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3 years ago

Expand and simplify completely (z+6)(z+6) (x+5)(x+5)

Mathematics

1 answer:

tino4ka555 [31]3 years ago

3 0

Answer:

(z+6)(z+6): z ^ 2 + 12z + 36

(x+5)(x+5): x ^ 2 + 10x + 25

Step-by-step explanation:

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From a point A that is 8.20 m above level ground, the angle of elevation of the top of a building s 31 deg 20 min and the angle

Mariulka [41]

Answer:

30.11 meters ( approx )

Step-by-step explanation:

Let x be the distance of a point P ( lies on the building ) from the top of the building such that AP is perpendicular to the building and y be the distance of the building from point A, ( shown in the below diagram )

Given,

Point A is 8.20 m above level ground,

So, the height of the building = ( x + 8.20 ) meters,

Now, 1 degree = 60 minutes,

⇒ $1\text{ minute } =\frac{1}{60}\text{ degree }$

$20\text{ minutes }=\frac{20}{60}=\frac{1}{3}\text{ degree}$

$50\text{ minutes }=\frac{50}{60}=\frac{5}{6}\text{ degree}$

By the below diagram,

$tan ( 12^{\circ} 50') = \frac{8.20}{y}$

$tan(12+\frac{5}{6})^{\circ}=\frac{8.20}{y}$

$tan (\frac{77}{6})^{\circ}=\frac{8.20}{y}$

$\implies y=\frac{8.20}{tan (\frac{77}{6})^{\circ}}$

Now, again by the below diagram,

$tan (31^{\circ}20')=\frac{x}{y}$

$tan(31+\frac{1}{3})=\frac{x}{y}$

$\implies x=y\times tan(\frac{94}{3})=\frac{8.20}{tan (\frac{77}{6})^{\circ}}\times tan(\frac{94}{3})^{\circ}=21.9142943216\approx 21.91$

Hence, the height of the building = x + 8.20 = 30.11 meters (approx)

8 0

3 years ago

Which choice is equivalent shown here x less than 0?

Usimov [2.4K]

Which choice is equivalent shown here x less than 0?

ANSWER:

EXPLANATION:

I hope its help

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3 years ago

Find the percent change from 48 to 228. Tell whether it is a percent increase or decrease. If necessary, round your answer to th

KIM [24]

228 - 48 = 180

180/48 = 3.75

Its increase 375%

7 0

3 years ago

$33 dollars what integer is equivalent <br> to this

defon

Answer:

I hope this helps!

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4 years ago

Which of the following is an example of

Nikitich [7]

Answer:

3x-3

Step-by-step explanation:

There is a variable (x) in this expression.

hope this helps :)

3 0

3 years ago

Read 2 more answers