At your summer job with a research company, you must get a random sample of people from your town to answer a question about spending habits. which of the following methods is mostly likely to be random?
a. you survey customers at the local shopping mall
b. you survey people chosen randomly from the local phonebook
c. you survey several of your friends
d. you survey customers at a popular restaurant

it's not A it's B guys B) You survey people chosen randomly from the local phone book.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

step-by-step explanation:

1