Answer:
A) {-1,2}
Step-by-step explanation:
square both side of the equation. Then:
x+2=x^2
simplify:
x^2-x-2=0
factor:
(x+1)(x-2)=0
then:
x=-1, x=2
Yes they both are, obviously since their aligned straightly and with he right angle
Answer:
C
Step-by-step explanation:
A straight diagonal line going the middle of the graph is a proportianal relationship.
Answer:

Step-by-step explanation:

☆ (x₁, y₁) is the 1st coordinate and (x₂, y₂) is the 2nd coordinate
Slope of the line

Answer:
$3.50
Step-by-step explanation:
42 divided by 12 is the price of one cookie.
42 divided by 12 = $3.50
hope this helps :)