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
Novay_Z [31]
3 years ago
9

Show that b=7 Please help i have 10 minutes to answer

Mathematics
1 answer:
777dan777 [17]3 years ago
8 0

Answer:

The value of Cos(60°) is ½

Step-by-step explanation:

B)as we know

b²=a²+c²-2ac.cos(b)

b=√5²+8²-2.5.8×cos(60°)

b=√25+64-80×½

b=√25+64-40

b=√89-40

b=√49

b=7 (proven)

You might be interested in
What is the volume, in cubic meters, if the prism below?
Fiesta28 [93]
<h3>Answer:   1848 cubic meters</h3>

=================================================================

Explanation:

Imagine rotating the figure so that the triangular face is flat on the ground. This makes the triangular faces to be the floor and ceiling of this room.

The floor is a triangle with base 24 meters and height 7 meters. The floor area is base*height/2 = 24*7/2 = 84 square meters.

Multiply this floor area with the height of the room (22 m) to get the volume of the room.

volume = (floor area)*(height) = 84*22 = 1848 cubic meters

6 0
1 year ago
Please answer question below <br> Thanks
slega [8]
5x+17+15=45
5x=45-17-15
5x=13
x=13/5
5 0
3 years ago
4. The balance in Tom's account was
MrRissso [65]

Answer:

His balance is $3778.28

4 0
3 years ago
What expression is equivalent to 3(2t + 6) -4t
tekilochka [14]

Answer: 2t + 18

Step-by-step explanation:

3 0
3 years ago
What is the equation in point−slope form of the line passing through (1, 2) and (2, 5)?
Gwar [14]

Answer:

B

Step-by-step explanation:

First, find the slope by using change in y divided by change in x.

Change in y = 5 - 2 = 3

Change in x = 2 - 1 = 1

This means that the slope is 3/1 = 3.

Then, you put it in the point-slope form so:

(y - 2) = 3(x - 1)

3 0
3 years ago
Other questions:
  • Does anyone know what 12/3(4/5)+4/5=
    8·2 answers
  • What is the mean absolute deviation of the data set? {12, 17, 12, 8, 6} A: 3.2 B: 5.5
    7·2 answers
  • HELP ME PLZ?!!!?!?!?!?!
    10·1 answer
  • How long will it take you to drive 175 miles at a speed of 25 miles per hour?
    14·1 answer
  • Farmer gray has 30 flowerpots. He plants 10 seeds in each pot. How many seeds does he plant?
    6·2 answers
  • PLEASE HELP FAST!!!!
    10·2 answers
  • If a quadratic function has x-intercepts at (-7,0) and 10,0), where would
    10·1 answer
  • HELP PLZ! BRAINLIST WILL BE PICKED!
    5·1 answer
  • Adam,Rob and Clare share some sweets in the ratio 4:5:8. Clare gets 12 more sweets than Rob. How many sweets did Adam get?
    8·1 answer
  • Ms. Kline is baking cookies. She wants to bake cookies for eight friends. Each friend needs to receive at least ten cookies. The
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!