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
Ivenika [448]
3 years ago
15

Find the Value of the letter in the following questions. Give your answers to 3 s.f.

Mathematics
1 answer:
Elis [28]3 years ago
4 0

Answer:

i = 75.7°

h = 48.2°

Step-by-step explanation:

==>To find i, use the sine rule for finding angles: sin(A)/a = sin(B)/b

Where,

a = 7.2cm

sin(A) = i

b = 6.5cm

sin(B) = sin(61) = 0.8746

Thus:

sin(A)/7.2 = 0.8746/6.5

Multiply both sides by 7.2

sin(A) = (0.8746*7.2)/6.5

sin(A) = 0.969 (3 s.f)

A = i° = sin^-1(0.969) = 75.7 (3 s.f)

==>To find h, use the Cosine rule for angles:

Cos(C) = (a²+b²-c²)/2ab

cos(C) = h°, a = 4, b = 4.5, c = 3.5

a² = 16

b² = 20.25

c² = 12.25

cos(C) = (16+20.25-12.25)/(2*4*4.5)

cos(C) = 24/36

cos(C) = 0.667 (3 s.f)

C = h° = cos^-1(0.667) = 48.2° (3 s.f)

You might be interested in
A horse can run 1 3/8 of a mie in 1 3/5 minute. how long does it take the horse to run 1 mile
mario62 [17]

A horse can run 1 3/8 of a mile in 1 3/5 minute. How long does it take the horse to run 1 mile?

So what i would personally do first is convert the fractions into decimals.

1 3/8= 11/8= 1.375    of a mile  

1 3/5= 8/5 =1.6         of a minute

Now we find the rate of change

I

8 0
3 years ago
Printing a newsletter cost $1.50 per copy plus $450 in printers fee. The copies are sold for $3 each. How many copies of the new
e-lub [12.9K]
1.50x + 450 = 3x
450 = 3x - 1.50x
450 = 1.50x
450/1.50 = x
300 = x

300 copies must be sold to break even
6 0
3 years ago
Read 2 more answers
Which equation describes the graph?<br><br> Y=-|x+2|<br> Y=-|x|+2<br> Y=-|x-2|<br> Y=-|x|-2
Lera25 [3.4K]

Answer:

y = -|x|+2

Step-by-step explanation:

The graph represents y = |x| where the given graph opens upside down so it's negative and +2 translation towards the top

Answered by GAUTHMATH

5 0
2 years ago
Help please Algebra 2 B
bonufazy [111]
A1 = 2/5, an = an-1 * 5

8 0
3 years ago
What is the solution of x-7= ir+14,
weqwewe [10]

Answer:

x=12

Step-by-step explanation:

put the x at one side and the numbers ar the other

5/2x-3/4x=14+7

10/4x-3/4x=21

7/4x=21

7x=84

x=12

3 0
3 years ago
Other questions:
  • Three teaspoons equals 1 tablespoon. A pumpkin bread recipe calls for 1 teaspoons of cinnamon, 1 teaspoon of nutmeg, 1 teaspoon
    7·1 answer
  • 1234567891011121314151617181920
    7·2 answers
  • Can someone help me with 21
    5·1 answer
  • A barrel contained 60 gallons of water. Water leaked out of the barrel at a rate of 5 gallons every 3 days. how may day would it
    13·2 answers
  • What does BC equal ?
    15·1 answer
  • Which table of values can be defined by the function y = -2x + 5? X у -1 - 2 -1 --3 o -5 -7 1 2. -9 X V у --10-25 -5 -15 0 -5 5
    5·1 answer
  • 48 times 10to the 4th
    7·2 answers
  • Please helpp I will mark brainliest!!&lt;3
    5·2 answers
  • Helpppppppppppp WILL MARK BRAINLIST
    15·1 answer
  • Im confused..help.............
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!