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gayaneshka [121]
3 years ago
7

For a given input value rrrr, the function hhhh outputs a value qqqq to satisfy the following equation.

Mathematics
1 answer:
trapecia [35]3 years ago
5 0
65fjeiidhdhdsbisjsisbsbsbs
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Exercise 2.4.2: Proving statements about rational numbers with direct proofs. About Prove each of the following statements using
IgorLugansk [536]

Answer:

See Explanation

Step-by-step explanation:

(a) Proof: Product of two rational numbers

Using direct proofs.

Let the two rational numbers be A and B.

Such that:

A = \frac{1}{2}

B = \frac{2}{3}

The product:

A * B = \frac{1}{2} * \frac{2}{3}

A * B = \frac{1}{1} * \frac{1}{3}

A * B = 1 * \frac{1}{3}

A * B = \frac{1}{3}

Proved, because 1/3 is rational

(b) Proof: Quotient of a rational number and a non-zero rational number

Using direct proofs.

Let the two rational numbers be A and B.

Such that:

A = \frac{1}{2}

B = \frac{2}{3}

The quotient:

A / B = \frac{1}{2} / \frac{2}{3}

Express as product

A / B = \frac{1}{2} / \frac{3}{2}

A / B = \frac{1*3}{2*2}

A / B = \frac{3}{4}

Proved, because 3/4 is rational

(c) x + y is rational (missing from the question)

Using direct proofs.

Let x and y be

Such that:

x = \frac{1}{2}

y = \frac{2}{3}

The sum:

x + y = \frac{1}{2} + \frac{2}{3}

Take LCM

x + y = \frac{3+4}{6}

x + y = \frac{7}{6}

Proved, because 7/6 is rational

<em>The above proof works for all values of A, B, x and y; as long as they are rational values</em>

8 0
3 years ago
A restaurant’s dining room measures 30 ft by 40 ft. If the fire code requires one square meter per guest, what is the seating ca
Mnenie [13.5K]
The restaurant is 30*40= 1200 square feet

1 square meter is 10.76 sq feet

1200/10.76 ~=111.5

Assuming people are integers, the restaurant has a max seating capacity of 111
3 0
3 years ago
Read 2 more answers
Ivan and Tanya share £150 in the ratio 4:1<br> How much more does Ivan get than Tanya
mina [271]

Answer:

Ivan gets £90 more than Tanya

Step-by-step explanation:

Given that

Total amount = £150

Ratio: 4:1

First of all we have to find the sum of ratio: 4+1 = 5

Now,

Ivan's Share:

= \frac{4}{5} * 150\\= 120

Tanya's Share:

=\frac{1}{5} * 150\\= 30

Ivan gets £120 and Tanya gets £30

The difference between their shares is the answer.

So,

= 120-30 = 90

Hence,

Ivan gets £90 more than Tanya

6 0
3 years ago
What is the y-intercept of the exponential function? f(x)=−0.25(6)x+2−1
nadya68 [22]
F(x) is another form of y-intercept
7 0
3 years ago
Read 2 more answers
What comes after 'a thousand trillion' ?
Allushta [10]
One thousand n two trillion
7 0
3 years ago
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