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
Naily [24]
3 years ago
11

Use a special right triangle to write sin 30° as a fraction.

Mathematics
1 answer:
borishaifa [10]3 years ago
6 0

Answer:

1/2

Step-by-step explanation:

So do this, think of an equilateral triangle. A 30-60-90 triangle is just half of an equilateral triangle. If the original side length was x, then the hypotenuse is x, one leg is x/2, and the third, by Pythagorean theorem, is x sqrt3

Sin is opposite over hypotenuse, so we have (x/2)/x = 1/2

You might be interested in
A graph has the equation Y=x/8 what is the constant of proportionality
aev [14]

Answer: 1/8x

Step-by-step explanation:

y= 1/8x

below are the x:y relationships

x:y

4:0.5

8:1

12: 1.5

16:2

20:2.5

24:3

28:3.5

32:4

etc.

7 0
3 years ago
-7(k-8)+2k
Vladimir79 [104]

Step-by-step explanation:

-7(k-8)+2k Use distributive property.

-7k+56+2k Combine like terms.

-5k+56


Mother knows best :)

4 0
3 years ago
Angles C and D are supplementary, if angle C equals 126, what is angle D
Elis [28]

Answer:

angle D = 54°

Step-by-step explanation:

Supplementary angles sum to 180°

To calculate D, subtract angle C from 180

angle D = 180° - 126° = 54°


6 0
3 years ago
the graph shows the speed of a vehicle during the final 50 seconds of a journey at the start of the 50 seconds the speed is k me
Simora [160]

Answer:

a) 27 m/s

b) 30 m/s

c)   i) 3

     ii) Deceleration

Step-by-step explanation:

The question is not complete, the correct question is given as:

The graph shows information about the speed of a vehicle during the final 50 seconds of a journey.  At the start of the 50 seconds the speed is k metres per second.  The distance travelled during the 50 seconds is 1.35 kilometres.

(a) Work out the average speed of the vehicle during the 50 seconds

(b) Work out the value of k.

(c) (i) Calculate the gradient of the graph in the final 10 seconds of the journey

    (ii) Describe what this gradient represents

Answer:

The graph is attached. The total time = 50 seconds, total distance = 1.35 km = 1350 m  

a) The average speed is the ratio of the total distance traveled to the total time taken to cover this distance. The average speed is given by the formula:

Average \ speed=\frac{total\ distance}{total\ time}\\ Substituting: \\ Average \ speed=\frac{1350\ m}{50\ s} = 27\ m/s

b) From the graph, the total distance covered is the area of the graph. The graph is made up of a rectangle and triangle, the area of the graph is equal to the sum of area of rectangle and area of triangle.

Total \ distance=Total\ area=Area\ of \ rectangle+Area\ of \ triangle\\Total \ distance=(length *breadth)+\frac{1}{2}base*height\\1350 \ m=(40*k)+0.5*10*k\\1350=40k+5k\\45k=1350\\k=1350/45\\k=30\ m/sc) i) The gradient in the last 10 seconds is the ratio of change in speed to change in time

Gradient=\frac{change\ in\ speed }{change\ in\ time}=\frac{0-k}{50-40}  \\ bt \ k=30\\Gradient=\frac{0-30}{50-40}= \frac{-30}{10} =-3

ii) Since the gradient is negative it means it is deceleration. That is in the in the last 10 seconds the vehicle decelerates at a rate of 3 m/s²

6 0
3 years ago
Please help I'm timed!!
s2008m [1.1K]

Answer:

I believe i t is 61. Could be wrong though.

Step-by-step explanation:

Angle r plus angle u equals 180. Set the sum of the two equations and solve for x. Then, substitute that number for a and solve.

5 0
2 years ago
Other questions:
  • A company is selecting 4 people to be on a committee. There are 22 employees eligible to be on the committee. What is the total
    13·1 answer
  • 43.If a rectangular solid has a volume of 32 and then each dimension is doubled, what happens to the volume?
    15·2 answers
  • What is the Inverse function of f(x)= x^2 - 49
    5·2 answers
  • Please help i m gonna give brainlest
    10·1 answer
  • He surface area of a piece of paper is 692 cm2. Use the fact that 10 mm = 1 cm to convert this area to mm2. Give your answer as
    12·1 answer
  • Chris labels every lattice point in the coordinate plane with the square of the distance from the point to the origin (a lattice
    14·1 answer
  • Help please :)) Thanksss
    15·1 answer
  • Can y’all help me with this answer choice question plz
    9·2 answers
  • A rectangular prism and its dimensions are shown in the diagram.
    8·1 answer
  • Please help... I'm struggling. lightyears stuff... 10 points view attachment
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!