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Sidana [21]
3 years ago
8

A survey asked 40 students if they play an instrument and if they are in band

Mathematics
1 answer:
KIM [24]3 years ago
8 0

Answer:

c

Step-by-step explanation:

25 can play - 5 aren't in the band

15 people don't play an instrument

The total of the two is 40

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See question in image and show workings​<br><br>Note : 1 nautical mile = 1.86km
ycow [4]

Answer:

a)

AB is on the latitude 30°N.

<u>Find AB:</u>

  • AB = 2*3.142*6400*cos 30°*(32+35)/360 = 6482.15 km

BC is along longitude 35°W

<u>Find BC:</u>

  • BC = 2*3.142*6400*(30 + 20)/360 = 5585.77 km

<u>Total distance traveled:</u>

  • 6482.15 + 5585.77 = 12067.92 km

<u>Convert the distance to nautical miles:</u>

12067.92/1.86 = 6488.13 nautical miles

b)

<u>Find the average speed:</u>

  • 6488.13/22 = 294.92 nautical miles / hour

<u>Note</u>. <em>This is unrealistically high speed for a ship, this must be a plane or the time given wrong.</em>

3 0
1 year ago
Please help with 2 Math questions. I dont really understand
lisabon 2012 [21]
For the first problem, the answer is D, because every year, the graph goes down by about $4,500.
For problem two, 
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I'm unsure about b and c but I hope I helped with the others!
3 0
3 years ago
An equation is given below.
docker41 [41]

Answer:

The correct option is  D.Any real number value of x satisfies the equation.

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6 0
3 years ago
Trying to help my bro solve this <br>Y= -2x+2
Alexus [3.1K]
Are you trying to graph it because it is in y=mx+b form.

3 0
3 years ago
Read 2 more answers
What is the value of x in the equation –x = 4 – 3x + 6?
Nataly [62]
Remember you can do anything to an equaiton as long as you do it to both sides


-x=4-3x
add 3x both sides
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2x=4
divide 2
2x/2=4/2
2/2x=2
1x=2
x=2
7 0
3 years ago
Read 2 more answers
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