cidaliaaa
cidaliaaa
16-08-2014
Mathematics
Answered
really dont know what to do ..
Answer :
konrad509
konrad509
16-08-2014
[tex](x+9)^2=(x+1)^2+(x+5)^2\\ x^2+18x+81=x^2+2x+1+x^2+10x+25\\ x^2-6x-55=0\\ x^2+5x-11x-55=0\\ x(x+5)-11(x+5)=0\\ (x-11)(x+5)=0\\ x=11 \vee x=-5\\\\ |AC|=x+9=11+9=20[/tex]
Answer Link
Аноним
Аноним
16-08-2014
[tex]This\ question\ is\ illogical.\\\\If\ \Delta ABC\simeq\Delta DE F\ and\\\Delta ABC\ and\ \Delta DE F\ are\ rectangular\ triangle,\ then:\\\\\frac{|AB|}{|BC|}=\frac{|DE|}{|EF|}\\\\If\ m\angle D=60^o\ then\ m\angle A=60^o.\\The\ triangle\ 30^o;60^o;90^o\ has\ the\ relation\ between\ the\ sides\\(look\ at\ the\ picture).[/tex]
[tex]\frac{|DE|\sqrt3}{2}=12\ \ \ \ \ |multiply\ both\ sides\ by\ 2\\|DE|\sqrt3=24\ \ \ \ |multiply\ both\ sides\ by\ \sqrt3\\3|DE|=24\sqrt3\ \ \ \ |divide\ both\ sides\ by\ 3\\|DE|=8\sqrt3\Rightarrow|DF|=2\times8\sqrt3=16\sqrt3\\\\\Delta ABC:\\x+9=2(x+1)\\x+9=2x+2\\x-2x=2-9\\-x=-7\\\boxed{x=7}\\\\|AC|=x+9=7+9=\fbox{16};\\|AB|=x+1=7+1=\fbox8;\\|BC|=x+5=7+5=\fbox{12}\\\\Angles\ of\ \Delta ABC:30^o;\ 60^o;\ 90^o,\ then:[/tex]
[tex]|BC|=\frac{|AC|\sqrt3}{2}\\\\|BC|=\fbox{12}\\\\\frac{|AC|\sqrt3}{2}=\frac{16\sqrt3}{2}=\boxed{8\sqrt2}\\\\12\neq8\sqrt2[/tex]
[tex]If\ use\ Pythagoras\ theorem\ like\ Konrad:\ x=11\\\\|AC|=20\ and\ |AB|=11+1=12\\\\|AC|=2|AB|\to20=2\times12-FALSE...[/tex]
Answer Link
VIEW ALL ANSWERS ( 58+ )
Other Questions
What does RACE stand for?A. Respond, Ask, Construct, ElaborateB. Restate, Answer, Cite, ExplainC. Review, Advise, Conclude, Educate
If 2^a =3,5^b = 2 and abc=1 find the value of 3^c
Cthe Coffect answer from each drop-down menuDIn the figure, the radius of the partial circle with center A is 4 feetThe perimeter of the figure isfeet, and the
If the equation [tex]$2x^3 - 9x^2 - 6 = 0$[/tex] is transformed into an equation in which the second term is missing, the roots are to be diminished byA. [tex]$
3.7.3 Quiz: Circumference of a CircleQuestion 3 of 10If [tex]r[/tex] is the radius of a circle and [tex]d[/tex] is its diameter, which of the following is an eq
Which type of consequence includes depression, antisocial behavior, and/or poor grades?A. PublicB. FamilyC. PersonalD. Legal
Which of the organisms below give support for the colonial theory of animal origins Springinga Choanoflagellates Ediacarans Trilobites Club fungi
Type the correct answer in the box. Spell all words correctly.What is the term to describe colors that are equally spaced from each other on the color wheel?Col
Use the graph to write an equation for the function.
Imagine that you are a teacher. The students in your class believe they should be making most of their own decisions these days, and many are starting to think
a fascist government is one in which. A) The active involvment of the masses is expected B) A communal system of work exists in which the state owns the means o
how do you say *my name is* in german?
Help...!!! What are the causes of the separation of East Pakistan
The length of a rectangle picture frame is 3 inches greater than its width. The area if the picture frame is 40 square inches. Find the dimensions of the pictur
A student is writing the conclusion to a research-based argument supporting continued funding for the space program. Which of the following would best conclude
Describe how primary succession following a volcano is different from secondary succession following a forest fire.
Choose the correct form of the pronoun in parentheses: The favorites for the show were the Bensons and (they, them)
Time-study analysis could best be summarized by which of the following descriptions?
The eastern and southern areas of Africa are called a. Low Africa. b. High Africa. c. Saharan Africa. d. Mediterranean Africa.
Solve. 6(4 – x) + 6x = 24 A.all real numbers B.4 C. –4 D. 0