guzmanfeliciti
03.07.2019 •
English
Need can’t figure it out! plz you y=x^2+2x y=3x+20
Solved
Show answers
More tips
- C Cities and Countries How to Easily and Quickly Obtain a Schengen Visa?...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: English
- E English Choose one of the following topics. write an eight-sentence paragraph that fully develops the topic. a. advances in technology are making people less social. b. drunk...
- E English Can a gentoo penguin swim at the speed of 22 mph?...
- E English How was neil armstrong able to go to college?...
- E English What do the poems she walks in beauty by lord byron and for my lover returning to his wife by anne sexton say about the nature of love and it s impact on individuals?...
- E English Can someone answer the question below asap plz...
- E English What initiated the wife’s exile in “the wife’s lament”?...
- E English How do guys study for tests and exams and stuff? i really need with it cause i am really bad at studying and i don t really know how to do it?...
- E English We form inferences by combining (from the text) with (from our brains)...
- E English Identify the complete adverb clause. I ll meet you because I need to talk to you. I ll meet you I ll meet you because you because I because I need to talk because...
- E English Identify the complete adjective clause. The car I just bought needs all kinds of repairs. The car The car I just bought The car I just bought needs I just bought...
Ответ:
A. y = x^2 + 2x B. y= 3x +20 Substitute 3x +20 for y in Equation A.
A. (3x + 20) = x^2 + 2x Set equation A up equal to 0 by
-3x -20 -3x -20 subtracting 3x and 20 from both sides.
A. 0 = x^2 - x -20 Factor the quadratic equation and solve.
A. 0 = (x - 5)(x + 4)
A. x - 5= 0 x + 4= 0
+5 +5 -4 -4
A. x = 5, x = -4 Now substitute the values for x back into the equations to find the values for y, and your solutions
y = (5)^2 + 2(5) y = 3(5) +20 y = (-4)^2 + 2(-4) y = 3(-4) +20
y= 25 +10 y = 15 +20 y = 16 + (-8) y = -12 +20
y = 35 y = 35 y = 8 y = 8
So your solutions are (5, 35) and (-4, 8).Ответ: