Answer:
Ques 11: 123.08 meters.
Ques 12: 269.4 meters.
Ques 13: 211.27 meters.
Step-by-step explanation:
Ques 11: We have that the angle of elevation from the ship to the top of the lighthouse is 18° and the height of the lighthouse is 40 m.
It is required to find the distance of the ship from the shore, say 'x' m.
As, we have, 
⇒ 
⇒ 
⇒ 
⇒ x = 123.08 m.
Thus, the distance of the ship from the shore is 123.08 meters.
Ques 12: We have, length of the kite is 300 m and the angle made by the string is 64°.
It is required to find the height of the kite, say 'x' m.
As, we have, 
⇒ 
⇒ 
⇒ 
⇒ x = 269.4 m.
Hence, the height of the kite is 269.4 meters.
Ques 13: We have, the wreckage is found at the angle of 12° and the diver is lowered down by 45 meters.
It is required to find the distance covered by the diver to reach the wreckage, say 'x' m.
As, we have, 
⇒ 
⇒ 
⇒ 
⇒ x = 211.27 m.
Thus, the distance covered by the diver to reach the wreckage is 211.27 meters.
What are the choices, or do you have to give the answer?
9,250 is the answer i believe
No.
This is almost a perfect square trinomial, but it is not.
We can verify this by looking at the first two terms.
With only x^2 + 20x, we could complete the square to make this a perfect square trinomial by performing the following steps:
<em><u>Divide the middle term by 2.</u></em>
20 / 2 = 10
<em><u>Square the quotient. </u></em>
10^2 = 100.
<em><u>Add 100 to both sides.</u></em>
x^2 + 20x + 100 = 100
As the provided trinomial is x^2 + 20x - 100, it is not a perfect square trinomial.
Answer: y is less than or equal to +5x/2 +5. You can use desmos for confirmation. Its your best friend for graphing
Step-by-step explanation: