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
Mnenie [13.5K]
3 years ago
5

Please help me with part c! Thank you!

Mathematics
1 answer:
Alecsey [184]3 years ago
7 0

Answer:

15√3/14.

Step-by-step explanation:

C.  The longest side x + 2 = 7 is opposite the largest angle 120 degrees. The other 2 sides are of length 3 and 5.

Using the Sine Law:

sin 120 = √3/ 2 = sin A'

7 / sin 120 = 5/ sin B

sin B =  5 sin 120 / 7 =  5√3/14.

7 / sin 120 = 3 / sin C

sin C =  3 sin 120 / 7 =  3√3 / 14

sin A + sin B + sin C =   √3/ 2  +   5√3/14 +  3√3 / 14

=  7√3/ 14  +   5√3/14 +  3√3 / 14

= 15√3/14.

You might be interested in
F(x) = 1/(5x-6)Find the derivative of this function
siniylev [52]

Given

f(x)=\frac{1}{5x-6}

To find the derivative of the give function,we apply below exponent rule first:

\frac{1}{a}=a^{-1}

So,

Next, we apply the chain rule:

So,

We substitute back u=(5x-6):

Simplify:

Therefore, the answer is:

=-\frac{5}{(5x-6)^2}

5 0
1 year ago
Find the volume of the box
Rudik [331]

answer is B. detrjrajaetkterjaejq

6 0
2 years ago
In how many ways can 7 people line if A needs to be first or last and B needs to be in the middle
12345 [234]

Answer:

<em>Assuming person A and person B are part of the 7 people</em>, there are 10 ways the 7 people can line up if A needs to be first or last and B needs to be in the middle.

Step-by-step explanation:

There are 2 places for A (first, last) and 5 places for B (anywhere but first or last). 2 x 5 = 10.

8 0
3 years ago
The area of a cross section through the center of a sphere is 46 square inches. Find the surface area of the sphere.
gavmur [86]

Answer:

184 in.^2

Step-by-step explanation:

The cross section through the center of a sphere is a circle whose radius is equal to the radius of the sphere.

area of circle

A_{circle} = \pi r^2

\pi r^2 = 46

r^2 = \dfrac{46}{\pi}

r = \sqrt{\dfrac{46}{\pi}}

r = 3.83 ~in.

surface area of sphere

SA = 4 \pi r^2

SA = 4 \times \pi \times (3.83)^2

SA = 184~in.^2

7 0
3 years ago
calculate the rate of change <br> -24 ,60) ,( -34, 50<br> please help
VLD [36.1K]

Step-by-step explanation:

the rate of change is the slope of the line connecting both points.

the slope is the ratio y/x indicating how many units y changes, when x changes a certain amount of units when going from one point to another.

so, here

x changes by -10 units (from -24 to -34)

y changes by -10 units (from 60 to 50).

the slope or rate of change is -10/-10 = 1/1 = 1

4 0
2 years ago
Other questions:
  • PLEASE TELL ME IF YOU DO I WILL GIVE YOU THESE POINTS IF YOU DON'T I WILL HUNT YOU DOWN WITH THE MODERATOR Thank you!
    7·2 answers
  • What is 77/200 in decimal form. How to work it out
    7·2 answers
  • How do you identify the angle of rotation including the direction
    13·1 answer
  • Write an equation in slope intercept form for the line that passes through 3,4 and is parallel to y=-2x-2
    13·1 answer
  • Please help me with this question. Algebra 2 is hard!!
    12·1 answer
  • Can someone tell me what’s the answer to this question pls and thank you I will give brainliest
    10·1 answer
  • If f(x) = 6(9)^x then f(1/2) =?
    9·1 answer
  • Jackson's car was making a rumbling noise for 2 weeks. He decided to take it to the mechanic to get it checked out. To diagnose
    9·1 answer
  • PLS HELP 50 POINTS
    11·2 answers
  • Celina built a model of a triangular pyramid. The model's height is shown in the diagram.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!