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2 years ago

3. 9 (3x + 1) - 3(2x + 3) - Simplify the expression

Mathematics

2 answers:

Tanya [424]2 years ago

8 0

Answer:

The answer for this question would be 21x (when simplified).

timurjin [86]2 years ago

3 0

Answer:

9 (3x + 1) - 3(2x + 3)

we have to simplify the given expression

↝ 9(3x+1) - 3(2x+3)

↝ (27x+9) - (6x+9)

↝ 27x + 9 - 6x - 9

↝ 27x - 6x + 9 - 9

↝ 21x

So, the required answer is 21x .

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From the top of a lighthouse 280 feet tall, to keep her spot a ship in distress at an angle of depression of 18°. How far is the

solong [7]

Given:

Height of the lighthouse = 280 feet

The angle of depression from the top of the lighthouse to a ship = 18°.

To find:

The distance between boat and shore.

Solution:

Draw a diagram by using the given information.

In a right angle triangle,

$\tan \theta=\dfrac{Perpendicular}{Base}$

In triangle ABC,

$\tan C=\dfrac{AB}{BC}$

$\tan 18^\circ=\dfrac{280}{BC}$

$BC=\dfrac{280}{\tan 18^\circ}$

Using a calculator, we get

$BC=\dfrac{280}{0.3249}$

$BC=861.80363...$

$BC\approx 862$

Therefore, the boat is 862 feet away from shore.

4 0

3 years ago

Help with # 4 plz idk

EleoNora [17]

It would be G. about 15 miles

6 0

3 years ago

Please help I forgot how to do this

iren2701 [21]

Answer:

56.

Step-by-step explanation:

Formula for solving a triangle is 1/2 * base * height.

3 0

3 years ago

Simplify (4x-8)/(-3x)*(12)/(12-6x)

zloy xaker [14]

$\dfrac{4x-8}{-3x}\cdot\dfrac{12}{12-6x}=\dfrac{4(x-2)}{-x}\cdot\dfrac{4}{-6(x-2)}=\dfrac{4}{-x}\cdot\dfrac{4}{-6}\\\\=\dfrac{2}{-x}\cdot\dfrac{4}{-3}=\dfrac{(2)(4)}{(-x)(-3)}=\dfrac{8}{3x}$

7 0

3 years ago

Good at math, help please!!!!!!

solmaris [256]

C is tevanswer out I think so

6 0

3 years ago

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