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CaHeK987 [17]
1 year ago
6

Factor completely.50u^2 - 18

Mathematics
1 answer:
Nutka1998 [239]1 year ago
8 0

Given:

50u^2-18

To factor the given equation completely, we factor out common term 2 first:

2(25u^2-9)

We can also rewrite this into:

2((5u)^2-3^2)

For (5u)^2-3^2, we apply Difference of Two Squares Formula:

x^2-y^2=(x+y)(x-y)

where:

x=5u

y=3

So,

(5u)^2-3^2=(5u+3)(5u-3)

Therefore, the answer is:

2(5u+3)(5u-3)

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A 50 ft flagpole is mounted to the top of a building. If the angle of elevation from a spot on the street to the top of the pole
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Answer:

the height of the building = 91.67161722 feet.

Step-by-step explanation:

Suppose the height of the building (BC) = X feet.

A 50 ft flagpole (AB) is mounted to the top of a building.

So, height of the top of flag above the ground (AC) = (X+50) feet.

If the angle of elevation from a spot (P) on the street to the top of the pole is 58 degrees and the angle of elevation from the same spot (P) to the bottom of the pole is 46 degrees.

It means ∠APC = 58° and ∠BPC = 46°.

Considering Right triangle ΔACP, cot(∠APC) = PC / AC.

PC = AC*cot(∠APC) = (X+50)*cot(58°)

Considering Right triangle ΔBCP, cot(∠BPC) = PC / BC.

PC = BC*cot(∠BPC) = X*cot(46°)

We have PC = PC.

X*cot(46°) = (X+50)*cot(58°)

0.965688774 * X = 0.624869351 * (X+50)

(0.965688774 - 0.624869351) * X = 0.624869351 * 50

0.340819422 * X = 31.2434676

X = 31.2434676 / 0.340819422 = 91.67161722 feet.

Hence, the height of the building = 91.67161722 feet.

6 0
3 years ago
Identify the number that does not belong with the other three. Explain your reasoning. -<img src="https://tex.z-dn.net/?f=%20%5C
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Answer:

The formula for the equation of a circle is (x – h) 2 + (y – k) 2 = r 2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. If a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.

Step-by-step explanation:

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