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
Mrrafil [7]
2 years ago
12

1. In ABC, m Which expression correctly relates the lengths of the sides of this triangle? (1) ABC BC< CA (3)

AC< BC < AB
(2) ABC AC< BC
(4) BC< AC < AB

Mathematics
1 answer:
wlad13 [49]2 years ago
5 0

Answer:

4 d

Step-by-step explanation:

Given D is mid-point of BC and AD⊥AC

From right angle △DAC

cosC=

a/2

b

=

a

2b

...(i)

also from cosine formulae

cosC=

2ab

a

2

+b

2

−c

2

...(ii)

From (i) and (ii) we get

a

2b

=

2ab

a

2

+b

2

−c

2

⇒4b

2

=a

2

+b

2

−c

2

⇒b

2

=

3

a

2

−c

2

∴cosAcosC=

2bc

b

2

+c

2

−a

2

.

a

2b

=

ca

[(

3

a

2

−c

2

)+c

2

−a

2

]

=

3

2

(

ca

c

2

−a

2

)

You might be interested in
How long will it take light to travel to Earth from the Sun according to the equation?
melomori [17]
Average of eight minutes and twenty seconds to travel from the sun to the earth
8 0
3 years ago
Use the distributive property to rewrite this expression.<br> 3(a + 6)
liq [111]

Answer:

3a + 18

Step-by-step explanation:

6 0
3 years ago
A college conducted a survey of randomly selected freshmen about their choice of major. The table shows the results of the surve
prisoha [69]

Answer:

Step-by-step explanation:

The table is in the book

3 0
3 years ago
Read 2 more answers
Find the domain of the variable 1/5x+1/3x=x/5
cestrela7 [59]

Answer:

x=0 and x=6.

1/5x+1/3x=x/5

15x +25x=15x2

40x=15x2

5x(3x-20)

7 0
3 years ago
CAN someone help with #4 please?
Masja [62]
The constant of proportionality is <em>4 .</em>

The equation is  [ <em>Height = (4) times (Days)</em> ] .

When the sunflower is 60cm tall,                60 = (4) times (Days).

Divide each side of the equation by 4:       <em>15  =  Days</em>
8 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE HELLP Eric plays basketball and volleyball for a total of 95 minutes every day. He plays basketball for 25 minutes longer
    10·1 answer
  • Meg lives in Indianapolis and wants to visit her mom in Lima. She has been meaning to go to a chiropractor in Dayton, so she is
    10·1 answer
  • Name plane P and two more ways
    12·1 answer
  • What is the median of the data set?<br><br> 12, 25, 16, 9, 5, 22, 27, 20
    6·2 answers
  • How do i solve using distributive property ? <br><br> 10 (9-m)
    11·1 answer
  • Can i please get help on 46,66,66, and 74
    5·1 answer
  • Name the intersection of AE and CG
    14·1 answer
  • Who is similar to Giacomo Puccini now in modern-days? And what are their similarities?​
    14·1 answer
  • Can you guys help me pls
    8·2 answers
  • HELP PLEASE<br> Write each number as a logarthm with base 3.<br> 0<br> 1<br> -2<br> 4
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!