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3 years ago

HURRY, PLEASE HELP!

Mathematics

2 answers:

Lynna [10]3 years ago

6 0

Answer:

A) y=-3sin(x)

Step-by-step explanation:

lyudmila [28]3 years ago

6 0

Answer:

B) y = –3cos(x) is the answer

Step-by-step explanation:

cuz i said so fam

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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

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

8 0

3 years ago

What is 8/9 of 360 degree ?

andriy [413]

Answer:

320 degrees.

Step-by-step explanation:

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3 years ago

3x+4y=-3 x+2y=-1 how to solve this problem

erma4kov [3.2K]

Answer:

x,y= -1,0

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Can I pls get some help

Natali5045456 [20]

1,905.63 is the correct answer

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2 years ago

The probability that a normal random variable is less than its mean is ____. 1.0 0.5 0.0 Cannot be determined?

Ber [7]

The correct answer for the question that is being presented above is this one: "0.5" The probability that a normal random variable is less than its mean is 0.5. In a normal distribution, 1.0 refers to the one that is stable and is in equilibrium.

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3 years ago