$20.\\y=x^2-x-2\\a=1,\ b=-1,\ c=-2\\\\\dfrac{-b}{2a}=\dfrac{-(-1)}{2(1)}=\dfrac{1}{2}\to x=\dfrac{1}{2}\\\\x^2-x-2=0\\\\x^2-2x+x-2=0\\\\x(x-2)+1(x-2)=0\\\\(x-2)(x+1)=0\iff x-2=0\ \vee\ x+1=0\\\\x=2\ \vee\ x=-1$

3 0

3 years ago

PLEASE HELP ! WILL MARK BRAINLIEST !You have seven red marbles and seven blue marbles in a bag. You randomly take a marble from

katrin2010 [14]

Answer:

P= 3/13

Step-by-step explanation:

R=7

B=7

Total=14

P(one red marble)=7/14=1/2

P(another red marble no replacement)=6/13

1/2 times 6/13=6/26=3/13

6 0

3 years ago

Read 2 more answers

FIRST TO ANSWER GET BRAINLEST <br> Solve for x. 2/3(x−7)=−2 Enter your answer in the box. x =

Alex_Xolod [135]

2/3(x−7)=−2

2(x - 7) = (-2) * (3)

2x - 14 = - 6

2x = 8

x = 4

3 0

3 years ago

Sally read 13 books during this month.her brother read 7 books.one fourth of all books they read were non fiction. how many non

vladimir1956 [14]

Thirteen plus seven is twenty. One fourth of twenty is five.
The answer is five.

3 0

3 years ago