (=2•71+1) </h3>

Step-by-step explanation:

If k is any integer then 2k is even number and 2k+1 is odd number

If n is any other integer then 2n+1 is also some odd number

Their product:

(2k + 1)(2n + 1) = 2k•2n + 2•1k + 1•2n + 1•1 = 2(2kn + k + n) + 1

k,n are integers so 2kn also is integer.

Sum of integers is integer too, so if we name 2kn+k+n = z, then product of any two odd integers is 2z+1 which is an odd number.

You might be interested in

Write a paragraph comparing the two classes' semester grades. Be sure to compare the extremes, the quartiles, the medians, and t

Gnom [1K]

Answer:

Second class have higher marks and greater spread.

Step-by-step explanation:

First box plot represents class first. From the first box plot, we get

$\text{Minimum value }= 53,Q_1=62,Median=80,Q_3=86,\text{Maximum value }= 89$

$Range=Maximum-Minimum=89-53=36$

$IQR=Q_3-Q-1=86-62=24$

Second box plot represents class second. From the second box plot, we get

$\text{Minimum value }= 56,Q_1=62,Median=74,Q_3=89,\text{Maximum value }= 96$

$Range=Maximum-Minimum=96-56=40$

$IQR=Q_3-Q-1=89-62=27$

First class has greater minimum value, first quartile of both classes are same, second class has greater median, first class has greater third quartile and first class has greater maximum value. It means second class have higher marks but class first have less variation.

Second class has greater range and greater inter quartile range. It means data of second class has greater spread.

Therefore, second class have higher marks and greater spread.

3 0

2 years ago

Porter's Diner sold 48 milkshakes last week. 50% of the milkshakes had whipped cream on top. How many milkshakes with whipped cr

barxatty [35]

50% =0.5
0.5 times 48= 24

3 0

2 years ago

Read 2 more answers

PLZ HELP BRAINLIEST THANKS AND 20 POINTS ADDED

schepotkina [342]

Circumference=diameter times pi
diameter=12
circumference=12 times pi
we use pi=3.14
circumfernce=12 times 3.14
circumference=37.68 ft
round to tenth
8 is greater than 5 so roundup
37.7ft

3 0

2 years ago

Read 2 more answers

Suppose a researcher is testing someone to see if he or she can tell Soda X from Soda Y, and the researcher is using 28 trials

AlladinOne [14]

Answer:

The probability that a person will get 17 or more right, if the person is truly guessing, is about 12.9%.

The p-value is the probability of obtaining the observed results of a test, assuming that the null hypothesis is correct.

Step-by-step explanation:

The system of hypothesis fo this case are:

Null hypothesis: $p\leq 0.5$

Alternative hypothesis: $p >0.5$

That's a upper right tailed test.

The p-value is the probability of obtaining the observed results of a test, assuming that the null hypothesis is correct.

And this value allows to reject or not the null hypothesis.

If $p_v$ we reject the null hypotheis at the significance level. That indicates strong evidence against the null hypothesis, so you reject the null hypothesis.

If $p_v>\alpha$ then we say that we fail to reject the null hypothesis at the significance level. That indicates weak evidence against the null hypothesis, so you fail to reject the null hypothesis.

5 0

2 years ago

(NOT A MULTIPLE CHOICE)

Vsevolod [243]

9514 1404 393

Answer:

a, b, c --- all <em>not</em> representative

Step-by-step explanation:

The question posed by the engineer is "are residents of the city in favor of ...".

The only representative sample is one from a pool that includes <em>all residents of the city</em>—not just those who (a) use the road, (b) live along the road, or (c) own homes.

<em>Additional comment</em>

The engineer may want to refine the question. As posed, it would include children, homeless, and/or institutionalized residents of the city as well as drivers and tax-payers. In inclusive cultural traditions, "residents of the city" may also include animals, plants, water, air, and other holders of spiritual energy.

8 0

2 years ago