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3 years ago

I cant understand this.

Mathematics

1 answer:

djverab [1.8K]3 years ago

7 0

Multiply the top one by 3 for x, so you can eliminate x and find y

then plug in the y into one of the equations to find x

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A rectangular block of copper metal mass is 1896 g. The dimensions of the points

vagabundo [1.1K]

Answer:

8.921513269...g/cm

Step-by-step explanation:

the density has this formula: D= m/V

so to solve the V, which refers to volume, you do: 8.4×5.5×4.6= 212.52, and the m, which refers to mass, you already have it. So the last thing to do is:

D= 1896g/212.52= 8.921513269...g/cm

I hope I've been helpful... good luck...!!!

8 0

3 years ago

The angle of depression of a point G on a horizontal ground from top T of an electrical pole is 25°. If the distance from G to t

Morgarella [4.7K]

Answer: 21 m

Step-by-step explanation:

Given

the angle of depression of point G is $25^{\circ}$

Distance from pole base to point G is 45 m

Suppose h is the height of the pole

From the figure, we can write

$\Rightarrow \tan 25^{\circ}=\dfrac{h}{45}\\\\\Rightarrow h=45\tan 25^{\circ}\\\Rightarrow h=20.98\approx 21\ m$

8 0

2 years ago

In a certain region, the average movie theater ticket prices in 2009 was $7.70, in 2008 it was $7.36. Find the increase in avera

nordsb [41]

Answer:

The increase price of movie ticket is $ 0.34 or 4.619 %

Step-by-step explanation:

Given as :

The average movie theater price in 2009 = $ 7.70

The average movie theater price in 2008 = $ 7.36

So, let The increase in price from 2008 to 2009 = $ 7.70 - $ 7.36

I.e = $ 0.34

Now in percentage increase

Percentage increase = $\frac{price in 2009 - price in 2008}{price in 2008}$ × 100

Or, Percentage increase = $\frac{$ 7.70 - $ 7.36}{$ 7.36}$ × 100

Or, Percentage increase = $\frac{$ 0.34}{$ 7.36}$ × 100

∴ Percentage increase = 4.619 %

Hence The increase price of movie ticket is $ 0.34 or 4.619 % Answer

8 0

2 years ago

Determine if jk and lm are parallel, perpendicular, or neither j(1,9),k(7,4),l(8,13),m(-2,1)

photoshop1234 [79]

Answer:

"perpendicular"

Step-by-step explanation:

We need to find slope (m) of both line JK and LM

Slope has formula:

$m=\frac{y_2-y_1}{x_2-x_1}$

Lets find slope of JK:

$m=\frac{4-9}{7-1}\\m=-\frac{5}{6}$

Lets find slope of LM:

$m=\frac{y_2-y_1}{x_2-x_1}\\m=\frac{1-13}{-2-8}\\m=\frac{6}{5}$

we know if we multiply two lines' slope and get -1, they are perpendicular. Let's check:

$-\frac{5}{6}*\frac{6}{5}=-1$

Hence, they are perpendicular

4 0

3 years ago

What is the slope of the graph?

katovenus [111]

Answer:

The slope of the graph is 3/4

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers