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Scilla [17]
2 years ago
9

4(x−2+y) It's for khan academy

Mathematics
1 answer:
inessss [21]2 years ago
4 0
The answer is 4x-8+4y i think?
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A statue is mounted on top of a 21 foot hill. From the base of the hill to where you are standing is 57feet and the statue subte
AleksandrR [38]

Please find the attached diagram for a better understanding of the question.

As we can see from the diagram,

RQ = 21 feet = height of the hill

PQ = 57 feet = Distance between you and the base of the hill

SR= h=height of the statue

\angle SPR=Angle subtended by the statue to where you are standing.

\angle x=\angle RPQ= which is unknown.

Let us begin solving now. The first step is to find the angle \angle x which can be found by using the following trigonometric ratio in \Delta PQR :

tan(x)=\frac{RQ}{PQ} =\frac{21}{57}

Which gives \angle x to be:

\angle x=tan^{-1}(\frac{21}{57})\approx20.22^{0}

Now, we know that\angle x and \angle SPR can be added to give us the complete angle \angle SPQ in the right triangle \Delta SPQ.

We can again use the tan trigonometric ratio in \Delta SPQ to solve for the height of the statue, h.

This can be done as:

tan(\angle SPQ)=\frac{SQ}{PQ}

tan(7.1^0+20.22^0)=\frac{SR+RQ}{PQ}

tan(27.32^0)=\frac{h+21}{57}

\therefore h+21=57tan(27.32^0)

h\approx8.45 ft

Thus, the height of the statue is approximately, 8.45 feet.

3 0
3 years ago
Terry has 15 candles. She needs at least 100 candles. The candles she wants are sold in boxes of 8. What is the least number of
enyata [817]

Answer:

Answer: 11

Step-by-step explanation:

1. 100-15=85

2. 85/8=10.625

3. 10.625 rounds up to 11

6 0
3 years ago
Read 2 more answers
Find the diameter of Oo. A line that appears to be tangent is tangent. If your answer is not a whole
Trava [24]

Answer:

Diameter = 9

Step-by-step explanation:

Let the diameter be represented as x.

Based on the secant-tangent theorem, the following equation representing the relationship between the segments would be:

(16 + x)(16) = 20²

256 + 16x = 400

Subtract 256 from each side

16x = 400 - 256

16x = 144

Divide both sides by 16

x = 144/16

x = 9

Diameter = 9

8 0
3 years ago
18.88 divided by 1.6
dybincka [34]
18.88 divided by 1.6 is 11.8.
3 0
3 years ago
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(I NEED IT NOWWWWW HURRYYYY)You have half of your pens in your backpack. You give half of these to your friend, Alex. What fract
Margarita [4]

Answer:

1/4 of ur pens

Step-by-step explanation:

8 0
3 years ago
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