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3 years ago

CREATE AN EXPRESSION & SOLVE.

Mathematics

2 answers:

allsm [11]3 years ago

7 0

Answer:

Step-by-step explanation:

explanation: if you go backwards you divide 24 by 3 getting 8, then you add 4 to that and then you get 12.

Harrizon [31]3 years ago

3 0

Answer:

24/3-4

Answer is 12

Step-by-step explanation:

To find the answer, you have to work backwards. You also have to use PEMDAS. Since she multiplied her answer to get 24, you have to work backwards and divide by 3 first. You will get the number 8 after that because 24/3 is 8. Since she also subtracted 4, you have to work backwards and add 4. That gives you an original number of 12.

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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>

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3 years ago

PLS HELP I HAVE TO SUBMIT THIS SOON

zlopas [31]

Answer:

Step-by-step explanation:

You need to know the formula for the area of a circle , do you?

it's pi* $r^{2}$

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54/2 = 27

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4 0

3 years ago

,please help me solve these 2. problems I am having trouble

Harlamova29_29 [7]

Hi,

1) D

Working :
If the bell rings for 2 weeks straight that means it rings for 14 days.

The bell rings 48 times a day (2 * 24).

The answer is then: 48*14 = 672

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Working:

144 cookies * 8 batches = 864 cookies

864 divided into boxes of 8 = 864 / 8 = 108

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If the temperature in the Arctic is -13C, but it then rises by 20C, what is the new temperature?

miv72 [106K]

Answer:7

Step-by-step explanation:

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3 years ago

What is the main piece of computer software on which every other piece of software relies?

andrew-mc [135]

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