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3 years ago

Square root of 9 multiplied by square root of 180

Mathematics

2 answers:

grin007 [14]3 years ago

5 0

Square root of 9 is 3 square root of 180 is 13.416roundes 3x13.416 is 40.248

slega [8]3 years ago

3 0

Answer:

18√5

Step-by-step explanation:

√9×√180

from √9 we get 3 cause 3² is 9.

from 180 we get 6√5 because √36×5 is √180.

we took 36 out because it gives us a whole number if we square root it.

So √36×5 is 6√5 , because the square root of 36 is 6

then we multiply 3 and 6√5.

3×6 is 18 so we put 18 and put the √5 behind it.

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What multiplies to -15 and adds to -3

bagirrra123 [75]

That’s not possible but it added to -2 it would be possible

4 0

3 years ago

Geometry . Cosines / sines. Find a and round to the nearest 10th

Lorico [155]

This is the good part of Trigonometry, actually measuring triangles. It's much better than all the identities around sine and cosine and the rest, which actually have more to do with circles than triangles.

This part of trig has a short menu:

Law of Cosines. Three ways to write it, one is $c^2 =a^2+b^2-2ab \cos C$

Law of Sines: $\dfrac{a}{\sin A} = \dfrac{b}{\sin B} = \dfrac{c}{\sin C}$

Triangle angles: $A+B+C=180^\circ$

and two special cases of the Law of Cosines, the Pythagorean Theorem

$C=90^\circ, \quad \quad c^2=a^2+b^2$

and the Collinear Points Theorem:

$C=180^\circ, \quad \quad c^2=a^2+b^2 - 2 a b \cos 180^\circ = a^2+b^2+2ab=(a+b)^2$

$c = a+b$

Here we choose Triangle Angles followed by Law of Sines:

A = 180 - 105 -15 = 60 degrees

$\dfrac{a}{\sin 60^\circ}= \dfrac{2}{\sin 105^\circ}$

$a= \dfrac{2 \sin 60^\circ}{\sin 105^\circ} = 1.793...$

Answer: 1.8 cm

When I was a student we'd be expected to get $\sin 105^\circ$ exactly and get

$a = 3 \sqrt{2} - \sqrt 6$

But that was before online homework.

5 0

3 years ago

(03.02 MC) The figure shows the location of three points around a lake. The length of the lake, BC, is also shown. (The figure i

alexgriva [62]

9514 1404 393

Answer:

(b) 5.66 mi

Step-by-step explanation:

You only need to eliminate the unreasonable answers to make the correct choice.

The hypotenuse of the right triangle is its longest side, so the unknown length must be less than 6. That eliminates the last two choices.

The unknown length cannot be less than the difference of the sides shown, so the unknown length must be more than 4. That eliminates the first choice.

The only reasonable choice is ...

B. 5.66 miles

_____

If you like, you can calculate the distance using the Pythagorean theorem.

AB² + 2² = 6²

AB = √(36 -4) = √32 ≈ 5.66 . . . miles

5 0

3 years ago

A board 2 meters long is cut into 4 pieces of equal length. how long is each piece?

Svetlanka [38]

100 centimeters = 1 meter
2 meters = 200 centimeters
200 centimeters ÷ 4 = 50
there would be 4 equal 50 centimeter broads
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6 0

3 years ago

25 pts

baherus [9]

Answer:

$4.42!

Step-by-step explanation:

Just add all the prices together then divide by 2!

$1.10 * 2 + $3.79 + $0.95 * 3 = $8. 84

$8.84 ÷ 2 = $4.42!

5 0

3 years ago

Read 2 more answers