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3 years ago

Twice a number, minus 13

Mathematics

2 answers:

zalisa [80]3 years ago

5 0

DANG IM SO CONFUZED ON THIS XD IM TRYING TO DO IT awnser is down dere too

torisob [31]3 years ago

3 0

Twice a number, minus 13
Answer: 2n - 13

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Robyn bought 2 yards of cotton fabric and yards of fleece fabric. How many yards of fabric did Robyn buy?

Vinil7 [7]

Here, Cotton fabric = 2 yards
yards of fleece fabric = 2 1/2 yards

Total fabric = 2 + 2 1/2 = 4 1/2

In short, Your Answer would be: Option C

Hope this helps!

3 0

2 years ago

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

Which expression is equivalent to 6 minus (negative 8)?

Masteriza [31]

Answer:

6 - (-8)

is 6 + 8

Step-by-step explanation:

8 0

3 years ago

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Which of the following quantities are continuous?

Oxana [17]

Answer:

A. only II

Step-by-step explanation:

Mathematics calculus differentiates things into discrete and continuous. Discrete things have indivisible units, the example will be how many dogs in a village. There is no half dog, it's either one, two, etc. But the distance covered by train can be written as half miles, it's divisible unit.

The number of books and bracelets also discrete, thus the answer is A.

4 0

3 years ago

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.........................................

xeze [42]

Answer:

yes

Step-by-step explanation:

7 0

2 years ago

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