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aev [14]
3 years ago
13

Simplify if y<0.

2} }" alt="-\sqrt{9y^{2} }" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
elena55 [62]3 years ago
4 0

Answer:

-3y

Step-by-step explanation:

Whether y is smaller than 0 or not, the square root of y^2 is y, a positive quantity.

Thus, -√(9y²) = -3y

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I'll mark brainiest if right answer
igomit [66]

Answer: x=2  y=18

Step-by-step explanation

3 0
3 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
What is 6ft to 4 yards as a fraction in simplest form
Vesna [10]
1yard =3ft so 》 6ft/4×3ft=6/12=1/2
3 0
4 years ago
7x-9+3x=2x+18-x submit i want an answer please
oksano4ka [1.4K]

Answer:

x = 3

Step-by-step explanation:

7x - 9 + 3x = 2x + 18 - x

10x - 9 = x + 18

10x - x = 18 + 9

9x = 27

x = 3

6 0
3 years ago
Read 2 more answers
PLEASE HELP ME!!!!!!!!
hjlf
The Answer Is 60
2.5 x 8 The Number Of Sides On That Shape Was 8 
2.5 x 8 = 20
20 times the radius 3
20 x 3 = 60
60cm^2

~Hope This Helps :)
Need More Help With Question Just Inbox Me 
Also Rate, Give Thanks, And Mark As Brainiliest. 
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4 0
3 years ago
Read 2 more answers
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