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
zysi [14]
3 years ago
7

The perimeter of the isosceles ?ABC with the base BC is equal to 40 cm. Perimeter of the equilateral ?BCD is 45 cm. Find AB and

BC.
Mathematics
1 answer:
Juliette [100K]3 years ago
7 0

Answer: AB = 12.5, BC = 15

<u>Step-by-step explanation:</u>

Perimeter of ΔBCD = BC + CD + BD. Since it is an isoceles triangle, then BC = CD = BD. So, Perimeter of ΔBCD = 3BC

3BC = 45

<u>÷3   </u>    <u>÷3 </u>

 BC = 15

Perimeter of ΔABC = AB + BC + AC.  Since it is an isosceles triangle with BC as the base, then AB = AC. So, Perimeter of ΔABC = 2AB + BC

2AB + BC = 40

2AB + 15 = 40

<u>          -15</u>  <u> -15 </u>

2AB       = 25

<u>÷2         </u>   <u>÷2  </u>

      AB  = 12.5

You might be interested in
At which value in the domain does f(x)=0 ?
lina2011 [118]

f(x)=0

Domain are the set of x values

f(x)=0 , we find all the x values where y =0

At x intercepts y is always 0

so we find all the x intercepts.

x intercepts are the points where the graph crosses x axis

In the graph we can see that the graph crosses x axis at

-2.5 , -0.75 and 1

-2.5 , -0.75 and 1 are the domain where f(x)=0

5 0
3 years ago
Read 2 more answers
Can anyone please help me with my math homework!!!
Lena [83]
Number 8 is 24 hope I help please give me brainiest<span />
7 0
3 years ago
Find the equation of line that passes through the points: A(2,3) and B(4,6)
valentinak56 [21]

Answer:

Step-by-step explanation:

Hello : let  A(2,3)    B(4,6)

the slope is :   (YB - YA)/(XB -XA)

(6-3)/(4-2)  = 3/2

an equation is : y=ax+b     a is a slope

y = (3/2)x +b

 

the line through point  (2,3) :  3 = (3/2)(2)+b    

b = 0

the equation is : y =(3/2)x    

8 0
3 years ago
Question- Solve for a<br> 2a+b=x
kobusy [5.1K]

Answer:

a = (x - b)/2

Step-by-step explanation:

2a + b = x

-b         -b

2a = x - b

/2        /2

a = (x - b)/2

for ex:

x = 3

b = 2

a = ((3) - (2))/2 = 0.5

a = 0.5

2a + b = x

2(0.5) + 2 = 3

4 0
3 years ago
Y+2=2/5(x+6) write in standard form​
icang [17]

y+2=(2/5)(x+6)

5(y+2)=2(x+6)

5y+10=2x+12

-2x+5y+10-12=0

-2x+5y-2=0

2x-5y+2=0

8 0
2 years ago
Other questions:
  • Which part of the cell holds genetic information in the molecule DNA?
    14·2 answers
  • What is 20-8x over-4 simplified
    5·1 answer
  • Find the sum of 67.008 and 3.8
    14·1 answer
  • I need help on question 10 ASAP
    15·1 answer
  • What is the value of the expression? −29−(−1/3÷3/5)
    5·1 answer
  • Mr. Hobbs took out a loan of $12,000 for 4 years at a simple annual
    12·1 answer
  • A circle with a diameter 28m. Find it area and circumference Take[Π=3.4]​
    15·1 answer
  • Find <img src="https://tex.z-dn.net/?f=cos%5E%7B-1%7D%283pi%2F4%29" id="TexFormula1" title="cos^{-1}(3pi/4)" alt="cos^{-1}(3pi/4
    8·1 answer
  • HELP PLEASE SOMEONE !!!!!!!!!!!!!
    7·1 answer
  • According to the National Association of Realtors, it took an average of three weeks to sell a home in 2017. Suppose data for th
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!