nane718
13.09.2019 •
Mathematics
Which of the following statements follows from (x - 3)2 = 7?
o x-3= = 77
©x2+ 9 = 7
ox-3 = +49
Solved
Show answers
More tips
- F Food and Cooking Deflope: What is it and how does it work?...
- B Business and Finance How to Create a Business Plan? Your Ultimate Guide...
- F Food and Cooking Unusually Delicious Shashlik - Follow the Etiquette of Proper Preparation!...
- C Computers and Internet Make Easy Accessible Screenshots on iPad in Just a Few Minutes...
- T Travel and tourism Lost in the Catacombs: What to Do?...
- F Family and Home Protect Your Home or Apartment from Pesky Ants...
- H Health and Medicine How to Treat Styes: Causes, Symptoms, and Home Remedies...
- L Legal consultation What Documents Are Required for a Russian Passport?...
- F Family and Home How to Properly Use a Water Level?...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
Answers on questions: Mathematics
- M Mathematics Help me plsssss????!?!!0!...
- M Mathematics Tom first opened his business he pay employees w dollars per hour.since then his employees hourly wages has increased by 18%.which expression represents is important employees...
- M Mathematics X+y=2 2x^2+xy+1 Plz answer...
- M Mathematics Suma de vectores en plano cartesiano ...
- B Business Do you consent to the use of pay card for your last paycheck?...
- S Social Studies What do the locations boston, new york, philadelphia, charleston have in common...
- M Mathematics 5. for what value of x is the value of f(x) = 4x – 2 equal to 18? 4x-2...
- B Biology What are the behaviors and physical characteristics of a species that allow them to live successfully in their environment called?...
Ответ:
Taking the first equation:
5x + 2y = 16
2y = 16 - 5x
y = 8 - (5x/2)
Now putting the value of x found from the first equation in the second equation, we get
-4x + 3y = -2
-4x + 3(8 - 5x/2) = -2
-4x + 24 - 15x/2 = -2
-8x + 48 -15x = -4
-23x = -4 - 48
-23x = -52
x = 52/23
Now putting the value of x in the first equation we get
5x + 2y = 16
5(52/23) + 2y = 16
260/23 + 2y = 16
260 + 46y = 368
46y = 368 - 260
46y = 108
y = 108/46
= 54/23
So the value of x is 52/23 and the value of y is 54/23