1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
fgiga [73]
3 years ago
8

Pre-Cal Help!! (Image Attached)

Mathematics
1 answer:
-Dominant- [34]3 years ago
7 0
Note that 165 deg can be split up into 2 angles:  120 and 45 degrees.
We know (or should know) the sine and cosine values of each of these.

sin (x+y) = sin x cos y + cos x sin y

Here,

sin (165) = sin 120 cos 45 + cos 120 sin 45, or
sin (165) =   sqrt(3)/2 * 1/sqrt(2) + 1/2 * 1/sqrt(2)

Finish this work; it will give you the correct answer.
You might be interested in
Help me solve this problems please
Ilia_Sergeevich [38]

Answer:

a) 2.5 km

b) 1836 m ≈ 1.8 km (rounded)

Step-by-step explanation:

a) just add the two distances of the vertical and horizontal road. 900m + 1600m = 2500m = 2.5 km

b) Apply Pythagoras (a²+b²=c², where a and b are the vertical and horizontal roads, and c is the diagonal road).

c = √(1600²+900²) ≈ 1836m (rounded)

4 0
3 years ago
4x+y=210 and 3x+2y=195
meriva
Subsitution

4x+y=210
minus 4x both sides
y=210-4x
sub 210-4x for y in other equation

3x+2(210-4x)=195
3x+420-8x=195
-5x+420=195
minus 420 both sides
-5x=-225
divide both sides by -5
x=45

sub back

y=210-4x
y=210-4(45)
y=210-180
y=30

x=45
y=30
(x,y)
(45,30)
7 0
3 years ago
Read 2 more answers
C. The gardener wants to cover and area of 108 square feet. The height of the garden is 12
Lisa [10]

Answer:A

Step-by-step explanation: You divide 108 by 12

7 0
4 years ago
the circular stone mound in Ireland called Newgrange has a diameter of 250 feet. A passage 62 feet long leads toward the center
wolverine [178]
The complete question in the attached figure

we know that
If two chords intersect in the interior of a circle, then the product of the lengths of the segments of one chord is equal to the product of the lengths of the segments of the other chord (Segments of Chords Theorem)

therefore

AB*BC=DB*BE
AB=x
BC=x
DB=62
BE=250-62---------> BE=188 ft

so
x*x=62*188----------> x²=11656--------> x=√11656--------> x=107.96 ft

the answer is x=107.96 ft

4 0
4 years ago
A closed cylindrical tank has a height of 200 cm and a diameter of 126 cm
olasank [31]

Area of the sheet used to make the tank = total surface area of the cylinder = 2\pir(r+h) = 2 x 22/7 x 63 x 263 = 104148 sq. cm.

4 0
4 years ago
Read 2 more answers
Other questions:
  • I don’t get how to do the mean and median or mode
    9·2 answers
  • Circle 1 is center at (-4,5) and has a radius of 2 centimeters. Circle 2 is centered at (2,1) and has a radius of 6 centimeters.
    12·1 answer
  • Michael bought a box of 20 pretzel rods for $4.40. what is the price per pretzel rod?
    8·1 answer
  • Which is the better deal
    14·1 answer
  • Plz help me with this
    6·1 answer
  • For each hour he babysits, Anderson earns $1 more than half of Carey’s hourly rate. Anderson earns $6 per hour. Which equation c
    5·2 answers
  • Which large group of polygons do all of these shapes belong
    7·1 answer
  • Please help its in this picture
    7·1 answer
  • A varsity boy's basketball team has ratio of seniors to juniors that is 7:4. The varsity girl's basketball team has a ratio of s
    7·1 answer
  • Which of the following terms best describes a vertical line that the graph of a
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!