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
larisa86 [58]
2 years ago
10

Could someone please help with this?

Mathematics
1 answer:
saveliy_v [14]2 years ago
5 0

9514 1404 393

Answer:

  5.  88.0°

  6.  13.0°

  7.  52.4°

  8.  117.8°

Step-by-step explanation:

For angle A between sides b and c, the law of cosines formula can be solved to find the angle as ...

  A = arccos((b² +c² -a²)/(2bc))

When calculations are repetitive, I find a spreadsheet useful. It doesn't mind doing the same thing over and over, and it usually makes fewer mistakes.

Here, the side opposite x° is put in column 'a', so angle A is the value of x. The order of the other two sides is irrelevant.

__

<em>Additional comment</em>

The spreadsheet ACOS function returns the angle in radians. The DEGREES function must be used to convert it to degrees. The formula for the first problem is shown here:

  =degrees(ACOS((C3^2+D3^2-B3^2)/(2*C3*D3)))

As you can probably tell from the formula, side 'a' is listed in column B of the spreadsheet.

The spreadsheet rounds the results. This means the angle total is sometimes 179.9 and sometimes 180.1 when we expect the sum of angles to be 180.0.

You might be interested in
The points (k, -8) and (8,0) fall on a line with a slope of 8. What is the value of k?<br> k=
liberstina [14]
K=h bacuse its. dhhhhgggggggdggdgdgddggdbdhejjejehshshsbsbsbs
6 0
2 years ago
Someone just please help me no links no guessing seriously
Doss [256]

Answer:

no I can't u just ruined my mood

8 0
3 years ago
Determine whether the three points are collinear.<br> (0, - 10). (-3,- 13), (2,-8)
LUCKY_DIMON [66]

Answer:

<h2>YES. These points are collinear.</h2>

Step-by-step explanation:

If three points are collinear, then the slopes are the same.

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

For (0, -10) and (-3, -13):

m=\dfrac{-13-(-10)}{-3-0}=\dfrac{-13+10}{-3}=\dfrac{-3}{-3}=1

For (-3, -13) and (2, -8):

m=\dfrac{-8-(-13)}{2-(-3)}=\dfrac{-8+13}{2+3}=\dfrac{5}{5}=1

We can check the last pair (0, -10) and (2, -8):

m=\dfrac{-8-(-10)}{2-0}=\dfrac{-8+10}{2}=\dfrac{2}{2}=1

5 0
3 years ago
Please help ill give brainliest pls dont guess
LiRa [457]
When y=2 and y=5

1. 2y-1 and (3y-5+y or 4y-5)
when y=2 ; 2(2)-1 = 3 and 4(2)-5=3
when y=5 ; 2(5)-1 = 9 and 4(5)-5=15

----nonequivalent-----

2.5y+4 and (7y+4-2y or 5y+4)
so you don't have to place any value in because 5y+4 and 7y+4-2y are equal,
whatever you place any value in, it will be all the same then

-----equivalent------

and no need to find more
7 0
2 years ago
The area of two rectangles is given by he functions: area of a rectangle A:f(x)= 4x2+6x area of rectangle B:g(x)=3x2-x Which fun
dusya [7]

Answer:

x^2+7x if you are asked to find the difference of a function f and function g

Step-by-step explanation:

We are asked to A-B or f(x)-g(x).

(4x^2+6x)-(3x^2-x)

4x^2+6x-3x^2+x

The like terms I'm going to pair up.

4x^2-3x^2+6x+x

1x^2          +7x

x^2            +7x

The answer is x^2+7x

7 0
3 years ago
Read 2 more answers
Other questions:
  • Five oranges were selected at random from a crate of 53 oranges. Their diameters were measured, in millimeters, and then recorde
    10·2 answers
  • Can someone help me?
    6·1 answer
  • When 21 is subtracted from the square of a number, the result is 4 times the number. Find the positive solution.
    5·1 answer
  • New York is required by law to provide shelter to anyone who needs it so that they don’t have to sleep on the street. This isn’t
    11·1 answer
  • How do you solve this system by elimination?
    13·1 answer
  • What is 4(-2)+(-3)(-5)?
    11·2 answers
  • On a quiz harry got 12 out of 15 items correct.what was his quiz score
    8·1 answer
  • You cut grass with a friend for 5 hours and each got paid 8 dollars an hour. On your way home you stopped by a convenient store
    5·1 answer
  • Point P please help i appreciate whoever does (:
    7·1 answer
  • Find the distance between the points (-7,-6)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!