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
slava [35]
3 years ago
9

Can you help prove this identity?

Mathematics
1 answer:
mario62 [17]3 years ago
3 0
Its six idk really ask your teacher for more help


You might be interested in
Given: △EDN∼△LKI, DQ , KO are altitudes, DN=12, KI=4, DQ=KO+6. Find: QN and OI.
fgiga [73]

Answer:

  • QN = 3√7
  • OI = √7

Step-by-step explanation:

The ratio of corresponding sides DN and KI is 12 : 4 = 3 : 1. The same ratio applies to altitudes DQ and KO. Since the difference between these altitudes is 6 and the difference between their ratio units is 3-1 = 2, each ratio unit must stand for 6/2 = 3 units of linear measure. That is, ...

  DQ = (3 units)·3 = 9 units

  KO = (3 units)·1 = 3 units

Then the base lengths QN and OI can be found from the Pythagorean theorem:

  KI² = KO² +OI²

  4² = 3² +OI²

  OI = √(16 -9)

  OI = √7

  QN = 3·OI = 3√7

8 0
3 years ago
What's the length of QR?
tigry1 [53]

Answer:

using the pithagerum therom

a² + b² = c²

this formula is to find the side of your triangle with 2 sides already known

the answer is A) 17.7

8 0
2 years ago
A jar contains 125 marbles. Given 5% of the marbles are green, 39% of the marbles are blue, and the rest are red, how many red m
scZoUnD [109]

Answer:

70

Step-by-step explanation:

39+5=44

100-44=56

56 percent of  125 is 70

4 0
2 years ago
Solve. x2 – 10x + 21 < 0
Marysya12 [62]

Answer:

(3,7)

Step-by-step explanation:

4 0
3 years ago
What is the answer ?
Ugo [173]
The tip is $15.73. I get that by multiplying 78.63 and .20. then you add the tip to the bill and get $94.36. you then find the discount by multiplying 94.36 and .15. the discount is 14.15. then subtract 14.15 from 94.36 to get your total.

the answer is $80.21
7 0
2 years ago
Other questions:
  • What are the answers?
    10·1 answer
  • Point R(4,-5) is reflected across the y-axis to point S. Point S is reflected across the x-axis to point T. What are the coordin
    13·1 answer
  • I NEED HELP PLEASE !!!
    11·1 answer
  • Plz plz plz this is due today and I really need help
    7·1 answer
  • What are the solutions to he quadratic equation 3x^2+15-18=0
    15·1 answer
  • Slope of points (2,2) and (-2,-2)
    6·1 answer
  • A ball has a radius of 1 foot. <br><br> What is the surface area of the ball?
    14·2 answers
  • Which of the following statements is true about completing a square? A. When completing the square, subtract the square of half
    5·2 answers
  • OMG PLS HELP WITH THIS IM PANICKING OMG I GOT A F IN MATH MY MOM JUST YELLED AT ME IM CRYING PLS HELP WITH THS- PLSS TELL ME I A
    11·1 answer
  • What is the solution for -10 &lt; x - 9? x &lt; -1 x &lt; -19 x &gt; -1 x &gt; -19
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!