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3 years ago

What is - 7/8 - 3/8 =

Mathematics

2 answers:

Cloud [144]3 years ago

7 0

The answer to your question is 1/2

kaheart [24]3 years ago

3 0

-4/8 i think that is right not sure tho so you might wanna wait for ohter answer

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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

Please help with these 3

Margaret [11]

I only know number 9
9. 9x+38

7 0

3 years ago

What is a appropriate metric unit for the mass of a television

Artist 52 [7]

The appropriate unit would be pounds/lbs.

7 0

3 years ago

Slope= -1; y-intercept = 8

kotykmax [81]

Answer:

y=-1x+8

Step-by-step explanation:

idk what to do here

4 0

3 years ago

Read 2 more answers

Find the slope of the line that passes through the following points. (-8,-1) (-4,-2)

lana [24]

Answer:

-1/4

Step-by-step explanation:

We can find the slope of a line given two points by using

m = (y2-y1)/(x2-x1)

= (-2- -1)/( -4 - -8)

= (-2+1)/(-4+8)

= -1/4

8 0

3 years ago

Read 2 more answers