Which equation has both -3 and 3 as possible values of y?

a
y^2=6

b
y^2=8

c
y^2=9

d
y^2=64

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

Miguel has one foot of string. he cuts the string into fourths. how many inches is each piece of string?