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
brilliants [131]
3 years ago
13

∆ABC is a right angled at B and D is a point on BC if AD = 18cm BD = 9cm and CD =4cm Find AC

Mathematics
1 answer:
Gemiola [76]3 years ago
3 0

In triangle, ABD,

AD²= AB²+BD²

AB² = AD²-BD²

AB² = 18²-9² = 324-81 = 243

AB = √243

In triangle, ABC,

AC² = AB²+BC²

AC² = (√243)²+(13)²

AC² = 243+169

AC = √412

AC = 20.29

You might be interested in
After the fraction x plus 1 all over 2 minus the fraction x plus 2 all over 3 x have been combined using the least common denomi
RoseWind [281]

If I've read this correctly, it looks like this.

\dfrac{(x + 1)}{2 - \dfrac{(x + 2)}{3x}}

If that is correct, then the first step is to put the top part of the denominator over 3x

\dfrac{(x + 1)}{\dfrac{6x - (x + 2)}{3x}} = \dfrac{(x + 1)}{\dfrac{5x -2}{3x}}

The next part is to flip a three tier fraction. I'm afraid I have to show what happens. My latex is not that strong.

What you get is

\dfrac{3x*(x + 1)}{(5x - 2)}

This is just about your final answer. You could write it as

\dfrac{3x^2 + 3x}{(5x - 2)}

6 0
3 years ago
2 (t-4) + 1 math I ready
Roman55 [17]

Answer:

2t-7

Step-by-step explanation:

Not sure what you need ;( hope this helps!

6 0
3 years ago
Read 2 more answers
If you know it please tell me it would help a lot
geniusboy [140]
7n \le 21

Divide both sides by 7.

n \le 3

n must be less than or equal to 3. n can be 3 or any number under 3.

For example, n can be 1, 2, 3.
5 0
3 years ago
The office and the living room in a tiny house share a wall. The area of the office is 28 square feet. The area of the living ro
Mandarinka [93]

Answer: The 2 answers are

7・4 + 7・9

and

7(4+9)

Hope this helps!✦

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
∠1
jasenka [17]
Supplementary angles add up to 180 degrees. Using this, we can set up an equation.

Angle 1 + Angle 2=180
124+(2x+4)=180
2x+128=180
2x=52
x=26

The value of x is 26
8 0
3 years ago
Other questions:
  • What is the value of -3|15 - s| + 2s3 when s = -3?
    11·1 answer
  • the alabama river is 729 miles. if 1 mile equals 1.61 kilometers, find the length of the river to the nearest whole kilometer. (
    9·1 answer
  • A company provides a monthly pension to its employees. A person retiring at 62 retires and receives a full monthly pension. If t
    9·1 answer
  • Jamie baked 24 biscuits her sister Mia ate 3 biscuits. and her brother David ate 2 biscuits Which expression can Jamie use to fi
    6·1 answer
  • A school is trying to schedule Prayers of chemistry and algebra two. They find that a total of 386,000 are taking either one or
    8·1 answer
  • M + 7 ≥ 20, if m = 11
    9·1 answer
  • Plz help ASAP the number that is cut off on 69 is 24
    11·1 answer
  • Please help find volume of cone
    9·1 answer
  • Anna's birthday party costs $1, plus an additional $2 for each guest she invites. Write an equation that shows the relationship
    8·1 answer
  • the total attendance at a concert in a theater hall was 1500, of this total 400 were children,850 were women , and the remaining
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!