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4 years ago

Why is the product of two rational numbers always rational?

Mathematics

1 answer:

ludmilkaskok [199]4 years ago

5 0

Answer:

all three blanks are integers

Step-by-step explanation:

Let a/b and c/d represent two rational numbers. This means a, b, c, and d are _integers____, and b and d are not 0. The product of the numbers ac/bd, where bd is not 0. Both ac and bd are integers_____, and bd is not 0. Because ac/bd is the ratio of two integers_____, the product is a rational number.

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3 more and im done HELPPP :(

kotykmax [81]

Answer:

Step-by-step explanation:

$f(5) = \sqrt{5 - 5} + 2$

$f(5) = \sqrt{0} + 2$

$f(5) = 2$

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3 years ago

A medical device company knows that 11% of patients experience injection-site reactions with the current needle. If 4 people rec

Orlov [11]

Answer: 0.6274

Step-by-step explanation:

Given: The proportion of patients experience injection-site reactions with the current needle : p=0.11

Sample size : n= 4

Let x be a binomial random variable that represents the people get an injection-site reaction.

Binomial probability formula: $P(X=x)= ^nC_x p^x(1-p)^{n-x}$

The required probability : P(x=0)

$=\ ^4C_0(0.11)^0(1-0.11)^4\\\\=(1)(1)(0.89)^4\\\\=0.62742241\\\approx0.6274$

Hence, the probability that none of the 4 people get an injection-site reaction = 0.6274

6 0

4 years ago

The formula for the area of a triangle 1/2bh=a. which of the following is not a possible first step to rearrange this formula to

Nataly_w [17]

Hi there!

The answer to this question is A - multiply by 1/2. This is because multiplying by 1/2 does not get rid of the 1/2 on that side, which is what we want to do.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!

7 0

3 years ago

Read 2 more answers

In a packet of 40 skittles,30% are red .How Many are not red?

elena55 [62]

Answer:

28 skittles

Step-by-step explanation:

30% of 40 is 12

subtract 12 from 40 and that is 28

6 0

3 years ago

In a half hour, Sarah is meeting her friends at the lake, 6 miles from her house. At what average speed must

Vladimir79 [104]

Answer:

Divide 6 miles by 0.5 hour: 6/0.5 = 12 miles per hour.

Step-by-step explanation:

4 0

3 years ago