3 + 6x = 15?
pls help :D

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b