The first one can be done by Pythagoras theorem such as

then

then

The second one can also done by Pythagoras theorem, note that this is isosceles triangle so

, again by using Pythagoras theorem

then

then

For the last one can also done by property of 30-60-90 triangle.

Answer:
59
Step-by-step explanation:
F = 1.8c + 32
F = 1.8(15) + 32
F = 27+32
F = 59
Considering the situation described, the classification of the elections is given as follows:
- David came in first place.
- Greg came in second place.
- Victor came in third place.
- Mac came in fourth place.
- Bill came in fifth place.
<h3>How to find the classification of the elections?</h3>
We take the situation that is described, and build the classification from it. The classification has the following format:
P1 - P2 - P3 - P4 - P5
With P1 being the first placed candidate, P2 being the second placed candidate, and so on until P5 which is the fifth placed candidate.
From the text given in this problem, we have that:
- Victor finished in third place, and David beat him, hence P3 = Victor, David = P1 or P2.
- Greg didn't come in first nor in last, hence, considering that Victor is P3, Greg = P2 or P4.
- Mac didn't win, but he finished higher than Bill, hence, considering that Mac didn't win and that Victor is P3, Mac = P4, Bill = P5.
- From the bullet points above, we can conclude that David = P1, Greg = P2.
Hence the places of each candidate are given as follows:
- David came in first place.
- Greg came in second place.
- Victor came in third place.
- Mac came in fourth place.
- Bill came in fifth place.
A similar problem, in which a situation is interpreted, is given at brainly.com/question/5660603
#SPJ1
Plug in 3a for x,
2(3a)^2 is 18a^2, then add five
Answer: 18a^2 +5