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3 years ago

Pls solve this question ASAP!!!

Mathematics

1 answer:

My name is Ann [436]3 years ago

8 0

Step-by-step explanation:

$\frac{1}{x} - \frac{1}{x - 2} = 3$

× All by x(x-2) both sides of equation

(x-2)-x = 3x(x-2)

x-2-x = 3x² - 6x

-2 = 3x² - 6x

0 = 3x² - 6x +2

3x² - 6x + 2 = 0

and use the formula

$x = \frac{ - b + - \sqrt{ {b}^{2} - 4ac } }{2a}$

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To determine the height of a pine tree, you measure the shadow cast by the tree and find it to be 20 feet long. Then you measure

Otrada [13]

Answer:

Height of the pine tree = 60 in.

Step-by-step explanation:

Since, triangle formed by the tip of the tree and tip of the shadow of the tree will be similar to each other,

By the property of similarity, corresponding sides of the similar triangles will be proportional.

$\frac{x}{20}=\frac{36}{d}$

If d = 12 inches,

$\frac{x}{20}=\frac{36}{12}$

x = $\frac{20\times 36}{12}$

x = 60 in.

Therefore, height of the pine tree will be 60 in.

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3 years ago

17. A moving truck fills up a shipment at an old

Orlov [11]

Answer:

(4,-6)

Step-by-step explanation:

The y axis is the North and South direction, or up and down on the graph. Starting at point (-2,1), where y = 1, to move up add, or to move south subtract. To move 7 blocks south 1 - 7 = -6

The x axis is East and West or to the right or left respectively. To move East / right add, to move West / left subtract. In the point (-2,1) x = - 2 so to move 6 blocks east add. -2 + 6 = 4

Put the coordinates together (4,-6)

5 0

3 years ago

A two Way frequency table is shown below displaying the relationship between pizza type and crust choices for pizza. we took a s

makvit [3.9K]

There are 40 total Hawaiian Pizzas and 2 are thin crust.

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8 0

3 years ago

Can somebody plz help?e

yawa3891 [41]

Answer:

21.4

Step-by-step explanation:

We can solve for x using trigonometry

Here are the <u>Trigonometric Ratios</u>

Remember SOH CAH TOA

Sine = Opposite over Hypotenuse (SOH)

Cosine = Adjacent over Hypotenuse

Tangent = Opposite over Adjacent

We are given the measure of ∠T ( 72° )

We are also given the adjacent side length (6.6) ( Adjacent = the side length that is not the hypotenuse nor the opposite side length )

And we need to find the hypotenuse ( longest side length )

We this information we can use the trigonometric ratio Cosine to solve for x

That being said we want to set up an equation

(remember cosine = adjacent over hypotenuse )

$cos(72)=\frac{6.6}{x}$

Now we solve for x

We can't get rid of the 6.6 itself so we want to multiply each side by x

now we have $xcos(72)=6.6$

Step 2 divide each side by cos(72)

$\frac{xcos(72)}{cos(72)} =x\\\frac{6.6}{cos(72)} \\x=\frac{6.6}{cos(72)}\\cos(72)=0.3090169944\\\frac{6.6}{0.3090169944} =21.35804865\\$

We're left with x = 21.35804865

Finally we want to round to the nearest tenth of a foot and we get that x = 21.4

7 0

3 years ago

Find the product.<br><br> (−x−3)(2x2+5x+8)=

harina [27]

$( - x - 3)(2 {x}^{2} + 5x + 8) = \\ = - 2 {x}^{3} - 5 {x}^{2} - 8x - 6 {x}^{2} - 15x - 24 = \\ = - 2 {x}^{3} - 11 {x}^{2} - 23x - 24$

3 0

4 years ago