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3 years ago

What is the square roots of 9

Mathematics

2 answers:

Lyrx [107]3 years ago

5 0

Answer:

(x-3) and (x+3) I think

Step-by-step explanation:

Free_Kalibri [48]3 years ago

4 0

Answer:

the square roots of 9 is 3

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A CD usually sells for $17.00. If the CD is 10% off, and sales tax is 7%, what is the total price of the CD, including tax?

Rus_ich [418]

The cd would $16.37 and thats what it is

8 0

3 years ago

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Find the length of the following curve. If you have a grapher, you may want to graph the curve to see what it looks like.

stepladder [879]

The length of the curve $y = \frac{1}{27}(9x^2 + 6)^\frac 32$ from x = 3 to x = 6 is 192 units

<h3>How to determine the length of the curve?</h3>

The curve is given as:

$y = \frac{1}{27}(9x^2 + 6)^\frac 32$ from x = 3 to x = 6

Start by differentiating the curve function

$y' = \frac 32 * \frac{1}{27}(9x^2 + 6)^\frac 12 * 18x$

Evaluate

$y' = x(9x^2 + 6)^\frac 12$

The length of the curve is calculated using:

$L =\int\limits^a_b {\sqrt{1 + y'^2}} \, dx$

This gives

$L =\int\limits^6_3 {\sqrt{1 + [x(9x^2 + 6)^\frac 12]^2}\ dx$

Expand

$L =\int\limits^6_3 {\sqrt{1 + x^2(9x^2 + 6)}\ dx$

This gives

$L =\int\limits^6_3 {\sqrt{9x^4 + 6x^2 + 1}\ dx$

Express as a perfect square

$L =\int\limits^6_3 {\sqrt{(3x^2 + 1)^2}\ dx$

Evaluate the exponent

$L =\int\limits^6_3 {3x^2 + 1} \ dx$

Differentiate

$L = x^3 + x|\limits^6_3$

Expand

L = (6³ + 6) - (3³ + 3)

Evaluate

L = 192

Hence, the length of the curve is 192 units

Read more about curve lengths at:

brainly.com/question/14015568

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7 0

2 years ago

A piece of string is 120 centimeters long.

zimovet [89]

Answer:

1.2 meters

Step-by-step explanation:

100 centimeters = 1 meter, so... (multiply both sides by 1.2)

120 centimeters = 1.2 meters

6 0

3 years ago

Which one of the following functions is equivalent to sin (-35º)? A. sin 35º B. -sin 35º C. -sin 55º D. sin 55º

sasho [114]

Sin(-x) is equal to - sin(x)

Therefore, sin(-35) = -sin 35

Your answer is B.

3 0

4 years ago

Read 2 more answers

A system of linear equations with more equations than unknowns is sometimes called an overdetermined system. Can such a system b

shepuryov [24]

Answer:

A. Yes, overdetermined systems can be consistent.

As, the system of equations below is consistent because it has a solution

$x_{1}=2$ , $x_{2}=4$ , $x_{1}+x_{2}=6$ .

Step-by-step explanation:

We have,

'Over-determined system is a system of linear equations, in which there are more equations than unknowns'.

For e.g. Let us consider the system,

2x - 3y = 1

3x - 2y = 4

x - y = 1

Plotting these equations, we see from the graph below that,

The only intersection point is (2,1). Thus, x= 2 and y= 1 is the solution of this system.

Thus, over-determined system can be consistent.

According to the options,

Option C is not correct as,

$x_{1}=2$ , $x_{2}=4$ implies $x_{1}+x_{2}=2+4=6\neq 8$ .

Hence, option A is correct.

7 0

3 years ago